WO2021228732A1 - Milieu agricole et composition agricole comprenant un matériau phosphorescent - Google Patents

Milieu agricole et composition agricole comprenant un matériau phosphorescent Download PDF

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Publication number
WO2021228732A1
WO2021228732A1 PCT/EP2021/062249 EP2021062249W WO2021228732A1 WO 2021228732 A1 WO2021228732 A1 WO 2021228732A1 EP 2021062249 W EP2021062249 W EP 2021062249W WO 2021228732 A1 WO2021228732 A1 WO 2021228732A1
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Prior art keywords
agricultural
light
plant
range
phosphorescent material
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PCT/EP2021/062249
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English (en)
Inventor
David Downey
Hiroki Yoshizaki
Hiroshi Okura
Ryota YAMANASHI
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Merck Patent Gmbh
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Publication of WO2021228732A1 publication Critical patent/WO2021228732A1/fr

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    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
    • A01G7/00—Botany in general
    • A01G7/04—Electric or magnetic or acoustic treatment of plants for promoting growth
    • A01G7/045—Electric or magnetic or acoustic treatment of plants for promoting growth with electric lighting

Definitions

  • the present invention relates to an agricultural medium, agricultural 5 composition, method of applying the composition, a plant, method for controlling a condition of a plant, method for controlling a condition of a plankton, bacteria and/or alga, use of the light converting medium, and a use of composition.
  • the plant growth is dependent on efficiency of light, temperature, nutrients, water and so on. By putting the nutrients on the leaf, it is especially possible to control the plant growth in the prior arts, for example, as described in WO2012/130924 A1 and WO 2009/055044 A1.
  • a color conversion medium including a plurality of fluorescent materials a light emitting diode device comprising a fluorescent material and optical devices comprising a light conversion medium for agriculture are known in the prior arts, for example, as described in JP 2007-135583A 20 and WO 1993/009664 A1.
  • WO2017/129351 A1 discloses a light converting film containing an inorganic phosphor for controlling of plant growth.
  • WO2019/020653 A1 mentions spray coating of an inorganic phosphor composition especially on a leaf surface of a plant to control the light wavelength from a light source for controlling plant growth.
  • WO2019/020602 A2 mentions an optical medium comprising an inorganic 30 phosphor composition and use of it for controlling plant growth.
  • Patent Literature 2 WO 2009/055044 A1
  • a new agricultural medium comprising, essentially consisting of, or consisting of at least one layer of phosphorescent material, optionally said layer further comprises a matrix material.
  • a matrix material Preferably it is configured for controlling a condition of a living organism.
  • the present invention relates to an agricultural composition comprising, essentially consisting of, or consisting of at least one phosphorescent material.
  • the present invention also relates to a method of applying the composition of the present invention to at least one portion of a living organism and/or an agricultural material, preferably said living organism is selected from one or more members of a group consisting of a plant, preferably said agricultural material is selected from one or more members of the group consisting of an agricultural sheet, a substrate, an agricultural net, preferably said net is an agricultural insect repellant net, a component of green house, a pole configured to support a plant, a planter, plastic ball and a stone.
  • the present invention also relates to a plant coated by at least one phosphorescent material or the composition of the present invention.
  • the present invention also relates to a method for controlling a condition of a plant comprising at least; i) irradiating at least a part of the surface and/or underside of a leaf of a plant with a light emitted from a phosphorescent material.
  • the present invention also relates to a method for controlling a condition of a plankton, bacteria and/or alga, preferably said plankton is a phytoplankton, preferably said bacteria is a photosynthetic bacteria, comprising at least; I) irradiating at least a part of the surface a plankton, bacteria and/or alga with a light emitted from a phosphorescent material of the agricultural medium of the present invention.
  • the present invention further relates to a plant obtained or obtainable from the method of the present invention.
  • the present invention further relates to a use of the agricultural medium of the present invention as an agricultural sheet, preferably as an agricultural malting sheet, an agricultural tunnel sheet, a sheet for green house, an agricultural net for controlling a condition of a plant, a plankton, bacteria and/or alga, preferably said plankton is a phytoplankton, preferably said bacteria is a photosynthetic bacteria.
  • the present invention further relates to a use of the agricultural medium of the present invention and/or the composition of the present invention, for controlling a condition of a plant by placing the agricultural medium to a plant so that the emitted light from the phosphorescent material can irradiate at least a part of the surface and/or a part of the underside of a leaf of a plant, preferably whole part of the surface and/or the whole part of the underside of a leaf of a plant, wherein said light converting medium is neither a LED lamp nor a remote phosphor tape of a LED lamp, preferably said light converting medium and/or the composition is placed within 15 cm to the plant, preferably it is in the range from 0cm to 15cm, more preferably 0.01cm to 15cm, even more preferably from 0.1cm to 10cm, even more preferably in the range from 0.1cm to 5cm.
  • the term "plant” means a multicellular organism in the kingdom Plantae that use photosynthesis to make their own food.
  • the plant can be flowers, vegetables, fruits, grasses, trees and horticultural crops (preferably flowers and horticultural crops, more preferably flowers).
  • the plant can be foliage plants.
  • Exemplified embodiments of grasses are a poaceae, bambuseae (preferably sasa, phyllostachys), oryzeae (preferably oryza), pooideae (preferably poeae), triticeae (preferably elymus), elytrigia, hordeum, triticum, secale, arundineae, centotheceae, chloridoideae, hordeum vulgare, avena sativa, secale cereal, andropogoneae (preferably coix), cymbopogon, saccharum, sorghum, zea (preferably zea mays), sorghum bicolor, saccharum officinarum, coix lacryma-jobi van, paniceae (preferably panicum), setaria, echinochloa (preferably panicum miliaceum), echinochloa esculenta, and setaria italic.
  • Rucola Komatsuna (Japanese mustard spinach) or Radish (preferably Gaillardia, Lettuce, or Rucola).
  • light modulating material is a material which can change at least one of physical properties of light. Preferably it is selected from pigments, dyes and luminescent materials.
  • pigments stands for materials that are insoluble in an aqueous solution and changes the color of reflected or transmitted light as the result of wavelength-selective absorption and/or reflection, e.g. Inorganic pigments, organic pigments and inorganic-organic hybrid pigments.
  • dyes means colored substances that are soluble in an aqueous solution and changes the color as the result of wavelength-selective absorption of irradiation.
  • luminescent means spontaneous emission of light by a substance not resulting from heat. It is intended to include both, phosphorescent light emission as well as fluorescent light emission.
  • light luminescent material is a material which can emit either fluorescent light or phosphorescent light.
  • phosphorescent light emission is defined as being a spin prohibition light emission from a triplet state or higher spin state (e.g. quintet) of spin multiplicity (2S+1 ) ⁇ 3, wherein S is the total spin angular momentum (sum of all the electron spins).
  • Wavelength converting material or briefly referred to as a “converter” means a material that converts light of a first wavelength to light of a second wavelength, wherein the second wavelength is different from the first wavelength.
  • Wavelength converting materials include organic materials and inorganic materials that can achieve photon up-conversion, and organic materials and inorganic materials that can achieve photon down-conversion.
  • photon down-conversion is a process which leads to the emission of light at longer wavelength than the excitation wavelength, e.g. by the absorption of one photon leads to the emission of light at longer wavelength.
  • photon up-conversion is a process that leads to the emission of light at shorter wavelength than the excitation wavelength, e.g. by the two- photon absorption (TPA) or Triplet-triplet annihilation (TTA), wherein the mechanisms for photon up-conversion are well known in the art.
  • organometallic material means a material of organometallic compounds and organic compounds without any metals or metal ions.
  • organometallic compounds stands for chemical compounds containing at least one chemical bond between a carbon atom of an organic molecule and a metal, including alkaline, alkaline earth, and transition metals, e.g. Alq 3 , LiQ, lr(ppy) 3.
  • the inorganic materials include phosphors and semiconductor nanoparticles.
  • a “phosphor” is a fluorescent or a phosphorescent inorganic material which contains one or more light emitting centers.
  • the light emitting centers are formed by activator elements such as e.g. atoms or ions of rare earth metal elements, for example La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb and Lu, and/or atoms or ions of transition metal elements, for example Cr, Mn, Fe, Co, Ni, Cu, Ag, Au and Zn, and/or atoms or ions of main group metal elements, for example Na, Tl, Sn, Pb, Sb and Bi.
  • activator elements such as e.g. atoms or ions of rare earth metal elements, for example La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb and Lu
  • transition metal elements for example Cr, Mn, Fe, Co, Ni, Cu,
  • Suitable phosphors include phosphors based on garnet, silicate, orthosilicate, thiogallate, sulfide, nitride, silicon-based oxynitride, nitridosilicate, nitridoaluminumsilicate, oxonitridosilicate, oxonitridoaluminumsilicate and rare earth doped sialon.
  • Phosphors within the meaning of the present application are materials which absorb electromagnetic radiation of a specific wavelength range, preferably blue and/or ultraviolet (UV) electromagnetic radiation and convert the absorbed electromagnetic radiation into electromagnetic radiation having a different wavelength range, preferably visible (VIS) light such as violet, blue, green, yellow, orange, or red light, or the near infrared light (NIR).
  • UV ultraviolet
  • VIS visible
  • NIR near infrared light
  • UV is electromagnetic radiation with a wavelength from 100 nm to 389nm, shorter than that of visible light but longer than X-rays.
  • VIS is electromagnetic radiation with a wavelength from 390 nm to 700 nm.
  • NIR is electromagnetic radiation with a wavelength from 701 nm to 1,000 nm.
  • semiconductor nanoparticle in the present application denotes a crystalline nanoparticle which consists of a semiconductor material.
  • Semiconductor nanoparticles are also referred to as quantum materials in the present application. They represent a class of nanomaterials with physical properties that are widely tunable by controlling particle size, composition and shape. Among the most evident size dependent property of this class of materials is the tunable fluorescence emission. The tunability is afforded by the quantum confinement effect, where reducing particle size leads to a “particle in a box” behavior, resulting in a blue shift of the band gap energy and hence the light emission.
  • the emission of CdSe nanocrystals can be tuned from 660 nm for particles of diameter of ⁇ 6.5 nm, to 500 nm for particles of diameter of ⁇ 2 nm. Similar behavior can be achieved for other semiconductors when prepared as nanocrystals allowing for broad spectral coverage from the UV (using ZnSe, CdS for example) throughout the visible (using CdSe, InP for example) to the near-IR (using InAs for example).
  • Semiconductor nanoparticles may have an organic ligand on the outermost surface of the nanoparticles.
  • the term “transparent” means at least around 60 % of incident light transmittal.
  • it is over 70 %, more preferably, over 75%, the most preferably, it is over 80 %.
  • Fig. 1 shows a cross sectional view of a schematic of one embodiment of the present invention.
  • Fig. 2a shows a top view of a schematic of one embodiment of one embodiment of an agricultural medium (100) of the present invention when no tensile force is applied.
  • Fig. 2b shows a top view of a schematic of one embodiment of an agricultural medium (200) of the invention when a tensile force is applied.
  • Fig. 3 shows a cross sectional view of a schematic of one embodiment of an agricultural medium (200) of the invention.
  • Fig. 4 shows a cross sectional view of a schematic of one embodiment of an agricultural medium (300) of the invention.
  • Fig. 5a shows a cross sectional view of a schematic of one embodiment of an agricultural medium (500) of the invention.
  • Fig. 5b shows a cross sectional view of a schematic of a one embodiment of a connected two agricultural mediums (501) and (502) of the invention.
  • Fig. 6a shows a cross sectional view of a schematic of one embodiment of the present invention using an agricultural medium (500).
  • Fig. 6b shows a cross sectional view of a schematic of one embodiment of the present invention using a connected two agricultural mediums (501 ) and (502).
  • Fig. 7a shows a top view of a schematic of one embodiment of an agricultural medium (700) of the invention.
  • Fig. 7b shows a cross sectional view of a schematic of one embodiment of the present invention using an agricultural medium (700).
  • Fig. 7c shows a cross sectional view of a schematic of one embodiment of the present invention using an agricultural medium (700).
  • Fig. 8a shows a top view of a schematic of one embodiment of an agricultural medium (800) of the invention.
  • Fig. 8b shows a cross sectional view of a schematic of one embodiment of the present invention using an agricultural medium (800).
  • Fig. 8c shows a cross sectional view of a schematic of one embodiment of the present invention using an agricultural medium (800).
  • Fig. 9 shows the light emission spectra of the LED used in the LED lighting chamber of working example 2
  • the sun an artificial light source can be used instead of the sun
  • light converting part 120. a phosphorescent material
  • the agricultural medium comprising, essentially consisting of, or consisting of at least one layer of phosphorescent material, optionally said layer further comprises a matrix material.
  • said medium is configured for controlling a condition of a living organism, such as a cell, a plant, plankton, bacteria and/or alga.
  • said phosphorescent material is configured to emit light having the peak maximum light wavelength in the range from 380nm to 1000nm, more preferably in the range from 400nm to 800nm, even more preferably it is in the range from 400 to 500 nm and/or from 600 to 750 nm, further more preferably said phosphorescent material is an organic phosphorescent material, inorganic phosphorescent material or a combination of any of them. More preferably, it is a long persistent luminescent material, further more preferably it is a long persistent luminescent inorganic or organic material or a combination of any of these.
  • the inorganic phosphorescent material preferably as the inorganic long persistent luminescent material, publicly available aluminate, phosphate, silicate, halide, germanate, nitride, tin oxide, tungstate, zirconate, gallate, oxide, sulfide, tantanate, borate, niobite inorganic phosphors which can emit phosphorescent light preferably long persistent luminescent light, can be used preferably.
  • CdSiO 3 :Bi 3+ , Ba 2 MgSi 2 O 7 :Eu + ,Tm 3+
  • Ba 4 (Si 3 O 8 ) 2 Eu 2+ , Ho 3+ , Mg 2 SnO 4 :Ti 4+ , Ca 2 SnO 4 :Tm 3+ , Ca 2 SnO 4 :Gd 3+ , CaWO 4 :Bi 3+ , BaZrO 3 :Mg 2+ , BaAI 2 O 4 :Eu 2+ ,Dy 3+ , SrAI 2 O 4 :Eu 2+ ,Dy 3+ , SrAI 2 O 4 :Eu 2+ , Nd 3+ , Dy 3+ , SrAI 2 O 4 : Eu 2+ , Er 3+ , Dy 3+ , SrMgAh 0 Oi 7 : Eu 2+ , Dy 3+ , BCNO, C 3 N 4 , Zr0 2 :Ti 3+ , Lu 2 O 3 :Tb3+,Ca 2+ ,Sr 2+ , Zn 3 (PO 4 ) 2 :
  • CaAI 2 Si 2 O 8 Eu 2+ , Pr 3+ , Ca 2 MgSi 2 O 7 : Eu 2+ , Dy 3+ , Ba 4 (Si 3 O 8 ) 2 : Eu 2+ , Dy 3+ , ZnS:Au + ,ln 3+ , ZnS:Cu+, ZnS:Cu + ,Co 2+ , Gd 2 0 2 S:Er 3+ ,Yb, SrZrO 3 :Pr 3+ , Mg 2 SnO 4 , Y 3 AI 5 0i 2 :Pr 3+ , ZnGa 2 O 4 :Bi 3+ , Ca 2 BO 3 CI:Eu 2+ ,Dy 3+ , CdSiO 3 :Mn 2+ ,Nd 3+ , Ca 2 ZnSi 2 O 7 :Eu 2+ ,Dy 3+ , Sr 2 SiO 4 :Eu 2+ ,Dy 3+ , Ca 3 Sn
  • CaAI 2 Si 2 O 8 Eu 2+ , Mn 2+ , Dy 3+ , Ca 2 MgSi 2 O 7 :Dy 3+ , Sr 2 SiO 4 :Dy 3+ , Sr 2 AI 2 SOC 7 :Ce 3+ ,Dy 3+ , Ca 3 MgSi 2 O 8 :Eu 2+ ,Mn 2+ ,Dy 3+ , Y 2 O 2 S:Dy 3+ ,Mg 2+ ,Si 4+ , CaSnO 3 :Pr 3+ , Sr 4 Al14 25 :Eu 2+ ,Cr 3+ ,Dy 3+ and La 2 Ti 2 O 7 :Sm 3+ ,Ti 4+ can be used preferably singly or in combination. More preferably for UV, CdSiO 3 :Bi 3+ , Ba 2 MgSi 2 O 7 :Eu + ,Tm 3+ can be used singly or in combination of any of these.
  • Ba 5 (PO 4 )3CI:Eu 2+ ,Gd 3+ , Ca 2 P 2 O 7 :Eu 2+ ,Y 3+ , Sr 2 P 2 O 7 :Eu 2+ ,Y 3+ can be used singly or in combination of any of these.
  • Ba 5 (PO 4 ) 3 CI:Eu 2+ ,Gd 3+ , Ca 2 P 2 O 7 :Eu 2+ ,Y 3+ , Sr 2 P 2 O 7 :Eu 2+ ,Y 3+ , CaSnSiO 5 , CdSiO 3 :Gd 3+ , Ca 3 SnSi 2 0 9 , Ca 12 Al14O 33 Eu 2+ ,Nd 3+ , CaAI 2 O 4 :Eu 2+ , Nd 3+ , SrAI 4 O 7 Eu 2+ , Dy 3+ , Gd 3+ , Sr 4 Al 14 O 25 Eu 2+ , Dy 3+ , Zn 2 GeO 4 :Bi 3+ , Zn 2 P 2 O 7 :Tm 3+ , Ca 9 Bi(PO 4 ) 7 :Eu 2+ ,Dy 3+ , Sr 2 MgSi 2 O 7 : Eu 2+ , Dy 3+ , Ca 2 ZrSi
  • Sr 3 Al 10 SiO 20 Eu 2+ , Ho + , Sr 3 MgSi 2 O 8 : Eu 2+ , Dy 3+ , Ca 3 MgSi 2 O 8 : Eu 2+ , Dy 3+ , Ca 3 SnSi 2 0 9 :Pr 3+ , Ba 4 (Si 3 O 8 ) 2 :Eu 2+ ,Er 3+ , Ba 4 (Si 3 O 8 ) 2 :Eu 2+ ,Ho 3+ , Mg 2 SnO 4 :Ti 4+ , Ca2SnO 4 :Tm 3+ , Ca2SnO 4 :Gd 3+ , CaWO 4 :Bi 3+ , BaZrO 3 :Mg 2+ can be used preferably singly or in combination of any of these.
  • CaAI 2 O 4 :Eu 2+ ,Nd 3+ , Sr 4 Al1O 25 :Eu 2+ ,Dy 3+ and Sr 2 MgSi 2 O 7 :Eu 2+ ,Dy 3+ can be used singly or in combination of any of these from the view point of stronger long persistent luminescent ability and/or longer time emission ability of long persistent luminescent light. .
  • SrAl 2 O 4 :Eu 2+ ,Dy 3+ , Ca 2 MgSi 2 O 7 :Eu 2+ ,Dy 3+ , ZnS:Cu + ,Co 2+ , and ZnS:Cu + can be used singly or in combination of any of these from the view point of stronger long persistent luminescent ability and/or longer time emission ability of long persistent luminescent light.
  • Sr 3 Sn207:Sm 3+ can be used preferably singly or in combination of any of these.
  • Ca 3 Ga2Ge 3 O 12 :Cr 3+ ,Yb 3+ , MgSiO 3 :Mn 2+ , SrSnO 3 :Bi 2+ , Sr 2 SnO 4 :Nd 3+ , can be used preferably singly or in combination of any of these.
  • Sr 4 A 14 O 25 :Eu 2+ ,Cr 3+ ,Dy 3+ and La 2 Ti 2 O 7 :Sm 3+ ,Ti 4+ can be used preferably singly or in combination.
  • organic phosphorescent material preferably organic long persistent luminescent (LPL) materials such as the combination of N,N,N ' , N ' -tetramethylbenzidine (TMP) as an electron donner and 2,8- bis(diphenylphosphoryl)dibenzo[b,d]thiophene (PPT) as an electronic acceptor, the combination of TMP, PPT and a known organic light emitter dopants suitable for Organic Light Emitting Diode device, the combination of PBPO as an electronic acceptor (host) and TMB as the donor (guest) like described in JP 6323970 B, R.Kabe, C. Adachi, Nature 2017, 550, 384, Z.Lin et al. , Adv. Mater. 2018, 30, 1803713 can be used preferably.
  • LPL organic long persistent luminescent
  • the layer of phosphorescent material comprises a plurality of phosphorescent materials.
  • the present invention also relates to use one or more the phosphorescent materials mentioned above for agriculture, or for controlling a condition of a living organism.
  • the agricultural medium further comprises at least one light modulating material having the peak maximum light wavelength of the emitted light or a selectively reflected light from the light modulating material in the range from 380nm to 1000nm, more preferably in the range from 400nm to 800nm, even more preferably it is in the range from 400 to 500 nm and/or from 600 to 750 nm,
  • the light modulating material is selected from pigments, dyes and luminescent materials, preferably the light modulating material is a luminescent material, more preferably the light modulating material a luminescent material selected from organic materials or inorganic materials, even more preferably the light modulating material is an inorganic material selected from phosphors or semiconductor nanoparticles,
  • the organic phosphor material (preferable) to be the organic phosphor material of Fluoresceins Rhodamines, Cumarins, Pyrenes, Cyanines, Perylenes, Di-cyano- methylenes that emit a luminescence in the range of long wave-length containing red color area. It is also available to use the luminescence material.
  • any type of publicly known inorganic phosphors such as described in the second chapter of Phosphor handbook (Yen, Shionoya, Yamamoto) having the peak maximum light wavelength of the emitted light or a selectively reflected light from the light modulating material in the range from 380nm to 1000nm, more preferably in the range from 400nm to 800nm, even more preferably it is in the range from 400 to 500 nm and/or from 600 to 750 nm. It is believed that the peak maximum light wavelength of the light emitted from the phosphor in the rage 660 nm to 720 nm is specifically useful for plant growth.
  • the terms "inorganic phosphor” which are used as synonyms here, denote a fluorescent inorganic material in particle form having one or more emitting centres.
  • the emitting centres are formed by activators, usually atoms or ions of a rare-earth metal element, such as, for example, La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb and Lu, and/or atoms or ions of a transition-metal element, such as, for example, Cr, Mn, Fe, Co, Ni, Cu, Ag, Au and Zn, and/or atoms or ions of a main-group metal element, such as, for example, Na, Tl, Sn, Pb, Sb and Bi.
  • a rare-earth metal element such as, for example, La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb and Lu
  • Examples of phosphors include garnet-based phosphors, silicate-based, orthosilicate-based, thiogallate-based, sulfide-based and nitride-based phosphors.
  • the phosphor materials can be phosphor particles with or without silicon dioxide coating.
  • a phosphor in the sense of the present application is taken to mean a material which absorbs radiation in a certain wavelength range of the electromagnetic spectrum, preferably in the blue or UV spectral range, and emits visible light or far red light in another wavelength range of the electromagnetic spectrum, preferably in the violet, blue, green, yellow, orange, red spectral range or far red spectral range.
  • radiation-induced emission efficiency should also be understood in this connection, i.e. the phosphor absorbs radiation in a certain wavelength range and emits radiation in another wavelength range with a certain efficiency.
  • shift of the emission wavelength is taken to mean that a phosphor emits light at a different wavelength compared with another, i.e. shifted towards a shorter or longer wavelength.
  • phosphors come into consideration for the present invention, such as, for example, metal-oxide phosphors, silicate and halide phosphors, phosphate and halophosphate phosphors, borate and borosilicate phosphors, aluminate, gallate and alumosilicate phosphors, phosphors, sulfate, sulfide, selenide and telluride phosphors, nitride and oxynitride phosphors and SiAION phosphors.
  • the phosphor is selected from the group consisting of metal-oxide phosphors, silicate and halide phosphors, phosphate phosphors, borate and borosilicate phosphors, aluminate, gallate and alumosilicate phosphors, sulfate, sulfide, selenide and telluride phosphors, nitride and oxynitride phosphors and SiAION phosphors, preferably, it is a metal oxide phosphor, more preferably it is a Mn activated metal oxide phosphor or a Mn activated phosphate based phosphor, even more preferably it is a Mn activated metal oxide phosphor.
  • Preferred metal-oxide phosphors are arsenates, germanates, halogermanates, indates, lanthanates, niobates, scandates, stannates, tantalates, titanates, vanadates, halovanadates, phosphovanadates, yttrates, zirconates, molybdate and tungstate.
  • it is a metal oxide phosphor, more preferably it is a Mn activated metal oxide phosphor or a Mn activated phosphate based phosphor, even more preferably it is a Mn activated metal oxide phosphor.
  • said inorganic phosphor is selected from the group consisting of metal oxides, silicates and halosilicates, phosphates and halophosphates, borates and borosilicates, aluminates, gallates and alumosilicates, molybdates and tungstates, sulfates, sulfides, selenides and tellurides, nitrides and oxynitrides, SiAIONs, halogen compounds and oxy compounds, such as preferably oxysulfides or oxychlorides phosphors, preferably, it is a metal oxide phosphor, more preferably it is a Mn activated metal oxide phosphor or a Mn activated phosphate based phosphor, even more preferably it is a Mn activated metal oxide phosphor.
  • the inorganic phosphor is selected from the group consisting of AI 2 O 3 :Cr 3+ , Y 3 AI 5 O 12 :Cr 3+ , MgO:Cr 3+ , ZnGa 2 O 4 :Cr 3+ , MgAI 2 O 4 :Cr 3+ , Gd 3 Ga 5 O 12 :Cr 3+ , LiAI 5 O 8 :Cr 3+ , MgSr 3 Si 2 O 8 :Eu 2+ ,M n 2+ , Sr 3 MgSi 2 O 8 :Mn 4+ , Sr 2 MgSi 2 O 7 :Mn 4+ , SrMgSi 2 O 6 :Mn 4+ , BaMg 6 Ti 6 0i 9 :Mn 4+ , Cai 4 AlioZn 6 O 35 :Mn 4+ , Mg 8 Ge 2 0nF 2 :Mn 4+ , Mg 2 TiO 4 :Mn 4+ ,
  • a phosphor or its denaturated (e.g., degraded) substance which less harms animals, plants and/or environment (e.g., soil, water) is desirable.
  • the phosphor is nontoxic phosphors, preferably it is edible phosphors, more preferably as edible phosphors, MgSiO 3 :Mn 2+ , MgO:Fe 3+ , CaMgSi 2 0e:Eu 2+ , Mn 2+ are useful.
  • the term “edible” means safe to eat, fit to eat, fit to be eaten, fit for human consumption.
  • a new light emitting phosphor represented by following general formula (VII) which can exhibit deep red-light emission, preferably with a sharp emission around 700 nm under excitation light of 300 to 400 nm, which are suitable to promote plant growth, can be used preferably.
  • the phosphor can be represented by following chemical formula (VII ' ).
  • the component A stands for at least one cation selected from the group consisting of Si 4+ , Ge 4+ , Sn 4+ , Ti 4+ and Zr 4+ , preferably A is Si 4+ ; 0 ⁇ x ⁇ 0.5, preferably 0.05 ⁇ x ⁇ 0.4.
  • Mn of formula (VII) is Mn4 + .
  • the phosphor represented by chemical formula is Si5P6O25: Mn 4+ .
  • Said phosphor represented by chemical formula (VII) or (VI I) can be fabricated by the following method comprising at least the following steps (w) and (x); (w) mixing a source of the component A in the form of an oxide, and a source of the activator selected from one or more members of the group consisting of MnO2, MnO, MnCO 3 , Mn(OH)2, MnSO 4 , Mn(N03)2, MnCI 2 MnF2, Mn(CH 3 COO)2 and hydrates of MnO 2 , MnO, MnC0 3 , Mn(OH) 2 , MnSO 4 , Mn(NO 3 ) 2 , MnCI 2 , MnF 2 , Mn(CH 3 COO) 2 ; and at least one material selected from the group consisting of inorganic alkali, alkaline-earth, ammonium phosphate and hydrogen phosphate, preferably the materials is ammonium dihydrogen phosphate, in a
  • any publicly known powder mixing machine can be used preferably in step (w).
  • said calcination step (x) is carried out under atmospheric pressure in the presence of oxygen, more preferably under air condition.
  • said calcination step (x) is carried out for the time at least one hour, preferably in the range from 1 hour to 48 hours, more preferably it is from 6 hours to 24 hours, even more preferably from 10 hours to 15 hours.
  • step (x) After the time period of step (x), the calcinated mixture is cooled down to room temperature.
  • a solvent is added in step (w) to get a better mixture condition.
  • said solvent is an organic solvent, more preferably it is selected from one or more members of the group consisting of alcohols such as ethanol, methanol, ipropan-2-ol, butan-1-ol; ketones such as acetone, 2-hexanone, butanone, ethyl isopropyl ketone.
  • the method further comprises following step (y) after step (w) before step (x):
  • step (y) subjecting the mixture from step (w) to pre-calcination at the temperature in the range from 100 to 500°C, preferably in the range from 200 to 400°C, even more preferably from 250 to 350°C.
  • said calcination step (y) is carried out for the time at least 1 hour, preferably from 1 hour to 24 hours, more preferably in the range from 1 hour to 15 hours, even more preferably it is from 3 hours to 10 hours, furthermore preferably from 5 hours to 8 hours.
  • pre-calcinated mixture is cooled down to a room temperature preferably.
  • the method additionally comprises following step (w ' ) after pre-calcination step (y),
  • step (w ' ) mixing a mixture obtained from step (y) to get a better mixing condition of the mixture.
  • any publicly known powder mixing machine can be used preferably in step (w ' ).
  • the method further comprises following step (z) before step (x) after step (w), preferably after step (w ' ),
  • step (z) molding said mixture from step (w) or (y) into a compression molded body by a molding apparatus.
  • the method optionally comprises following step (v) after step (x),
  • a molding apparatus As a molding apparatus, a publicly known molding apparatus can be used preferably.
  • a metal oxide phosphor as a metal oxide phosphor, another new light emitting phosphor represented by following general formula (VIII), (IX) or (X) which can exhibit deep red-light emission, preferably with a sharp emission around 700 nm under excitation light of 300 to 400 nm, which are suitable to promote plant growth, can be used preferably.
  • a 1 at least one cation selected from the group consisting of Mg 2+ , Ca 2+ , Sr 2+ and Ba 2+ Zn 2+ , preferably A 1 is Ba 2+ ;
  • B 1 at least one cation selected from the group consisting of Sc 3+ , Y 3+ , La 3+ , Ce 3+ , B 3+ , Al 3+ and Ga 3+ , preferably B 1 is Y 3+ ;
  • C 1 at least one cation selected from the group consisting of V 5+ , Nb 5+ and Ta 5+ , preferably C 1 is Ta 5+ ;
  • a 2 at least one cation selected from the group consisting of Li + , Na + , K + Rb + and Cs + , preferably A 2 is Na + ;
  • B 2 at least one cation selected from the group consisting of Sc 3+ , La 3+ , Ce 3+ , B 3+ , Al 3+ and Ga 3+ , preferably B 2 is La 3+ ;
  • C 2 at least one cation selected from the group consisting of Mg 2+ , Ca 2+ , Sr 2+ , Ba 2+ and Zn 2+ , preferably C 2 is Mg 2+ ;
  • D 1 at least one cation selected from the group consisting of Mo 6+ and W 6+ , preferably D 1 is W 6+ .
  • Mn is Mn4 +
  • the phosphor represented by chemical formula (X) is Nal_aMgWO 6 :Mn 4+ and the phosphor represented by chemical formula (IX) Ba 2 YTaO 6 :Mn 4+ .
  • Said phosphor represented by chemical formula (VIII) or (IX) can be fabricated by the following method comprising at least the following steps (w “ ) and (x ' ); (w " ) mixing sources of components A 1 , B 1 , C 1 , or A 2 , B 2 , C 2 , and D 1 in the form of solid oxides and/or carbonates; and a source of Mn activator selected from one or more members of the group consisting of MnO2, MnO, MnCO 3 , Mn(OH) 2 , MnSO 4 , Mn(NO 3 ) 2 , MnCI, MnF 2 , Mn(CH 3 COO) 2 and hydrates of MnO 2 , MnO, MnCO 3 ,
  • a 2 : B 2 : C 2 : D 1 : Mn 1 : 1 : 1 : (1-y) : y (0 ⁇ y ⁇ 0.5); wherein 0 ⁇ x ⁇ 0.5, 0 ⁇ y ⁇ 0.5, preferably 0.01 ⁇ x ⁇ 0.4, 0.01 ⁇ y ⁇ 0.4; more preferably 0.05 ⁇ x ⁇ 0.1, 0.05 ⁇ y ⁇ 0.1; to get a reaction mixture,
  • mixtures are preferred comprising component A 1 in the form of their oxides (MgO, ZnO) or carbonates (CaCO 3 , SrCO 3 , BaCO 3 ), and the remaining components B 1 , C 1 an Mn in the form of their oxides (SC 2 O3, Y 2 O3, La 2 03, Ce203, B2O3, AI2O3, Ga203 on one hand and V2O5, Nb 2 O 5 , Ta 2 O 5 and MnO 2 on the other).
  • component A 1 in the form of their oxides (MgO, ZnO) or carbonates (CaCO 3 , SrCO 3 , BaCO 3 )
  • B 1 , C 1 an Mn in the form of their oxides SC 2 O3, Y 2 O3, La 2 03, Ce203, B2O3, AI2O3, Ga203 on one hand and V2O5, Nb 2 O 5 , Ta 2 O 5 and MnO 2 on the other.
  • lanthanum oxide it is advantageous to pre-heat the material at 1.
  • mixtures are preferred comprising component A 2 and C 2 in the form of their oxides (MgO, ZnO) or carbonates (Li 2 CO 3 Na 2 CO 3 , K 2 CO 3 , Rb 2 CO 3 , C S2 CO 3 , CaCO 3 , SrCO 3 , BaCO3 ) , and the remaining components B 2 , D 2 and Mn in the form of their oxides (SC 2 O 3 , La 2 O 3 , Ce 2 O 3 , B 2 O 3 , AI 2 O 3 , Ga 2 O 3 on one hand and M0O3, WO3 and Mn0 2 on the other).
  • MgO, ZnO oxides
  • carbonates Li 2 CO 3 Na 2 CO 3 , K 2 CO 3 , Rb 2 CO 3 , C S2 CO 3 , CaCO 3 , SrCO 3 , BaCO3
  • B 2 , D 2 and Mn in the form of their oxides (SC 2 O 3 , La 2 O 3 , Ce 2 O 3 , B 2
  • any publicly known powder mixing machine can be used preferably in step (w).
  • said calcination step (c ' ) is carried out under atmospheric pressure in the presence of oxygen, more preferably under air condition.
  • said calcination step (c ' ) is carried out for the time at least one hour, preferably in the range from 1 hour to 48 hours, more preferably it is from 6 hours to 24 hours, even more preferably from 10 hours to 15 hours.
  • step (c ' ) After the time period of step (c ' ), the calcinated mixture is cooled down to room temperature.
  • a solvent is added in step (w " ) to get a better mixture condition.
  • said solvent is an organic solvent, more preferably it is selected from one or more members of the group consisting of alcohols such as ethanol, methanol, ipropan-2-ol, butan-1-ol; ketones such as acetone, 2-hexanone, butanone, ethyl isopropyl ketone.
  • the method further comprises following step (y ' ) after step (w " ) before step (c ' ):
  • step (y ' ) subjecting the mixture from step (w " ) to pre-calcination at the temperature in the range from 100 to 500°C, preferably in the range from 200 to 400°C, even more preferably from 250 to 350°C.
  • pre-calcination at the temperature in the range from 100 to 500°C, preferably in the range from 200 to 400°C, even more preferably from 250 to 350°C.
  • it is carried out under atmospheric pressure and in the presence of oxygen, more preferably under air condition.
  • said calcination step (y ' ) is carried out for the time at least 1 hour, preferably from 1 hour to 24 hours, more preferably in the range from 1 hour to 15 hours, even more preferably it is from 3 hours to 10 hours, furthermore preferably from 5 hours to 8 hours. After the time period, pre-calcinated mixture is cooled down to a room temperature preferably.
  • the method additionally comprises following step (w '' ) after pre-calcination step (y ' ),
  • step (w '" ) mixing a mixture obtained from step (y ' ) to get a better mixing condition of the mixture.
  • any publicly known powder mixing machine can be used preferably in step (w '" ).
  • the method further comprises following step (z ) before step (x ' ) after step (w ' ), preferably after step (w '" ),
  • step (z ' ) molding said mixture from step (w) or (y) into a compression molded body by a molding apparatus.
  • the method optionally comprises following step (v ' ) after step (x ' ),
  • the inorganic phosphors can emit a light having the peak maximum light wavelength of light emitted from the inorganic phosphor in the range from 600nm to 710nm, preferably it is from 660nm to 710nm. It is believed that the peak maximum light wavelength of light emitted from the inorganic phosphor in the range from 660 nm to 710 nm is very suitable for plant condition control, especially for plant growth promotion.
  • the inorganic phosphor having at least one light absorption peak maximum light wavelength in UV and / or purple light wavelength region from 300 nm to 430 nm may keep harmful insects off plants.
  • the inorganic phosphor can have at least one light absorption peak maximum light wavelength in UV and / or purple light wavelength reason from 300 nm to 430 nm.
  • an inorganic phosphor having a first peak maximum light wavelength of light emitted from the inorganic phosphor in the range from 400nm to 500nm and a second peak maximum light wavelength of light emitted from the inorganic phosphor from 650 nm to 750 nm can be used preferably.
  • the inorganic phosphor having the first peak maximum light wavelength of light emitted from the inorganic phosphor is in the range from 430 nm to 490 nm, and the second peak light emission wavelength is in the range from 660 nm to 740 nm, more preferably the first peak maximum light wavelength of light emitted from the inorganic phosphor is 450 nm and the second peak maximum light wavelength of light emitted from the inorganic phosphor is in the range from 660 nm to 710 nm, is used.
  • said at least one inorganic phosphor is a plurality of inorganic phosphor having the first and second peak maximum light wavelength of light emitted from the inorganic phosphor, or a plurality of inorganic phosphor having the first and second peak maximum light wavelength of light emitted from the inorganic phosphor, or a combination of these.
  • Mn 4+ activated metal oxide phosphors Mn, Eu activated metal oxide phosphors, Mn 2+ activated metal oxide phosphors, Fe 3+ activated metal oxide phosphors can be used preferably from the viewpoint of environmentally friendly since these phosphors do not create Cr 6+ during synthesis procedure.
  • the Mn 4+ activated metal oxide phosphors are very useful for plant growth, since it shows narrow full width at half maximum (hereafter “FWHM”) of the light emission, and have the peak absorption wavelength in UV and green wavelength region such as 350 nm and 520 nm, and the emission peak maximum light wavelength is in near infrared ray region such as from 650 nm to 730 nm. More preferably, it is from 670 nm to 710 nm.
  • FWHM narrow full width at half maximum
  • the Mn 4+ activated metal oxide phosphors can absorb the specific UV light which attracts insects, and green light which does not give any advantage for plant growth, and can convert the absorbed light to longer wavelength in the range from 650 nm to 750 nm, preferably it is from 660 nm to 740 nm, more preferably from 660 nm to 710 nm, even more preferably from 670 nm to 710 nm, which can effectively accelerate plant growth.
  • the inorganic phosphor can be selected from Mn activated metal oxide phosphors.
  • the inorganic phosphor is selected from one or more of Mn activated metal oxide phosphors or Mn activated phosphate based phosphors represented by following formulae (I) to (VI),
  • a x ByO z :Mn 4+ - (I) wherein A is a divalent cation and is selected from one or more members of the group consisting of Mg 2+ , Zn 2+ , Cu 2+ , Co 2+ , Ni 2+ , Fe 2+ , Ca 2+ , Sr 2+ , Ba 2+ , Mn 2+ , Ce 2+ and Sn 2+ , B is a tetravalent cation and is Ti 3+ , Zr 3+ or a combination of these; x ⁇ 1 ; y ⁇ 0; (x+2y) z, preferably A is selected from one or more members of the group consisting of Mg 2+ , Ca 2+ , Sr 2+ , Ba 2+ ,
  • Zn 2+ , B is Ti 3+ , Zr 3+ or a combination of Ti 3+ and Zr 3+ , x is 2, y is 1, z is 4, more preferably, formula (I) is Mg2Ti04:Mn 4+ ;
  • X is a monovalent cation and is selected from one or more members of the group consisting of Li + , Na + , K + , Ag + and Cu + ;
  • D is a divalent cation and is selected from one or more members of the group consisting of Mg 2+ , Zn 2+ , Cu 2+ , Co 2+ , Ni 2+ , Fe 2+ , Ca 2+ , Sr 2+ , Ba 2+ , Mn 2+ , Ce 2+ and Sn 2+ ;
  • D is a trivalent cation and is selected from one or more members of the group consisting of Al 3+ , Ga 3+ , Lu 3+ , Sc 3+ , La 3+ and ln 3+
  • E is a trivalent cation and is selected from the group consisting of Al 3+ , Ga 3+ , Lu 3+ , Sc 3+ , La 3+ and ln 3+
  • (1.5g+1.5h) I, preferably D is La 3+ , E is Al 3+ ,
  • G is a divalent cation and is selected from one or more members of the group consisting of Mg 2+ , Zn 2+ , Cu 2+ , Co 2+ , Ni 2+ , Fe 2+ , Ca 2+ , Sr 2+ , Ba 2+ , Mn 2+ , Ce 2+ and Sn 2+ ;
  • J is a trivalent cation and is selected from the group consisting of Y 3+ , Al 3+ , Ga 3+ , Lu 3+ , Sc 3+ , La 3+ and ln 3+ ;
  • a 1 at least one cation selected from the group consisting of Mg 2+ , Ca 2+ , Sr 2+ and Ba 2+ Zn 2+ , preferably A 1 is Ba 2+ ;
  • B 1 at least one cation selected from the group consisting of Sc 3+ , Y 3+ , La 3+ , Ce 3+ , B 3+ , Al 3+ and Ga 3+ , preferably B 1 is Y 3+ ;
  • C 1 at least one cation selected from the group consisting of V 5+ , Nb 5+ and Ta 5+ , preferably C 1 is Ta 5+ ;
  • a 2 at least one cation selected from the group consisting of Li + , Na + , K + Rb + and Cs + , preferably A 2 is Na + ;
  • B 2 at least one cation selected from the group consisting of Sc 3+ , La 3+ , Ce 3+ , B 3+ , Al 3+ and Ga 3+ , preferably B 2 is La 3+ ;
  • C 2 at least one cation selected from the group consisting of Mg 2+ , Ca 2+ , Sr 2+ , Ba 2+ and Zn 2+ , preferably C 2 is Mg 2+ ;
  • D 1 at least one cation selected from the group consisting of Mo 6+ and W 6+ , preferably D 1 is W 6+ .
  • a Mn activated metal oxide phosphor represented chemical formula (VI) is more preferable since it emits a light with a first peak maximum light wavelength of light emitted from the inorganic phosphor in the range of 500nm or less, and a second peak maximum light wavelength of light emitted from the inorganic phosphor in the range of 650 nm or more, preferably the first peak maximum light wavelength of light emitted from the inorganic phosphor is in the range from 400nm to 500nm, and the second peak light emission wavelength is in the range from 650 nm to 750 nm, more preferably the first peak maximum light wavelength of light emitted from the inorganic phosphor is in the range from 420 nm to 480 nm, and the second peak light emission wavelength is in the range from 660 nm to 740 nm, even more preferably the first peak maximum light wavelength of light emitted from the inorganic phosphor is in the rage from 430 nm to 460 nm and the
  • said phosphor is a Mn activated metal oxide phosphor or a phosphate based phosphor represented by chemical formula (I), (VII), (IX) or (X).
  • the inorganic phosphor can be a Mn activated metal oxide phosphor selected from the group consisting of Mg 2 TiO 4 :Mn 4+ , Li 2 TiO 3 :Mn 4+ , CaAli 2 O 19 :Mn 4+ ,
  • the total amount of the phosphor of the composition is in the range from Owt.% to 30wt.% based on the total amount of the composition, preferably it is from 0.1wt.% to 10wt.%, more preferably from 0.3wt.% to 5wt.%, furthermore preferably it is from 0.5wt.% to 3wt % from the view point of better light conversion property, lower production cost and less production damage of a production machine.
  • the agricultural medium comprises a plurality of light modulating materials.
  • the total amount of the phosphorescent material in the layer based on the total amount of the layer is in the range from 1wt.% to 100wt.%, preferably from 30wt.% to 100wt. from the view point of obtaining suitable intensity of long persistent luminescent light emission.
  • the agricultural medium has the layer thickness in the range from 1 ⁇ m to 50mm, preferably it is in the range from 10 pm to 25mm, more preferably in the range from 50 pm to 10mm, preferably said agricultural medium is an agricultural sheet having the thickness in the range from 1 pm to 50mm, preferably it is in the range from 10 pm to 25mm, more preferably in the range from 50 pm to 10mm.
  • said light modulating materials can be in the layer of phosphorescent material and/or in a different part of the agricultural medium such as an another layer.
  • the matrix material is present in the layer and it is an organic material, inorganic material or a combination of these, preferably it is a polymer or an oligomer, preferably it is an inorganic polymer, inorganic oligomer, organic polymer, organic oligomer or a combination of any of these, more preferably it is an organic oligomer or an organic polymer material, even more preferably an organic polymer is selected from the group consisting of a transparent photosetting polymer, a thermosetting polymer, a thermoplastic polymer or a combination of any of these. Any publicly available one can be used.
  • AI2O3, fused composition of Te02 : Na2Co3 : ZnO : BaCo 3
  • the matrix material is an organic oligomer or an organic polymer material, more preferably an organic polymer selected from the group consisting of a transparent photosetting polymer, a thermosetting polymer, a thermoplastic polymer, or a combination of any of these, can be used preferably.
  • the matrix material is an organic material, and/or an inorganic material, preferably the matrix material is an organic material, more preferably it is an organic oligomer or an organic polymer material, even more preferably an organic polymer selected from the group consisting of a transparent photosetting polymer, a thermosetting polymer, a thermoplastic polymer, or a combination of any of these.
  • said matrix material has the refractive index(n) in the range from 1.4 to 1.7, more preferably from 1.45 to 1.60 from the view point of improved light emission from the phosphorescent material via said matrix material.
  • organic polymer materials polysaccharides, polyethylene, polypropylene, polystyrene, polymethyl pentene, polybutene, butadiene styrene, polyvinyl chloride, polystyrene, polymethacrylic styrene, styrene- acrylonitrile, acrylonitrile-butadiene-styrene, polyethylene terephthalate, polymethyl methacrylate, polyphenylene ether, polyacrylonitrile, polyvinyl alcohol, acrylonitrile polycarbonate, polyvinylidene chloride, polycarbonate, polyamide, polyacetal, polybutylene terephthalate, polytetrafluoroethylene, ethyl vinyl acetate copolymer, ethylene tetrafluorethylen copolymer, polyamide, phenol, melamine, urea, urethane, epoxy, unsaturated polyester, polyallyl sulfone, polyvin
  • (meth)acrylates can be used preferably.
  • unsubstituted alkyl-(meth) acrylates for examples, methyl-acrylate, methyl-methacrylate, ethyl-acrylate, ethyl-methacrylate, butyl-acrylate, butyl-methacrylate, 2-ethylhexyl-acrylate, 2-ethylhexyl- methacrylate; substituted alkyl-(meth)acrylates, for examples, hydroxyl- group, epoxy group, or halogen substituted alkyl-(meth)acrylates; cyclopentenyl(meth)acrylate, tetra-hydro furfuryl-(meth)acrylate, benzyl (meth)acrylate, polyethylene-glycol di-(meth)acrylates.
  • the matrix material has a weight average molecular weight in the range from 5,000 to 50,000 preferably, more preferably from 10,000 to 30,000.
  • thermosetting polymer publicly known transparent thermosetting polymer can be used preferably. Such as OE6550 (trade mark) series (Dow Corning).
  • thermoplastic polymer the type of thermoplastic polymer is not particularly limited.
  • thermoplastic polymers can be copolymerized if necessary.
  • thermoplastic polymer or thermosetting polymer based on their physical properties.
  • the medium further comprises one or more of additional layers, preferably said layer of phosphorescent material is sandwiched by said additional layers, preferably at least one of additional layers is a light reflection layer.
  • the medium further comprises at least one connecting part, preferably it is configured to connect another agricultural sheet and/or to connect another part of the sheet.
  • the medium is an agricultural sheet, an agricultural net or a component of a green house, preferably said medium does not contain any electrodes, preferably it is not an electronic device such as a LED.
  • the medium contains a support material coated by said layer, preferably said support materials is made from one or more of organic materials, one or more of inorganic materials or a combination of these, preferably said support material is not an electronic device or an electronic element, preferably said support material is a sheet, substrate, net, preferably an agricultural insect repellant net, a component of green house, a pole configured to support a plant, a planter, plastic ball, and a stone.
  • said medium can be easily attached and also it can be easily removed. And one or more of said light converting mediums can be attached on the same plant or more than two plants to irradiate the underside surface of that plants effectively.
  • said medium can comprise a light converting part and at least one connecting part configured to attach said medium to a part of a plant or configured to connect another agricultural medium or another part of the medium to change the shape of the medium like described in Fig. 2a, Fig.2b, Fig. 3, Fig. 4 and/or Fig. 5, wherein said light converting part comprises at least one light modulating material and a matrix material, preferably said light converting part comprises a plurality of phosphorescent materials.
  • the medium comprises at least one light converting part and said light converting part comprises one or more slits like described in Fig. 2a and Fig.2b.
  • the medium can comprise two or more light converting parts.
  • said one or more slits can be used to place the medium to a part of plant, preferably underside of a leaf by catching one or more slits on a leaf or stem of a plant.
  • the medium preferably an agricultural sheet, a plate for agriculture or an agricultural net
  • the medium can be rigid or flexible.
  • the present invention relates to an agricultural composition comprising at least one phosphorescent material.
  • said phosphorescent material has a peak maximum light wavelength in the range from 380nm to 1100nm, more preferably in the range from 400nm to 800nm, even more preferably it is in the range from 400 to 500 nm and/or from 600 to 750 nm, further more preferably said phosphorescent material is an organic phosphorescent material, inorganic phosphorescent material or a combination of any of them.
  • a plurality of phosphorescent materials is in the composition.
  • the composition further comprises at least one light modulating material having the peak maximum light wavelength of the emitted light or a selectively reflected light from the light modulating material in the range from 380nm to 1000nm, more preferably in the range from 400nm to 800nm, even more preferably it is in the range from 400 to 500 nm and/or from 600 to 750 nm.
  • a plurality of light modulating material is in the composition.
  • the composition comprises at least one solvent selected from water, organic solvent or a combination of these.
  • the composition can further comprise at least one solvent which comprises at least one selected from the group of water and organic solvent.
  • Known usual water can be used as said water, which can be selected from agricultural water, tap-water, industrial water, pure water, distilled water and deionized water. Including said organic solvent in the composition is useful for dissolving the solute.
  • the organic solvent is preferably selected from alcohol solvent, ether solvent and mixture thereof.
  • One preferable embodiment of said alcohol solvent is selected from ethanol, isopropanol, cyclohexanol, phenoxyethanol, benzyl alcohol or mixture thereof. More preferable embodiment of said alcohol solvent is ethanol.
  • ether solvent is selected from dimethyl ether, propyl cellosolve, butyl cellosolve, phenyl cellosolve, propylene glycol monomethyl ether, propylene glycol monoethyl ether, propylene glycol monopropyl ether, propylene glycol monobutyl ether, propylene glycol monophenyl ether or mixture thereof. More preferable embodiment of said ether solvent is dimethyl ether.
  • the weight ratio of said solvent(s) in the composition, to the total amount of the composition is preferably in the range from 70 to 99.95 wt.%, more preferably from 80 to 99.90 wt.%, further preferably from 90 to 99.90 wt.%, furthermore preferably from 95 to 99.50 wt.%.
  • One embodiment of the wait ratio of said water to the sum of other solvents is preferably from 80 to 100 wt.%, more preferably from 90 to 100 wt.%, further preferably from 95 to 100 wt.%, furthermore preferably from 99 to 100 wt.%.
  • the said solvent is preferably water, ethanol, dimethyl ether or mixture thereof.
  • the solvent consisting of water is one preferred embodiment to avoid unnecessary effect for animals.
  • the weight ratio of the phosphor(s) to the total weight of the composition is preferably in the range from 0.05 to 30 wt.%, more preferably from 0.1 to 10 wt.%, further preferably from 0.5 to 5 wt.%, furthermore preferably from 0.8 to 3 wt.%.
  • the applied amount of the phosphor(s) on a plant depends on the phosphor’s concentration and the composition’s dose to be applied. The skilled person can control them based on an applied measure, a purpose, plant species, and so on. Of course, the sum of the mass ratio of said solvent and the mass ratio of the phosphor(s) to the total mass of the composition doesn’t exceed 100 wt.%.
  • the mol/L of the phosphor(s) in the composition is preferably in the range from 10 -7 to 10 -2 mol/L, more preferably from 10 -6 to 10 -3 mol/L, further preferably from 10 -5 to 10 -4 mol/L.
  • the phosphor has variety range of its molecular weight, known methods to get an average molecular weight (preferably a weight average molecular weight) can be used to calculate its mol/L (molar concentration).
  • composition and/or the light converting medium according to the present invention can further comprise one or more of additives.
  • Comprising a spreading agent and/or a surface treatment agent is one preferable embodiment.
  • the composition further comprises at least one an additive, preferably the additive is selected from a spreading agent, a surface treatment agent or a combination of these.
  • the additive is selected from a spreading agent, a surface treatment agent or a combination of these.
  • the composition applied onto the leaves the composition had better to remain on the leaves for some period to exhibit its property. But wax secreted by leaves can inhibit this composition remained on leaves, and drop off it from the leaves.
  • a spreading agent functions improving spreading performances, wettability, and/or adhesion of the composition.
  • a surface treatment agent can change the polarity of the phosphor or leave surface (preferably the phosphor) to decrease repulsive force between them.
  • a spreading agent can be selected from the group consisting of isopropyl myristate, isopropyl palmitate, caprylic/capric acid esters of saturated C 12-1 8 fatty alcohols, oleic acid, oleyl ester, ethyl oleate, triglycerides, silicone oils, dipropylene glycol methyl ether, and combination thereof.
  • Approach Bl Trade mark, Kao Corp.
  • the weight ratio of the spreading agent to the weight of the light modulating material such as phosphor, in the composition is 5 - 200 wt.%, preferably 5 - 100 wt.%, more preferably 5 - 20 wt.%, and furthermore preferably 7.5 - 15 wt.%.
  • the mass ratio of the surface treatment agent to the mass of the phosphor in the composition is 5 - 200 wt.%, preferably 5 - 100 wt.%, more preferably 5 - 20 wt.%, and furthermore preferably 7.5 - 15 wt.%.
  • the composition can further comprise an ingredient(s).
  • Preferable embodiments of the ingredient are an adjuvant, a dispersant, a surfactant, a fungicide, a pesticide, a fertilizer, an antimicrobial agent, and/or an antifungal agent.
  • An adjuvant can enhance permeability of effective component (e.g. insecticide), inhibit precipitation of solute in the composition, or decrease a phytotoxicity.
  • the solutes (e.g. the phosphors) in the composition are not necessarily dissolved in the composition.
  • a dispersant is useful because it helps the solutes to be applied uniformly to at least one portion of a plant (preferably to the surface of the plant leaves).
  • a surfactant means it does not comprise or is not comprised by other additives, for example a spreading agent, a surface treatment agent and an adjuvant.
  • a phosphor with good suspensibility is desirable because the phosphor is easily suspended in the composition.
  • an adjuvant can be selected from the group consisting of a mineral oil, an oil of vegetable or animal origin, alkyl esters of such oils or mixtures of such oils and oil derivatives, and combination thereof.
  • Preferred embodiments of the surfactant are polyoxyethylene alkyl ethers (e.g., polyoxyethylene lauryl ether, polyoxyethylene oleyl ether and polyoxyethylene cetyl ether); polyoxyethylene fatty acid diethers; polyoxyethylene fatty acid monoethers; polyoxyethylene-polyoxypropylene block polymer; acetylene alcohol; acetylene glycol derivatives (e.g., acetylene glycol, polyethoxyate of acetylene alcohol, and polyethoxyate of acetylene glycol); silicon-containing surfactants (e.g., Fluorad (Trademark, Sumitomo 3M Ltd), MEGAFAC (Trademark, DIC Corp.), and Surufuron (Trademark, Asahi Glass Co., Ltd.)); and organic siloxane surfactants, such as, KP341 (Trademark, Shin-Etsu Chemical Co., Ltd.).
  • acetylene glycols examples include: 3-methyl-1-butyne-3-ol, 3-methyl-1 -pentyne-3-ol, 3,6-dimethyl-4-octyne-3,6-diol, 2,4, 7,9- tetramethyl- 5-decyne-4,7-diol, 3,5-dimethyl-1-hexyne-3-ol, 2,5-dimethyl-3- hexyne-2,5-diol, and 2,5-dimethyl-2,5- hexanediol.
  • anionic surfactants include: ammonium salts and organic amine salts of alkyldiphenylether disulfonic acids, ammonium salts and organic amine salts of alkyldiphenylether sulfonic acids, ammonium salts and organic amine salts of alkylbenzenesulfonic acids, ammonium salts and organic amine salts of polyoxyethylenealkylether sulfuric acids, and ammonium salts and organic amine salts of alkyl-sulfuric acids.
  • amphoteric surfactants include 2-alkyl-N- carboxymethyl-N-hydroxyethyl imidazolium betaine, and laurylic acid amidopropyl hydroxy sulfone betaine.
  • an active ingredient of pesticide formulation is a pesticide ingredient.
  • an active ingredient of fertilizer formulation is a fertilizer ingredient.
  • the weight ratio of each 1 additive of dispersant, surfactant, fungicide, a pesticide, a fertilizer, antimicrobial agent and antifungal agent, to the weight of the phosphor in the composition is 5 - 200 wt.%, preferably 5 - 200 wt.%, more preferably 5 - 150 wt.%, further preferably 5 - 20 wt.%, and furthermore preferably 7.5 - 15 wt.%.
  • the present invention also relates to a method of applying the composition of the present invention to at least one portion of a living organism and/or an agricultural material, preferably said living organism is selected from one or more members of a group consisting of a plant, cell, plankton, bacteria and/or alga, preferably said agricultural material is selected from one or more members of the group consisting of an agricultural sheet, a substrate, an agricultural net, preferably said net is an agricultural insect repellant net, a component of green house, a pole configured to support a plant, a planter, plastic ball and a stone.
  • the method is applying the composition to the surface and/or the underside surface of a single or a plurality of leaves of a plant.
  • the average amount of the composition to be applied to the surface and/or the underside surface of the plant leaves is 0.0005 - 0.1 mL/cm 2 of the surface.
  • the composition is applied by spraying, watering, dropping, dipping, coating or combination of thereof.
  • the composition is applied one or more times during the growing season of the plant.
  • the composition is applied to at least one portion of a living organism and/or an agricultural material, with gas, preferably said gas is air, nitrogen gas, CO 2 gas or a combination of these.
  • the present invention also relates to a plant coated by at least one phosphorescent material or the composition of the present invention.
  • the present invention further relates to method for controlling a condition of a plant comprising at least; i) irradiating at least a part of the surface and/or underside of a leaf of a plant with a light emitted from a phosphorescent material.
  • the step (i) comprises at least the following steps ii) and iii); ii) absorbing at least a part of light that passed through a leaf of a plant with at least one phosphorescent material, a composition comprising at least one phosphorescent material and/or an agricultural medium comprising at least one phosphorescent material, wherein said at least one phosphorescent material, said composition comprising at least one phosphorescent material and/or said agricultural medium comprising at least one phosphorescent material, is placed at least a part of the surface and/or underside of a leaf; iii) irradiating at least a part of the surface and/or the underside surface of a leaf of a plant with light emitted from the phosphorescent material.
  • the light emitted from phosphorescent material has the peak maximum light wavelength in the range from 380nm to 1000nm, more preferably in the range from 400nm to 800nm, even more preferably it is in the range from 400 to 500 nm and/or from 600 to 750 nm, further more preferably said phosphorescent material is an organic phosphorescent material, inorganic phosphorescent material or a combination of any of them.
  • the light modulating material, the composition and/or the agricultural medium is placed directly onto the surface and/or the underside surface of a leaf of a plant or within 15 cm from the surface and/or the underside surface of a leaf of a plant, preferably the distance between the surface and/or the underside surface of a leaf of a plant and the light modulating material is in the range from 0cm to 15cm, more preferably 0.01cm to 15cm, even more preferably from 0.1cm to 10cm, even more preferably in the range from 0.1cm to 5cm.
  • the present invention furthermore relates to a method for controlling a condition of a plankton, bacteria and/or alga, preferably said plankton is a phytoplankton, preferably said bacteria is a photosynthetic bacteria, comprising at least;
  • a suitable phosphorescent materials for the purpose of the present invention. It is modulating a condition of a plant by enhancing the optimal wavelength which are blue, red or infrared in color.
  • the inventors also found a suitable device structure of the agricultural medium. This material also possesses good resistance to the environment.
  • the phosphorescent material of the present invention itself or in the form of composition or agricultural medium, directly behind the plants, it is believed that it can more efficiently control the growth of plants due to a structure of a leaf and it can re-use the light that passed through a leaf of a plant.
  • a method for placing the phosphorescent material and/or the composition onto at least a part of a backside of a leaf of a plant is preferably characterized by using a spray method in order to place a plant growth regulating solution on the backside of a leaf of a plant.
  • a spray method in order to place a plant growth regulating solution on the backside of a leaf of a plant.
  • whole part of the backside of a leaf of a plant is coated by the light modulating material and/or the composition.
  • a direct coating method using brush can also be used in order to place the light modulating material and/or the composition onto at least a part of a backside of a leaf of a plant.
  • the functional phosphors or pigments solution can be sprayed on the plants so that it can emit light or reflect an incident light towards the underside of a leaf of a plant more effectively and to control plant condition e.g. promoting plant growth and adjusting the amount of plant chemicals.
  • the phosphorescent material and/or an agricultural medium is coated by an adhesive material.
  • publicly available optically transparent adhesive material can be used preferably. More preferably, said adhesive material is transparent at least at the peak light wavelength emitted from the phosphorescent material.
  • the present invention further relates to method for controlling a condition of a plant comprising at least; i) providing a first agricultural material containing a phosphorescent material and/or a light modulating material between a light source (such as the sun light and/or an artificial light) and a plant, ii) irradiating at least a part of the surface and/or underside of a leaf of said plant with a light emitted from an agricultural material containing a phosphorescent material and/or a light modulating material, iii) adjusting a height of said agricultural material either by connecting it to a second agricultural material, preferably said first and/or the second agricultural material has a connecting part and said first and second agricultural material is connected by said connecting part, or by changing a shape of the first agricultural material to irradiate at least a part of the surface and/or underside of a leaf of growed plant more efficiently.
  • a light source such as the sun light and/or an artificial light
  • the present invention also relates to a plant obtained or obtainable from any one of the method of the present invention.
  • the present invention also relates to use of the agricultural medium of the present invention as an agricultural sheet, preferably as an agricultural malting sheet, an agricultural tunnel sheet, a sheet for green house, an agricultural net for controlling a condition of a plant, a plankton, bacteria and/or alga, preferably said plankton is a phytoplankton, preferably said bacteria is a photosynthetic bacteria.
  • the present invention also relates to use of any one of the agricultural medium of the present invention and/or any one the composition of the present invention, for controlling a condition of a plant by placing the agricultural medium to a plant so that the emitted light from the phosphorescent material can irradiate at least a part of the surface and/or a part of the underside of a leaf of a plant, preferably whole part of the surface and/or the whole part of the underside of a leaf of a plant, wherein said light converting medium is neither a LED lamp nor a remote phosphor tape of a LED lamp, preferably said light converting medium and/or the composition is placed within 15 cm to the plant, preferably it is in the range from 0cm to 15cm, more preferably 0.01cm to 15cm, even more preferably from 0.1cm to 10cm, even more preferably in the range from 0.1cm to 5cm.
  • An agricultural medium for controlling a condition of a living organism comprising at least one layer of phosphorescent material, optionally said layer further comprises a matrix material.
  • said phosphorescent material is configured to emit light having the peak maximum light wavelength in the range from 380nm to 1000nm, more preferably in the range from 400nm to 800nm, even more preferably it is in the range from 400 to 500 nm and/or from 600 to 750 nm, further more preferably said phosphorescent material is an organic phosphorescent material, inorganic phosphorescent material or a combination of any of them, preferably as the inorganic long persistent luminescent material is selected from aluminate, phosphate, silicate, halide, germanate, nitride, tin oxide, tungstate, zirconate, gallate, oxide, sulfide, tantanate, borate, niobite inorganic phosphors which can emit phosphorescent light preferably long persistent luminescent light, particularly preferably it is selected from the group consisting of CdSiO 3 :Bi 3+ , Ba 2 MgSi 2 O
  • Ba 4 (Si 3 O 8 ) 2 Eu 2+ , Ho 3+ , Mg 2 SnO 4 :Ti 4+ , Ca 2 SnO 4 :Tm 3+ , Ca 2 SnO 4 :Gd 3+ , CaWO 4 :Bi 3+ , BaZrO 3 :Mg 2+ , BaAI 2 O 4 :Eu 2+ ,Dy 3+ , SrAI 2 O 4 :Eu 2+ ,Dy 3+ ,
  • CaAI 2 Si 2 O 8 Eu 2+ , Mn 2+ , Dy 3+ , Ca 2 MgSi 2 O 7 :Dy 3+ , Sr 2 SiO 4 :Dy 3+ , Sr 2 AI 2 SiO 7 :Ce 3+ ,Dy 3+ , Ca 3 MgSi 2 O 8 :Eu 2+ ,Mn 2+ ,Dy 3+ , Y 2 0 2 S:Dy 3+ ,Mg 2+ ,Si 4+ , CaSnO 3 :Pr 3+ , Sr 4 Al14 25 :Eu 2+ ,Cr 3+ ,Dy 3+ and La 2 Ti 2 O 7 :Sm 3+ ,Ti 4+ can be used preferably singly or in combination.
  • the medium of embodiment 1 or 2 further comprises at least one light modulating material having the peak maximum light wavelength of the emitted light or a selectively reflected light from the light modulating material in the range from 380nm to 1000nm, more preferably in the range from 400nm to 800nm, even more preferably it is in the range from 400 to 500 nm and/or from 600 to 750 nm, preferably the light modulating material is selected from pigments, dyes and/or luminescent materials, preferably the light modulating material is a luminescent material, more preferably the light modulating material is a luminescent material selected from organic materials and/or inorganic materials, even more preferably the light modulating material is an inorganic material selected from phosphors or semiconductor nanoparticles, furthermore preferably the light modulating material is a phosphor based on garnet, silicate, orthosilicate, thiogallate, sulfide, nitride, silicon-based oxynitride, nitridosi
  • said light modulating material is a metal oxide phosphor selected from one or more members of the group consisting of AI 2 O 3 :Cr 3+ , Y 3 AI 5 O 12 :Cr 3+ , MgO:Cr 3+ , ZnGa 2 O 4 :Cr 3+ , MgAI 2 O 4 :Cr 3+ , Gd 3 Ga 5 0 12 :Cr 3+ , LiAI 5 O 8 :Cr 3+ , MgSr 3 Si 2 O 8 :Eu 2+ ,Mn 2+ , Sr 3 MgSi 2 O 8 :Mn 4+ , Sr 2 MgSi 2 O 7 :Mn 4+ , SrMgSi 2 O 6 :IVIn 4+ , BaMg 6 Ti 6 O 19 :Mn 4+ ,
  • a metal oxide phosphor selected from one or more members of the group consisting of AI 2 O 3 :Cr 3+ , Y 3 AI 5 O 12 :
  • the medium of any one of embodiments 1 to 4 has the layer thickness in the range from 1 pm to 50mm, preferably it is in the range from 10 pm to
  • the matrix material is present in the layer and it is an organic material, inorganic material or a combination of these, preferably it is a polymer or an oligomer, preferably it is an inorganic polymer, inorganic oligomer, organic polymer, organic oligomer or a combination of any of these, more preferably it is an organic oligomer or an organic polymer material, even more preferably an organic polymer is selected from the group consisting of a transparent photosetting polymer, a thermosetting polymer, a thermoplastic polymer or a combination of any of these.
  • the medium of any one of embodiments 1 to 6, further comprises one or more of additional layers, preferably said layer of phosphorescent material is sandwiched by said additional layers, preferably at least one of additional layers is a light reflection layer.
  • the medium of any one of embodiments 1 to 7, further comprises at least one connecting part, preferably it is configured to connect another agricultural sheet and/or to connect another part of the sheet.
  • the medium of any one of embodiments 1 to 8 is an agricultural sheet, an agricultural net or a component of a green house, preferably said medium does not contain any electrodes, preferably it is not an electronic device such as a LED.
  • the medium of any one of embodiments 1 to 9, contains a support material coated by said layer, preferably said support materials is made from one or more of organic materials, one or more of inorganic materials or a combination of these, preferably said support material is not an electronic device or an electronic element, preferably said support material is a sheet, substrate, net, preferably an agricultural insect repellant net, a component of green house, a pole configured to support a plant, a planter, plastic ball, and a stone.
  • An agricultural composition for controlling a condition of a living organism comprising at least one phosphorescent material.
  • composition of embodiment 11 wherein said phosphorescent material has a peak maximum light wavelength in the range from 380nm to 1100nm, more preferably in the range from 400nm to 800nm, even more preferably it is in the range from 400 to 500 nm and/or from 600 to 750 nm, further more preferably said phosphorescent material is an organic phosphorescent material, inorganic phosphorescent material or a combination of any of them.
  • the composition of embodiment 10 or 12, further comprises at least one light modulating material having the peak maximum light wavelength of the emitted light or a selectively reflected light from the light modulating material in the range from 380nm to 1000nm, more preferably in the range from 400nm to 800nm, even more preferably it is in the range from 400 to 500 nm and/or from 600 to 750 nm, preferably the light modulating material is selected from pigments, dyes and/or luminescent materials, preferably the light modulating material is a luminescent material, more preferably the light modulating material is a luminescent material selected from organic materials and/or inorganic materials, even more preferably the light modulating material is an inorganic material selected from phosphors or semiconductor nanoparticles, furthermore preferably the light modulating material is a phosphor based on garnet, silicate, orthosilicate, thiogallate, sulfide, nitride, silicon-based oxynitride, nitridosi
  • said light modulating material is a metal oxide phosphor selected from one or more members of the group consisting of AI 2 O 3 :Cr 3+ , Y 3 AI 5 O 12 :Cr 3+ , MgO:Cr 3+ , ZnGa 2 O 4 :Cr 3+ , MgAI 2 O 4 :Cr 3+ , Gd 3 Ga 5 0i 2 :Cr 3+ , LiAI 5 O 8 :Cr 3+ , MgSr 3 Si 2 O 8 :Eu 2+ ,Mn 2+ , Sr 3 MgSi 2 O 8 :Mn 4+ ,
  • a metal oxide phosphor selected from one or more members of the group consisting of AI 2 O 3 :Cr 3+ , Y 3 AI 5 O 12 :Cr 3+ , MgO:Cr 3+ , ZnGa 2 O 4 :Cr 3+ , MgAI 2 O 4 :Cr 3+ , Gd 3 Ga 5
  • composition of any one of embodiments 10 to 13 comprises at least one solvent selected from water, organic solvent or a combination of these.
  • composition of any one of embodiments 10 to 14 further comprising an additive, preferably the additive is selected from a spreading agent, a surface treatment agent or a combination of these.
  • composition of any one of embodiments 10 to 15, further comprises a matrix material, preferably it is inorganic material, organic material or a combination of these, more preferably, it is a polymer or an oligomer, preferably it is an inorganic polymer, inorganic oligomer, organic polymer, organic oligomer or a combination of any of them, more preferably it is an organic oligomer or an organic polymer material, even more preferably an organic polymer is selected from the group consisting of a transparent photosetting polymer, a thermosetting polymer, a thermoplastic polymer or a combination of any of these.
  • Method of applying the composition of any one of embodiments 1o to 18 to at least one portion of a living organism and/or an agricultural material preferably said living organism is selected from one or more members of a group consisting of a plant, preferably said agricultural material is selected from one or more members of the group consisting of an agricultural sheet, a substrate, an agricultural net, preferably said net is an agricultural insect repellant net, a component of green house, a pole configured to support a plant, a planter, plastic ball and a stone.
  • composition is applied to at least one portion of a living organism and/or an agricultural material, with gas, preferably said gas is air, nitrogen gas, CO2 gas or a combination of these.
  • Method for controlling a condition of a plant comprising at least; i) irradiating at least a part of the surface and/or underside of a leaf of a plant with a light emitted from a phosphorescent material.
  • step (i) comprises at least the following steps ii) and iii); ii) absorbing at least a part of light that passed through a leaf of a plant with at least one phosphorescent material, a composition comprising at least one phosphorescent material and/or an agricultural medium comprising at least one phosphorescent material, wherein said at least one phosphorescent material, said composition comprising at least one phosphorescent material and/or said agricultural medium comprising at least one phosphorescent material, is placed at least a part of the surface and/or underside of a leaf; iii) irradiating at least a part of the surface and/or the underside surface of a leaf of a plant with light emitted from the phosphorescent material.
  • step i), preferably in step ii) and/or step iii), a phosphorescent material, the composition and/or the light converting medium is placed directly onto the surface and/or the underside surface of a leaf of a plant or within 15 cm from the surface and/or the underside surface of a leaf of a plant, preferably the distance between the surface and/or the underside surface of a leaf of a plant and the light modulating material is in the range from 0cm to 15cm, more preferably 0.01cm to 15cm, even more preferably from 0.1cm to 10cm, even more preferably in the range from 0.1cm to 5cm. 30.
  • Method for controlling a condition of a plankton, bacteria and/or alga preferably said plankton is a phytoplankton, preferably said bacteria is a photosynthetic bacteria, comprising at least; I) irradiating at least a part of the surface a plankton, bacteria and/or alga with a light emitted from a phosphorescent material of the agricultural medium of any one of embodiments 1 to 10.
  • any one of embodiments 1 to 10 as an agricultural sheet, preferably as an agricultural malting sheet, an agricultural tunnel sheet, a sheet for green house and/or an agricultural net for controlling a condition of a plant, a plankton, bacteria and/or alga, preferably said plankton is a phytoplankton, preferably said bacteria is a photosynthetic bacteria.
  • the present invention provides one or more of technical effects as listed below; in the case of the materials set on the leaf surface (front side), depending on the particle size of the material and the dispersion on the leaves, the influence of back scattering may become large, therefore the irradiation amount from the light source to the leaf surface inside is decreased, increasement of light from an agricultural sheet or net when the amount / intensity of the sun light is decreasing such as when the outside is getting dark or when the weather condition the outside is changing, improvement of controlling property of a phytoplankton condition, photosynthetic bacteria and/or alga, preferably acceleration of growth of phytoplankton, photosynthetic bacteria and/or alga; improvement of controlling property of plant condition, preferably controlling of a plant height; controlling of color of fruits; promotion and inhibition of germination; controlling of synthesis of chlorophyll and carotenoids, preferably by blue light; plant growth promotion; adjustment and / or acceleration of flowering time of plants; controlling of production of plant components, such as increasing production amount, controlling of polyphenols content
  • lettuces are cultivated with using 10 AP7-4 phosphor plates obtained in working example 1 for 21 days in an LED lighting chamber (PPFD: 160 ⁇ 190; at room temperature).
  • the distance between said phosphor plates and lettuces are 40cm.
  • the wavelength of the LED used in the LED lighting chamber is indicated in Fig. 8.
  • Reference plates are fabricated in the same manner as described in working example 1 expect for that no afterglow (phosphor/long persistent luminescent) material is used.

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  • Life Sciences & Earth Sciences (AREA)
  • Biodiversity & Conservation Biology (AREA)
  • Botany (AREA)
  • Ecology (AREA)
  • Forests & Forestry (AREA)
  • Environmental Sciences (AREA)
  • Management, Administration, Business Operations System, And Electronic Commerce (AREA)
  • Hydroponics (AREA)
  • Luminescent Compositions (AREA)

Abstract

La présente invention concerne un milieu agricole pour lutter contre une maladie d'un organisme vivant.
PCT/EP2021/062249 2020-05-13 2021-05-10 Milieu agricole et composition agricole comprenant un matériau phosphorescent WO2021228732A1 (fr)

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