CN102816008A - Easily degradable vegetable oil-coated controlled-release fertilizer and technology for preparing same - Google Patents
Easily degradable vegetable oil-coated controlled-release fertilizer and technology for preparing same Download PDFInfo
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Abstract
The invention relates to an easily degradable vegetable oil-coated controlled-release fertilizer and a technology for preparing the same. The vegetable oil-coated controlled-release fertilizer comprises a core fertilizer and a vegetable oil-coated layer which wraps the core fertilizer, wherein the total coating ratio is 2-12wt%, a vegetable oil coating agent consists of a component A and a components B as follows: the component A is obtained through reacting 18-22 parts of vegetable oil, 2-5 parts of polyhydric alcohol, 7-10 parts of dimethylbenzene and 1 part of vegetable fiber by weight under stirring for 0.8-2 hours in a reactor under the condition of 55-65 DEG C; and the component B is obtained through adding 2-4 parts of polyprotic acid or acid anhydride into 8-12 parts of the vegetable oil by weight to be activated for 1-2 hours at 110-180 DEG C. The technology is simple, the nutrient controlled-release period of a product can be controlled at 1-9 months, and nutrients are accurately controlled to release, so the fertilizer utilization ratio is increased, and pollution is reduced.
Description
Technical field
The invention belongs to the release and release control fertilizer production field, be specifically related to a kind of Vegetable oil lipoprotein coating controlled-release fertilizer and preparation technology thereof of easy degraded.
Background technology
China's chemical fertilizer consumption amount accounts for 20 ~ 30% of world Fertilizer total quantity consumed, ranks first in the world, and developed country's chemical fertilizer this season utilization ratio average out to 50 ~ 60%, China's chemical fertilizer this season utilization ratio on average is merely 30 ~ 35%.The loss waste of macronutrient not only brings enormous economic loss to society, but also can cause serious environmental to pollute.At present, along with the continuous increase of fertilizer amount, devote exclusive attention to output and lay equal stress on both quality and quantity at agricultural-food, and the requirement of eco-friendly multiple target down, the modification problem of fertilizer just seems even more important.
The appearance of release and release control fertilizer has improved utilization rate of fertilizer, helps reducing environmental pollution, guarantees grain security, has also satisfied peasant's actual demand.Film-coated controlled release fertilizer is to be core with the granular chemical fertilizer; The top layer applies the inorganic substance or the organic polymer of one deck low water solubility or microsolubility; Change the stripping property of chemical fertilizer nutrient, prolongation or control fertilizer nutrient discharge, and make the supply of soil nutrient and the new-type fertilizer formulation that crop needs fertile requirement to coordinate.The kind of film-coated controlled release fertilizer; Divide from coated fertilizer; Can be divided into inorganics coated fertilizer and organic polymer coated fertilizer; The former majority is with mineral manure that contains certain nutrient or soil conditioner and so on material, and the latter includes organic synthesis thing of organic polymer, low water solubility or insoluble etc. as coated fertilizer.But present ubiquitous problem is that inorganic coating nutrient controlled-release effect is relatively poor, and organic polymer coating price is higher, and the degraded of film material is slower.
CN101357867A discloses a kind of humic acid membrane wrapping control-releasing fertilizer; It is to use sticker and solidifying agent thereof that the solid film material is wrapped in the coating controlled-release fertilizer that the fertiliser granulates surface makes, through following prepared: the first step: granulated fertilizer is added urethane resin and solidifying agent tung oil thereof, soya-bean oil, oleum lini after the preheating in encapsulation tool; Second step: spread humic acid solid film material on the fertiliser granulates of motion, continue heating and keep temperature, solidify to form shock resistance, attrition resistant coating layer, accomplish one time coating; The 3rd step: repeat first and second step in order repeatedly, make required humic acid membrane wrapping control-releasing fertilizer.Controlled release fertilizer product nutrient content of the present invention is higher, and coating layer shock resistance, wear resistance are strong.Improvement low productive soil physical and chemical character, humic acids ability activation nutrient, the content of increase soil with organic matter, quick-acting nitrogen, rapid available phosphorus, available potassium, the solid, liquid, gas of improving in the soil three are compared.CN101357865A discloses a kind of technology of industrial production of membrane wrapping control-releasing fertilizer; Wherein coating liquid preparation is by weight 1: 18-20 is configured to spray solution with coated fertilizer pitch or rubber with organic solvent YLENE, methylene dichloride or toluene in dissolution kettle, and adding additive starch or zeyssatite.Coating is in encapsulation tool, to utilize setting off by contrast of hot gas that spray solution is sprayed on the fertiliser granulates surface of continuous fluidisation motion, and fertiliser granulates weight is 8-15 times of coated fertilizer, keeps 45-55 ℃ of temperature, forms coating layer.This technology helps the recovery fully to solvent, overcomes the adhesion phenomenon in the coating process.
Vegetables oil is a kind of biodegradable environment-friendly materials, is liquid at normal temperatures mostly, and minority is semisolid or solid, like Chinese tallow tree fat, coconut wet goods.Use more have VT 18, plam oil, Oleum Gossypii semen, peanut oil, sunflower seeds wet goods, Semen Maydis oil and sunflower seed oil China also abound with in a large number.Because contain a large amount of unsaturated fatty acids acid glycerides in the middle of the vegetables oil, these unsaturated fatty acids acid glycerides are by unsaturated acid and glycerine be combined intos such as oleic acid, linoleic acid plus linolenic acids.They itself are not contain hydroxyl, need handle through the unsaturated double-bond on the vegetables oil molecular chain being carried out epoxidation, prepare the polyvalent alcohol with certain functionality and molecular weight.Vegetables oil is mainly used in preparation synthetic resins and softening agent in coatings industry at present, can be used as edible oil and lubricating oil, also can be used in the industry such as soap, medicine.
Summary of the invention
The problem high to organic polymer coating controlled-release fertilizer price in the prior art and the putamina degraded is slow, the present invention provides a kind of vegetables oil coating controlled-release fertilizer and preparation technology thereof of easy degraded.
Terminological interpretation:
Total coating rate is meant that coating layer weight accounts for the per-cent of the fertile weight of nuclear core.
Technical scheme of the present invention is following:
One vegetable oil coating controlled-release fertilizer comprises that the nuclear core is fertile and is coated on the vegetables oil coating layer on the nuclear core fertilizer that total coating rate is 2 ~ 12wt%, and described vegetables oil coating controlled-release fertilizer is the agent of vegetables oil coating to be coated on the nuclear core fertiliser granulates make.The agent of vegetables oil coating is made up of following A component and B component.
The A component: by weight, 18-22 part vegetables oil, 2-5 part polyvalent alcohol, 7-10 part YLENE, 1 part of vegetable fibre stirring reaction 0.8-2h under 55-65 ℃ of condition;
Said polyvalent alcohol is glycerine, tetramethylolmethane, TriMethylolPropane(TMP), Xylitol or sorbyl alcohol.
Said vegetable fibre is selected from one of rice husk, crop material, wood chip or combination.
The B component: by weight, 8-12 part vegetables oil adds 2-4 part polyprotonic acid or acid anhydrides, 110-180 ℃ of priming reaction 1-2h;
Said polyprotonic acid or acid anhydrides are selected from phthalic acid, m-phthalic acid, Tetra hydro Phthalic anhydride or phthalic anhydride.
Preferred according to the present invention, said vegetables oil is selected from VT 18, oleum lini, tung oil or Oleum Gossypii semen.But be not limited thereto.
Preferred according to the present invention, said vegetables oil coating controlled-release fertilizer is a particulate state fertilizer, and its particle size range is 1.0 ~ 5.5mm.
Preferred according to the present invention, said vegetables oil coating controlled-release fertilizer is a particulate state fertilizer, and total coating rate is preferably 4 ~ 8wt%.
Preferred according to the present invention, the agent of said vegetables oil coating is made up of following A component and B component by weight:
A component: 20 parts of vegetables oil, 2 parts of polyvalent alcohols, 9 parts of YLENE, 1 part of vegetable fibre stirring reaction 0.8-2h under 55-65 ℃ of condition in reaction kettle;
Said polyvalent alcohol is glycerine or tetramethylolmethane;
Said vegetable fibre is selected from one of rice husk, crop material, wood chip or combination, fineness 120 ~ 200 orders;
The B component: 10 parts of vegetables oil add 2 parts of polyprotonic acids or acid anhydrides, priming reaction 1-2h in the 110-180 ℃ of following reaction kettle; Be weight part; Said polyprotonic acid or acid anhydrides are phthalic acid or phthalic anhydride.
According to the present invention, the preparation technology of a vegetable oil coating controlled-release fertilizer comprises that step is following:
(1) screening, weighing granulated fertilizer are delivered to tablets press as nuclear core fertilizer, are preheated to 50-60 ℃.
(2) configuration A component: with vegetables oil, polyvalent alcohol, YLENE, vegetable fibre stirring reaction 0.8-2h under 55-65 ℃ of condition in reaction kettle, make the A component by proportioning;
Configuration B component: by proportioning vegetables oil is added polyprotonic acid or acid anhydrides, priming reaction 1-2h in 110 ℃ of-180 ℃ of following reaction kettles makes the B component.
A component and B component are mixed, promptly get the agent of vegetables oil coating.
(3) the vegetables oil coating agent with step (2) is added on the granulated fertilizer in step (1) tablets press; Vegetables oil coating agent consumption is the 1-3wt% of the fertile weight of nuclear core; Keep 50 ~ 60 ℃ of granulated fertilizer temperature, utilize the phase mutual friction of fertiliser granulates, Vegetable oil lipoprotein is uniform spreading on the fertiliser granulates surface of motion; Solidify to form the rete of smooth densification then, accomplish one time the Vegetable oil lipoprotein coating;
(4) repeat above-mentioned steps (3),, promptly get required vegetables oil coating controlled-release fertilizer until meeting the requirements of total coating rate.
Vegetable oil lipoprotein coating controlled-release fertilizer of the present invention, appearance color can be shades of colours such as colourless, green, yellow, orange, and this can realize through in the coating agent, adding various dyestuffs.
The application of Vegetable oil lipoprotein coating controlled-release fertilizer of the present invention, the Vegetable oil lipoprotein coating controlled-release fertilizer is used as base manure; Perhaps Vegetable oil lipoprotein coating controlled-release fertilizer and common fertilizer are blended into the fertile method of BB (blending); Through this fertilizing method; The available nutrient that controlled release BB is fertile can be supplied the nutrition at plant growth initial stage; Controlled release nutrients has then guaranteed the demand of plant growth later stage to nutrition, and the later stage is not taken off fertilizer, has reached the purpose of the perfect unity of fertile good nutrient controlled release properties of controlled release BB and product price.More help further reducing the fertilising cost, on field crop, apply better.
Excellent results of the present invention is following:
Vegetable oil lipoprotein coating controlled-release fertilizer of the present invention meets slow release fertilizer GB/T 23348-2009 national standard that played enforcement on September 1st, 2009 and the release and release control fertilizer HG/T 4215-2011 industry standard requirement of implementing on July 1st, 2012; Has good controlled-release effect; Aspect improving utilization rate of fertilizer, avoiding widespread pollution from the overuse of fertilizers and pesticides in rural area and protection environment, obtained outstanding technique effect.
The present invention adopts the vegetable oil production controlled release fertile, natural degradable, and environmental friendliness is non-petrochemicals, does not rely on petroleum industry, is not vulnerable to the influence of international petroleum price, low price; The use of vegetable fibre can be incorporated in the coating system by the molecular chain of microbiological degradation, after controlled release fertilizer is executed in the soil; Nutrient discharges residual putamina under the effect of microbial enzyme; Reactions such as hydrolysis and oxidation take place, and these molecular ruptures become the fragment of low molecular mass, after mikrobe absorbs or consumes these and hang down the fragment of molecular masses relatively; Form carbonic acid gas, water and bioenergy through metabolism, finally reach the purpose of quick degraded.
Reaction medium of the present invention is a vegetables oil nontoxic and with low cost, and vegetables oil both can be used as dispersion medium and used, and reaction curable again film forming becomes the component part of coating.Therefore, its solid content of coating layer is almost 100%, has guaranteed the smooth realization of this coating process and the quality of product.
The unusual effect that the present invention also has is: technology is simple, does not need specific installation, and the building equipment investment is low; The nutrient controlled release phase of product can be regulated according to membrane wrapping thickness and mould material prescription; Can be controlled in and do not wait in 1 month to 9 months; Also can product and the blending according to a certain percentage of common composite fertilizer with different release period, different release characteristics be simulated various crops to nutrient demand in addition, make various crop special-purpose control-release fertilizers; Controlled release fertile nutrient release profiles and crop are matched to the nutrient absorbing curve, reach the purpose of the accurate controlled release of nutrient.
The present invention will adopt the Vegetable oil lipoprotein coating to prepare controlled release fertilizer, and not only controlled-release effect is good, and can solve the problem that the organic polymer price is high and the putamina degraded is slow; Reduce the controlled-release fertilizer production cost; Not only satisfy the demand of high gardening landscape plant, and can on field crop, be applicable, to improve crop quality through the technology of applying fertilizers scientifically; Improve utilization rate of fertilizer, reduce widespread pollution from the overuse of fertilizers and pesticides in rural area.
Description of drawings
Fig. 1 is the product structure figure of vegetables oil coating controlled-release fertilizer of the present invention.Wherein, the 1st, the coating layer that controlled release is fertile, the 2nd, the fertilizer nuclear core that controlled release is fertile.
Fig. 2-5 is respectively the nutrient releasing curve diagram of embodiment 1-4 product.
Embodiment
Below in conjunction with embodiment the present invention is further specified, but be not limited thereto.
(1) screening, weighing 1000kg granular urea are delivered to tablets press, are preheated to 50-60 ℃.
(2) A component: 10kg vegetables oil, 1kg glycerine, 4.5kg YLENE, 0.5kg vegetable fibre stirring reaction 50min under 55-65 ℃ of condition in reaction kettle;
The B component: the 10kg vegetables oil adds 2kg Tetra hydro Phthalic anhydride, 180 ℃ of following reaction kettle for reaction 1.2h.
Get the A component and the B component mixes, be the agent of vegetables oil coating; Subsequent use;
(3) the vegetables oil coating agent with step (2) is added on the granular urea in step (1) tablets press; Vegetables oil coating agent consumption is the 1.4wt% of the fertile weight of nuclear core; Keep 50 ~ 60 ℃ of fertilizer temperature, utilize the phase mutual friction of fertiliser granulates, Vegetable oil lipoprotein is uniform spreading on the fertiliser granulates surface of motion; Finally solidify to form the rete of smooth densification, accomplish one time the Vegetable oil lipoprotein coating process.
(4) again repeating step (3) once, the Vegetable oil lipoprotein coated release-controlled urea that to make total coating rate be 2.8wt%.Nutrient releasing curve diagram such as Fig. 2.
Embodiment 2, vegetables oil coated carbamide
(1) screening, weighing 1000kg granular urea are delivered to tablets press, are preheated to 50-60 ℃.
(2) A component: 6.2kg vegetables oil, 0.70kg tetramethylolmethane, 2.79g YLENE, 0.31kg vegetable fibre stirring reaction 1.2h under 55-65 ℃ of condition in reaction kettle;
The B component: the 5kg vegetables oil adds 1kg phthalic anhydride, 110 ℃ of following reaction kettle for reaction 1.5h;
A component and B component are mixed, be the agent of vegetables oil coating, subsequent use;
(3) the vegetables oil coating agent with step (2) is added on the granular urea in step (1) tablets press; Vegetables oil coating agent consumption is the 1.6wt% of the fertile weight of nuclear core; Keep 50 ~ 60 ℃ of fertilizer temperature, utilize the phase mutual friction of fertiliser granulates, Vegetable oil lipoprotein is uniform spreading on the fertiliser granulates surface of motion; Finally solidify to form the rete of smooth densification, accomplish one time the Vegetable oil lipoprotein coating process.
(4) again repeating step (3) once, the Vegetable oil lipoprotein coated release-controlled urea that to make total coating rate be 3.2wt%.Nutrient releasing curve diagram such as Fig. 3.
(1) screening, weighing lion horse 45% (15-15-15) granulated fertilizer 500kg are delivered to tablets press, are preheated to 50-60 ℃.
(2) A component: get 6kg vegetables oil, 1.5kg TriMethylolPropane(TMP), 1.5g YLENE, 0.3kg vegetable fibre stirring reaction 2h under 55-65 ℃ of condition in reaction kettle;
The B component: the 2.7kg vegetables oil adds 0.5kg m-phthalic acid, 130 ℃ of following reaction kettle for reaction 1.6h.
A component and B component are mixed, be the agent of vegetables oil coating, subsequent use;
(3) the vegetables oil coating agent with step (2) is added on the granular urea in step (1) tablets press; Vegetables oil coating agent consumption is the 2.5wt% of the fertile weight of nuclear core; Keep 50 ~ 60 ℃ of fertilizer temperature, utilize the phase mutual friction of fertiliser granulates, Vegetable oil lipoprotein is uniform spreading on the fertiliser granulates surface of motion; Finally solidify to form the rete of smooth densification, accomplish one time the Vegetable oil lipoprotein coating process.
(4) repeating step (3) twice again, the coated release-controlled composite fertilizer of Vegetable oil lipoprotein that to make total coating rate be 7.5wt%.Nutrient releasing curve diagram such as Fig. 4.
Embodiment 4, the coated release-controlled composite fertilizer of vegetables oil
(1) screening, weighing lion horse 40% (21-8-11) granulated fertilizer 1000kg are delivered to tablets press, are preheated to 50-60 ℃.
(2) configuration A component: 6.5kg vegetables oil, 0.65kg tetramethylolmethane, 2.93g YLENE, 0.33kg vegetable fibre stirring reaction 1.5h under 55-65 ℃ of condition in reaction kettle;
Configuration B component: the 7.4kg vegetables oil adds 2.2kg phthalic anhydride, 160 ℃ of following reaction kettle for reaction 2h.
A component and B component are mixed, be the agent of vegetables oil coating, subsequent use;
(3) the vegetables oil coating agent with step (2) is added on the granular urea in step (1) tablets press; Vegetables oil coating agent consumption is the 2wt% of the fertile weight of nuclear core; Keep 50 ~ 60 ℃ of fertilizer temperature, utilize the phase mutual friction of fertiliser granulates, Vegetable oil lipoprotein is uniform spreading on the fertiliser granulates surface of motion; Finally solidify to form the rete of smooth densification, accomplish one time the Vegetable oil lipoprotein coating process.
(4) repeating step (3) five times again, the coated release-controlled composite fertilizer of Vegetable oil lipoprotein that to make total coating rate be 12wt%.Nutrient releasing curve diagram such as Fig. 5.
The nutrient release experiment of controlled release fertilizer product of the present invention
Sample: the vegetables oil film-coated controlled release fertilizer product of embodiment 1-4 preparation.
Vegetables oil coating controlled-release fertilizer of the present invention meets slow release fertilizer GB/T 23348-2009 national standard that played enforcement on September 1st, 2009 and the release and release control fertilizer HG/T 4215-2011 industry standard requirement of implementing on July 1st, 2012, measuring method in the controlled release fertilizer nutrient release rate water:
Take by weighing the 10g fertilizer sample,, put into the pouch made from 100 order nylon gauzes and seal accurately to 0.01g; Pouch is put into the 250ml separating funnel, and adding distil water 250ml seals in the constant incubator that is placed on 25 ℃ then; Do 3 times parallel, do blank test simultaneously.Choose different fate sampling and measuring, reach 80% or surpass 80% up to nutrient cumulative release rate.
The fertilizer sample of embodiment 1 is in 1d, 3d, 7d, 14d, 28d, 42d, 56d sampling and measuring;
The fertilizer sample of embodiment 2 is in 1d, 3d, 7d, 14d, 28d, 56d, 84d sampling and measuring;
The fertilizer sample of embodiment 3 is in 1d, 3d, 7d, 14d, 28d, 56d, 84d, 113d, 140d, 168d sampling and measuring;
The fertilizer sample of embodiment 4 is in 1d, 3d, 7d, 14d, 28d, 56d, 84d, 113d, 140d, 168d, 196d, 224d, 252d sampling and measuring.
The result sees the nutrient release profiles of the controlled release fertilizer product of Fig. 2-5, and the Vegetable oil lipoprotein coating controlled-release fertilizer controlled release phase of embodiment 1-4 is about 2 months respectively, 3 months, 5 months, 9 months.
Claims (6)
1. a vegetable oil coating controlled-release fertilizer comprises that the nuclear core is fertile and is coated on the vegetables oil coating layer on the nuclear core fertilizer, and total coating rate is 2 ~ 12wt%, and described vegetables oil coating controlled-release fertilizer is the agent of vegetables oil coating to be coated on the nuclear core fertiliser granulates make; Wherein, used vegetables oil coating agent is made up of following A component and B component:
The A component: by weight, 18-22 part vegetables oil, 2-5 part polyvalent alcohol, 7-10 part YLENE, 1 part of vegetable fibre stirring reaction 0.8-2h under 55-65 ℃ of condition;
Said polyvalent alcohol is glycerine, tetramethylolmethane, TriMethylolPropane(TMP), Xylitol or sorbyl alcohol;
Said vegetable fibre is selected from one of rice husk, crop material, wood chip or combination;
The B component: by weight, 8-12 part vegetables oil adds 2-4 part polyprotonic acid or acid anhydrides, 110-180 ℃ of priming reaction 1-2h;
Said polyprotonic acid or acid anhydrides are selected from phthalic acid, m-phthalic acid, Tetra hydro Phthalic anhydride or phthalic anhydride.
2. vegetables oil coating controlled-release fertilizer as claimed in claim 1 is characterized in that said vegetables oil is selected from VT 18, oleum lini, tung oil or Oleum Gossypii semen.
3. vegetables oil coating controlled-release fertilizer as claimed in claim 1 is characterized in that said vegetables oil coating controlled-release fertilizer is a particulate state fertilizer, and its particle size range is 1.0 ~ 5.5mm.
4. vegetables oil coating controlled-release fertilizer as claimed in claim 1 is characterized in that the total coating rate of said vegetables oil coating controlled-release fertilizer is 4 ~ 8wt%.
5. vegetables oil coating controlled-release fertilizer as claimed in claim 1 is characterized in that the agent of said vegetables oil coating is made up of following A component and B component by weight:
A component: 20 parts of vegetables oil, 2 parts of polyvalent alcohols, 9 parts of YLENE, 1 part of vegetable fibre stirring reaction 0.8-2h under 55-65 ℃ of condition in reaction kettle;
Said polyvalent alcohol is glycerine or tetramethylolmethane;
Said vegetable fibre is selected from one of rice husk, crop material, wood chip or combination, fineness 120 ~ 200 orders;
The B component: 10 parts of vegetables oil add 2 parts of polyprotonic acids or acid anhydrides, priming reaction 1-2h in the 110-180 ℃ of following reaction kettle; Be weight part; Said polyprotonic acid or acid anhydrides are phthalic acid or phthalic anhydride.
6. the preparation technology of each described vegetables oil coating controlled-release fertilizer of claim 1-5 comprises that step is following:
(1) screening, weighing granulated fertilizer are delivered to tablets press as nuclear core fertilizer, are preheated to 50-60 ℃;
(2) configuration A component: with vegetables oil, polyvalent alcohol, YLENE, vegetable fibre stirring reaction 0.8-2h under 55-65 ℃ of condition in reaction kettle, make the A component by proportioning;
Configuration B component: by proportioning vegetables oil is added polyprotonic acid or acid anhydrides, priming reaction 1-2h in 110 ℃ of-180 ℃ of following reaction kettles makes the B component;
A component and B component are mixed, promptly get the agent of vegetables oil coating;
(3) the vegetables oil coating agent with step (2) is added on the granulated fertilizer in step (1) tablets press; Vegetables oil coating agent consumption is the 1-3wt% of the fertile weight of nuclear core; Keep 50 ~ 60 ℃ of granulated fertilizer temperature, utilize the phase mutual friction of fertiliser granulates, Vegetable oil lipoprotein is uniform spreading on the fertiliser granulates surface of motion; Solidify to form the rete of smooth densification then, accomplish one time the Vegetable oil lipoprotein coating;
(4) repeat above-mentioned steps (3),, promptly get until meeting the requirements of total coating rate.
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103304321A (en) * | 2013-06-19 | 2013-09-18 | 中农舜天生态肥业有限公司 | Environmental-friendly inorganic composite membrane controlled-release fertilizer and preparation method thereof |
| CN103539526A (en) * | 2013-09-29 | 2014-01-29 | 济南大学 | Slow-release chemical fertilizer with composite layer and preparation method thereof |
| CN106866265A (en) * | 2017-03-22 | 2017-06-20 | 中国石油大学(华东) | Pyrolysis bio-oils produce humic acid fertilizer bonding coating agent |
| CN109694282A (en) * | 2019-03-09 | 2019-04-30 | 陕西中德禾正生物科技有限公司 | A kind of Chinese medicine viable bacteria packet membrane controlled release organic-inorganic compound fertilizer and preparation method thereof |
| CN109704871A (en) * | 2019-03-09 | 2019-05-03 | 陕西中德禾正生物科技有限公司 | A kind of Chinese medicine viable bacteria packet membrane controlled release composite microbiological fertilizer and preparation method thereof |
| CN111454097A (en) * | 2020-03-09 | 2020-07-28 | 沃博特生物科技有限公司 | Special double-membrane controlled-release fertilizer for navel oranges and preparation method thereof |
| CN111454108A (en) * | 2020-03-09 | 2020-07-28 | 沃博特生物科技有限公司 | Special double-film controlled-release fertilizer for grapes and preparation method thereof |
| CN116640024A (en) * | 2023-06-14 | 2023-08-25 | 新洋丰农业科技股份有限公司 | Special fertilizer for rape in middle and downstream regions of Yangtze river and preparation method thereof |
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| CN101712578A (en) * | 2008-10-01 | 2010-05-26 | 南京理工大学 | Method for releasing actual effect of fertilizer, actual effect releasing type controlled release fertilizer and preparation method |
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| GB2305914A (en) * | 1995-10-06 | 1997-04-23 | Chown Peter A C | Slow release fertilizer |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103304321A (en) * | 2013-06-19 | 2013-09-18 | 中农舜天生态肥业有限公司 | Environmental-friendly inorganic composite membrane controlled-release fertilizer and preparation method thereof |
| CN103304321B (en) * | 2013-06-19 | 2015-04-08 | 中农舜天生态肥业有限公司 | Environmental-friendly inorganic composite membrane controlled-release fertilizer and preparation method thereof |
| CN103539526A (en) * | 2013-09-29 | 2014-01-29 | 济南大学 | Slow-release chemical fertilizer with composite layer and preparation method thereof |
| CN103539526B (en) * | 2013-09-29 | 2016-03-23 | 济南大学 | A kind of Slow-release chemical fertilizer with composite layer and preparation method thereof |
| CN106866265A (en) * | 2017-03-22 | 2017-06-20 | 中国石油大学(华东) | Pyrolysis bio-oils produce humic acid fertilizer bonding coating agent |
| CN109694282A (en) * | 2019-03-09 | 2019-04-30 | 陕西中德禾正生物科技有限公司 | A kind of Chinese medicine viable bacteria packet membrane controlled release organic-inorganic compound fertilizer and preparation method thereof |
| CN109704871A (en) * | 2019-03-09 | 2019-05-03 | 陕西中德禾正生物科技有限公司 | A kind of Chinese medicine viable bacteria packet membrane controlled release composite microbiological fertilizer and preparation method thereof |
| CN111454097A (en) * | 2020-03-09 | 2020-07-28 | 沃博特生物科技有限公司 | Special double-membrane controlled-release fertilizer for navel oranges and preparation method thereof |
| CN111454108A (en) * | 2020-03-09 | 2020-07-28 | 沃博特生物科技有限公司 | Special double-film controlled-release fertilizer for grapes and preparation method thereof |
| CN116640024A (en) * | 2023-06-14 | 2023-08-25 | 新洋丰农业科技股份有限公司 | Special fertilizer for rape in middle and downstream regions of Yangtze river and preparation method thereof |
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| CN102816008B (en) | 2014-01-29 |
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