CN108966926B - Old seedling raising device suitable for mechanical transplanting and application thereof - Google Patents
Old seedling raising device suitable for mechanical transplanting and application thereof Download PDFInfo
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- CN108966926B CN108966926B CN201810889703.2A CN201810889703A CN108966926B CN 108966926 B CN108966926 B CN 108966926B CN 201810889703 A CN201810889703 A CN 201810889703A CN 108966926 B CN108966926 B CN 108966926B
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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
- A01G9/00—Cultivation in receptacles, forcing-frames or greenhouses; Edging for beds, lawn or the like
- A01G9/02—Receptacles, e.g. flower-pots or boxes; Glasses for cultivating flowers
- A01G9/029—Receptacles for seedlings
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
- D21F11/00—Processes for making continuous lengths of paper, or of cardboard, or of wet web for fibre board production, on paper-making machines
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H11/00—Pulp or paper, comprising cellulose or lignocellulose fibres of natural origin only
- D21H11/12—Pulp from non-woody plants or crops, e.g. cotton, flax, straw, bagasse
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
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- D21H27/30—Multi-ply
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Abstract
The invention provides a seedling raising device suitable for machine-transplanted old seedlings and application thereof, belonging to the technical field of agricultural cultivation. The invention discloses a seedling raising device, which comprises a seedling raising tray, a substrate and seedling raising paper, wherein the seedling raising tray sequentially comprises the following components from top to bottom: the first seedling raising paper, the substrate layer, the first nutrition seedling raising paper and the second nutrition seedling raising paper. By adopting the seedling raising device, when the seedlings are 20 days old, the heights of the seedlings are lower than that of a control, the stem base widths, the leaf areas, the chlorophyll content, the overground parts and the dry weight average of the root systems of the seedlings are obviously increased, and the root-crown ratio, the disc-knot force of the root systems and the activity of the root systems are also greatly improved, so that the seedling raising device can obviously improve the quality of the seedlings. In addition, when the seedlings are aged for 30 days, the quality of the seedlings is also obviously higher than that of the control, and the height of the seedlings is obviously lower than that of the control, so that the seedlings are still suitable for mechanical transplanting. Therefore, the seedling raising method can prolong the suitable planting period of the seedlings. Meanwhile, the seedling raising method provided by the invention also reduces the using amount of the matrix, so that the cost can be saved for farmers, and the effect is improved.
Description
Technical Field
The invention belongs to the technical field of agricultural cultivation, and particularly relates to a seedling raising device for old seedlings suitable for mechanical transplanting and application thereof.
Background
Under the premise of current mechanized transplanting, it is also necessary to cultivate seedlings suitable for machine transplanting, and the requirements of machine transplanting on seedling age of the seedlings are strict. If the seedling age of the machine-transplanted rice is too long, the phenomena of seedling height increase, yellow leaf increase and rooting force reduction can occur, the improvement of the machine-transplanted quality is not facilitated, the seedling turning-green and survival are slow, tillering is influenced, field tillering starts late, effective tillering node positions are few, the formation of proper spike number required for high yield is further influenced, and the yield of the rice is reduced. Experiments show that the suitable transplanting age for raising the seedlings by the matrix is within 15-20 days, the cultivation is proper, the yield per mu can exceed that of a jack, but the yield is reduced by 1.4% when the transplanting age is prolonged by one day.
In recent years, in the aspect of seedling raising, due to the increasingly prominent problems of difficult soil taking, uneven mixing and stirring of nutrient soil and the like, the quality of seedlings is uneven, the seedling burning phenomenon is common, and the production of rice is seriously influenced. Therefore, the way of raising seedlings with nutrient soil is gradually replaced by raising seedlings with substrates. Although the matrix seedling raising has the advantages of simple technology, low cost, high success rate, suitability for mechanical transplanting and the like compared with the nutrient soil seedling raising, the matrix seedling raising also has the defects. Firstly, the fertilizer efficiency slow effect of the matrix seedling raising is short compared with that of nutrient soil, and seedlings are easy to lose fertilizer and turn yellow after 1 leaf and 1 heart; secondly, the physical properties of the matrix determine that the water retention of the matrix is poor, and the water management difficulty of the seedlings is increased; thirdly, if the substrate is decomposed and fermented insufficiently and is stirred unevenly, the phenomena of seedling burning, seedling death and the like are easily caused, and therefore the influence of seedling alignment and packing is large.
In the current rice production process, the condition that the maturation of the previous stubbles is delayed, the harvest time is delayed in rainy days, mechanical equipment is in failure and the like is often met, so that the transplanting cannot be carried out in the planning time, and the seedlings with the proper age cannot be transplanted.
Disclosure of Invention
In view of the above, the present invention aims to provide a seedling raising device for mechanically transplanted old seedlings and an application thereof in raising the old seedlings, wherein the seedling raising device can raise seedlings with high uniformity, strong stems and leaves and developed root systems, and the suitable age of the seedlings can be prolonged by 5-10 days.
In order to achieve the above object, the present invention provides the following technical solutions:
the invention provides a seedling raising device suitable for mechanical transplanting for old seedlings, which comprises a seedling raising tray, and a substrate and seedling raising paper loaded in the seedling raising tray, wherein the seedling raising paper comprises first seedling raising paper, first nutrition seedling raising paper and second nutrition seedling raising paper; the seedling raising tray sequentially comprises from top to bottom: the first seedling raising paper, the substrate layer, the first nutrition seedling raising paper and the second nutrition seedling raising paper;
the first nutrient seedling raising paper is soaked in a paclobutrazol mixed solution before use, and the paclobutrazol mixed solution comprises: n5-10 mg/mL, P2O53～6mg/mL、K2O 5～10mg/mL、Na2SiO33～6mg/mL、ZnSO41～5mg/mL、FeSO41～3mg/mL、MgSO41-3 mg/mL and paclobutrazol 0.1-0.3 mg/mL;
the second nutrient seedling raising paper is soaked in a sodium naphthalene acetate mixed solution before use, and the sodium naphthalene acetate mixed solution comprises: n5-10 mg/mL, P2O53～6mg/mL、K2O 5～10mg/mL、Na2SiO33～6mg/mL、ZnSO41～5mg/mL、FeSO41～3mg/mL、MgSO41-3 mg/mL and 0.05-0.1 mg/mL of sodium naphthaleneacetate.
Preferably, the first seedling raising paper comprises wood pulp soft paper.
Preferably, the preparation method of the first and second nutrient seedling raising papers comprises the following steps:
modifying wheat straws by using a potassium sulfate solution to obtain fiber gel;
mixing the fiber gel with water-absorbent resin, plastic-absorbing glue and a cross-linking agent to obtain a mixed homogenate;
and paving and forming the mixed homogenate and drying the homogenate into paper in sequence to obtain the nutritional seedling raising paper.
Preferably, the modification treatment comprises the following steps:
and soaking the wheat straws in a potassium sulfate solution, and cooking the soaked wheat straws to obtain the fiber gel.
Preferably, the mass concentration of the potassium sulfate solution is 4-8%.
Preferably, the soaking time is 6-8 days.
Preferably, the cooking time is 25-35 min.
Preferably, the mass concentration of the fiber gel in the mixed homogenate is 65% to 85%.
The invention also provides application of the seedling raising device in cultivating old seedlings suitable for mechanical transplanting.
Preferably, the application comprises: and paving second nutrition seedling raising paper and first nutrition seedling raising paper in the seedling raising tray, paving a substrate on the first nutrition seedling raising paper, sowing in the substrate, and covering the first seedling raising paper on the sowed substrate.
The invention provides a rice seedling raising device capable of being transplanted in a combining machine and application thereof, wherein the rice seedling raising device can be used for increasing the uniformity of rice seedlings, improving the seedling aligning and strengthening rate, and prolonging the suitable age of machine-transplanted rice seedlings by 5-10 days. The seedling raising device can reduce the usage amount of the matrix, reduce the risk of seedling burning and death caused by matrix seedling raising, and improve the production efficiency.
Drawings
FIG. 1 is a schematic view of a rice seedling raising paper of a rice seedling raising apparatus.
Detailed Description
The invention provides a seedling raising device suitable for mechanical transplanting for old seedlings, which comprises a seedling raising tray, and a substrate and seedling raising paper loaded in the seedling raising tray, wherein the seedling raising paper comprises first seedling raising paper, first nutrition seedling raising paper and second nutrition seedling raising paper; the seedling raising tray sequentially comprises from top to bottom: the first seedling raising paper, the substrate layer, the first nutrition seedling raising paper and the second nutrition seedling raising paper;
the first nutrient seedling raising paper is soaked in a paclobutrazol mixed solution before use, and the paclobutrazol mixed solution comprises: n5-10 mg/mL, P2O53～6mg/mL、K2O 5～10mg/mL、Na2SiO33～6mg/mL、ZnSO41～5mg/mL、FeSO41～3mg/mL、MgSO41-3 mg/mL and paclobutrazol 0.1-0.3 mg/mL;
the second nutrient seedling raising paper is soaked in a sodium naphthalene acetate mixed solution before use, and the sodium naphthalene acetate mixed solution comprises: n5-10 mg/mL, P2O53～6mg/mL、K2O 5～10mg/mL、Na2SiO33～6mg/mL、ZnSO41～5mg/mL、FeSO41～3mg/mL、MgSO41-3 mg/mL and 0.05-0.1 mg/mL of sodium naphthaleneacetate.
The seedling raising device comprises a seedling raising tray, and a substrate and seedling raising paper which are loaded in the seedling raising tray, wherein the seedling raising paper comprises first seedling raising paper, first nutrition seedling raising paper and second nutrition seedling raising paper. The seedling raising tray is not particularly limited, and is preferably a plastic soft tray for rice transplanting of a rice machine. In the seedling raising tray, first seedling raising paper, a substrate layer, first nutrition seedling raising paper and second nutrition seedling raising paper are sequentially laid and arranged from top to bottom as shown in figure 1. In the invention, the first seedling raising paper preferably comprises wood pulp soft paper, and the source and variety of the wood pulp soft paper are not particularly limited, and the wood pulp soft paper can be obtained by utilizing the conventional wood pulp soft paper in the field. The first seedling raising paper and the seedling raising tray are preferably the same in size. The first seedling raising paper disclosed by the invention is covered on the substrate, so that the effects of heat preservation and moisture preservation can be achieved. The substrate is not particularly limited in the invention, and is preferably a conventional rice seedling raising substrate in the field.
The first and second nutrient seedling raising papers are preferably seedling raising papers with the same source, and the preparation method of the first and second nutrient seedling raising papers comprises the following steps: modifying wheat straws by using a potassium sulfate solution to obtain fiber gel; mixing the fiber gel with water-absorbent resin, plastic-absorbing glue and a cross-linking agent to obtain a mixed homogenate; and paving and forming, drying to form paper, slitting and winding the mixed homogenate to obtain the nutritional seedling raising paper. When the nutritional seedling raising paper is prepared, the wheat straws are modified by adopting a potassium sulfate solution to obtain the fiber gel. In the invention, the wheat straws are preferably pretreated before use, and the pretreatment process is preferably to cut the wheat straws into segments with the length of 2-3 cm by a guillotine, so as to obtain the pretreated wheat straws for modification treatment. The source of the wheat straw is not specially limited, and the wheat straw with the source known by the technicians in the field can be selected.
In the present invention, the modification treatment preferably includes the steps of: and soaking the wheat straws in a potassium sulfate solution, and cooking the soaked wheat straws to obtain the fiber gel. In the invention, the mass concentration of the potassium sulfate solution is preferably 4-8%, and more preferably 5-6%; the soaking time is preferably 6-8 days, and more preferably 7 days. The invention can soften the straw ribs by soaking.
In the invention, the cooking time is preferably 25-35 min, and more preferably 30 min. The invention removes the impurities such as pectin, crude protein and the like adhered between fibers in the straws by cooking, so that the fibers are dispersed to form fiber gel.
After obtaining the fiber gel, the invention mixes the fiber gel with water-absorbent resin, plastic-absorbing glue and cross-linking agent to obtain mixed homogenate. The mixing is preferably carried out in a beating tank, the mixing mode is not particularly limited, and the fiber gel, the water-absorbent resin, the plastic uptake adhesive and the cross-linking agent can be uniformly mixed. In the embodiment of the invention, the mixing is carried out in a stirring mode, and the rotation speed of the stirring is preferably 450-550 r/min, and more preferably 500 r/min. In the present invention, the mass concentration of the fiber gel in the mixed homogenate is preferably 65% to 85%, more preferably 70% to 80%; the mass concentration of the water-absorbent resin in the mixed homogenate is preferably 2-10%, more preferably 5-8%; the mass concentration of the plastic absorbent in the mixed homogenate is preferably 3-7%, and more preferably 5-6%; the mass concentration of the crosslinking agent in the mixed homogenate is preferably 1% to 5%, more preferably 2% to 4%. In the present invention, the water absorbent resin is preferably sodium polyacrylate; the plastic absorbing plastic is preferably waterborne polyurethane; the crosslinking agent is preferably polyvinyl alcohol. The invention utilizes the combined action of the water-absorbing resin, the plastic-absorbing glue and the cross-linking agent to enhance the performances of the seedling raising paper such as water retention, heat preservation, toughness, strength and the like.
After the mixed homogenate is obtained, the mixed homogenate is sequentially paved, molded and dried to form paper, and the nutritional seedling raising paper is obtained. In the invention, the paving, forming and drying to form paper is to convey the mixed homogenate to an inclined wire former for forming treatment until the mixed homogenate is precipitated into raw pulp wet paper; after obtaining the virgin pulp wet paper, the invention preferably dries the virgin pulp wet paper at 100-120 ℃ until the water content of the virgin pulp wet paper is 10% -15%, thus obtaining the dried and molded virgin pulp paper. The method preferably further comprises slitting and winding after the formed raw stock paper is obtained, wherein the slitting and winding are preferably carried out by cutting into paper tapes with the width of 280-335 mm by a guillotine and then winding to obtain the seedling raising paper. When the seedling raising paper is actually used, the seedling raising paper can be cut into blocks according to the actual size of the seedling tray. The nutrient seedling raising paper prepared by the method can adsorb nutrient element liquid and a plant growth regulator, provides all nutrients required for growth and development of seedlings in the seedling raising process, can obviously improve the quality of the seedlings, solves the problems caused by difficult soil borrowing or uneven substrate fermentation, simultaneously has degradable materials as raw materials, is nontoxic and pollution-free to the environment, and can control the degradation time to be about 20-30 days.
The first nutrient seedling raising paper is soaked in a paclobutrazol mixed solution before use, and the paclobutrazol mixed solution comprises: n5-10 mg/mL, P2O53～6mg/mL、K2O 5～10mg/mL、Na2SiO33～6mg/mL、ZnSO41～5mg/mL、FeSO41～3mg/mL、MgSO41-3 mg/mL and paclobutrazol 0.1-0.3 mg/mL. The paclobutrazol mixed solution comprises N, and the concentration of the N in the paclobutrazol mixed solution is preferably 6-9, more preferably 6.5-8, and most preferably 7. The paclobutrazol mixed solution comprises P2O5Said P is2O5The concentration of the paclobutrazol in the mixed solution is preferably 3.6-5.5, more preferably 4-5, and most preferably 4.5. The paclobutrazol mixed solution comprises K2O, said K2The concentration of O in the paclobutrazol mixed solution is preferably 5.8-9.5, more preferably 6-9, and most preferably 7. The paclobutrazol mixed solution comprises Na2SiO3Said Na2SiO3The concentration of the paclobutrazol in the mixed solution is preferably 3.2-5.4, more preferably 4-5, and most preferably 4.5. The paclobutrazol mixed solution comprises ZnSO4Said ZnSO4The concentration of the paclobutrazol in the mixed solution is preferably 1.5-4.8, more preferably 2-4, and most preferably 3. The paclobutrazol mixed solution comprises FeSO4Said FeSO4The concentration of the paclobutrazol in the mixed solution is preferably 1.2-2.8, more preferably 1.5-2.5, and most preferably 2. The paclobutrazol mixed solution comprises MgSO4The MgSO of4At a plurality ofThe concentration of the azole mixture solution is preferably 1.3 to 2.6, more preferably 1.5 to 2.5, and most preferably 2. The mixed solution of the paclobutrazol comprises the paclobutrazol, and the concentration of the paclobutrazol in the mixed solution of the paclobutrazol is preferably 0.12-0.28, more preferably 0.15-0.25, and most preferably 0.2. The source of each component in the mixed solution of paclobutrazol is not particularly limited in the present invention, and conventional reagents in the field are used, and the paclobutrazol is preferably a paclobutrazol reagent with 15% of paclobutrazol as an effective component. The preparation method of the paclobutrazol mixed solution is not specially limited, the soaking method is not specially limited by utilizing the conventional solution preparation method in the field, and the first nutrient seedling raising paper is soaked and then dried. The first nutrition seedling raising paper can control the height of seedlings and promote the growth of the seedlings after being soaked.
Before use, the second nutrient seedling raising paper is soaked in a sodium naphthalene acetate mixed solution, wherein the sodium naphthalene acetate mixed solution comprises: n5-10 mg/mL, P2O53～6mg/mL、K2O 5～10mg/mL、Na2SiO33～6mg/mL、ZnSO41～5mg/mL、FeSO41～3mg/mL、MgSO41-3 mg/mL and 0.05-0.1 mg/mL of sodium naphthaleneacetate. The sodium naphthaleneacetate mixed solution comprises N, and the concentration of the N in the paclobutrazol mixed solution is preferably 5.5-9.8, more preferably 6-9, and most preferably 7. The sodium naphthalene acetate mixed solution comprises P2O5Said P is2O5The concentration of the sodium naphthaleneacetate mixed solution is preferably 3.2 to 5.5, more preferably 4 to 5, and most preferably 4.5. The sodium naphthalene acetate mixed solution comprises K2O, said K2The concentration of O in the sodium naphthalene acetate mixed solution is preferably 5.8-9.3, more preferably 6-9, and most preferably 7. The sodium naphthalene acetate mixed solution comprises Na2SiO3Said Na2SiO3The concentration of the sodium naphthaleneacetate mixed solution is preferably 3.4 to 5.6, more preferably 4 to 5, and most preferably 4.5. The sodium naphthalene acetate mixed solution comprises ZnSO4Said ZnSO4Mixing in sodium naphthaleneacetateThe concentration in the solution is preferably 1.8 to 4.5, more preferably 2 to 4, and most preferably 3. The sodium naphthalene acetate mixed solution comprises FeSO4Said FeSO4The concentration of the sodium naphthaleneacetate mixed solution is preferably 1.2 to 2.8, more preferably 1.5 to 2.5, and most preferably 2. The sodium naphthalene acetate mixed solution comprises MgSO4The MgSO of4The concentration of the sodium naphthaleneacetate mixed solution is preferably 1.3 to 2.9, more preferably 1.5 to 2.5, and most preferably 2. The sodium naphthylacetate mixed solution comprises sodium naphthylacetate, and the concentration of the sodium naphthylacetate in the sodium naphthylacetate mixed solution is preferably 0.058-0.095, more preferably 0.06-0.09, and most preferably 0.07. The sources of the components in the sodium naphthaleneacetate mixed solution are not particularly limited, and conventional reagents in the field can be utilized. The method for preparing the mixed solution of naphthylammonium acetate is not particularly limited in the present invention, and a conventional solution preparation method in the art may be used. The method for soaking is not specially limited, and the second nutrition seedling raising paper is soaked and then dried. The second nutrition seedling raising paper can promote the seedling to take root and pack after being soaked.
The invention also provides application of the seedling raising device in cultivating old seedlings suitable for mechanical transplanting.
When the seedling raising device is used for raising seedlings of old seedlings, the second nutrition seedling raising paper and the first nutrition seedling raising paper are laid in the seedling raising tray, the substrate is laid on the first nutrition seedling raising paper, the seeding is carried out in the substrate, and the first seedling raising paper is covered on the seeded substrate. In the embodiment of the invention, the seedling raising device is a seedling raising soft disc, the size of the seedling raising soft disc is 58cm multiplied by 28cm multiplied by 3cm, the first seedling raising paper, the first nutrition seedling raising paper and the second nutrition seedling raising paper are cut into the size equivalent to that of the seedling raising disc, the second nutrition seedling raising paper is paved at the bottom of the seedling raising disc, the first nutrition seedling raising paper is paved on the second nutrition seedling raising paper, 1.5kg of matrix is paved on the first nutrition seedling raising paper, and the first seedling raising paper is paved on the matrix. In the present invention, the substrate is seeded, the seeding method and the seeding amount are not particularly limited, and preferably, the seeded seed is subjected to germination acceleration. The accelerating germination of the invention preferably comprises soaking for 24h at 25 ℃, spreading and drying in the air to smelt the bud.
The following detailed description of the seedling raising device suitable for mechanical transplanting and its application will be made with reference to the following examples, which should not be construed as limiting the scope of the present invention.
Example 1
Cutting wheat straws into segments with the length of 2cm by a guillotine, and then soaking the segments in a potassium sulfate solution with the concentration of 4% for 7 days; and then putting the soaked wheat straws in a pot for steaming and boiling for 30min to obtain the fiber gel. Putting the fiber gel into a beating tank, enabling the mass concentration of the fiber gel in the tank to reach 65%, then respectively adding sodium polyacrylate, waterborne polyurethane and polyvinyl alcohol, and uniformly stirring; the mass concentration of the three components in the homogenate reaches 2%, 3% and 1% in sequence to obtain mixed homogenate; conveying the mixed homogenate to an inclined wire former for forming treatment until the mixed homogenate is precipitated into raw pulp wet paper, and drying the raw pulp wet paper at 100 ℃ to ensure that the water content of the raw pulp wet paper is 15% to obtain dried and formed raw pulp paper; cutting the dried and formed raw stock paper into paper tapes with the width of 280mm by a guillotine, and then winding to form the nutrient seedling raising paper.
Weighing 0.5g N, 0.3g P2O5，0.5g k2O，0.3g Na2SiO3，0.1g ZnSO4，0.1g FeSO4，0.1gMgSO4And dissolved in 50ml of water to prepare a solution A.
10mg of paclobutrazol with a content of 15% is weighed and dissolved in 50ml of water to prepare a solution B.
5mg of sodium naphthaleneacetate was weighed out and dissolved in 50ml of water to prepare a solution C.
And mixing the solution A and the solution B, adding water to a constant volume of 100ml, uniformly stirring, uniformly spraying the mixture on the nutrient seedling raising paper, and airing to obtain the first nutrient seedling raising paper.
And mixing the solution A and the solution C, adding water to a constant volume of 100ml, uniformly stirring, uniformly spraying the mixture on the nutrient seedling raising paper, and airing to obtain second nutrient seedling raising paper.
Spreading the second and first nutrition seedling raising papers on a seedling raising tray to a thickness of 1.5kg, spreading a seedling raising substrate, and sowing the rice seeds subjected to germination acceleration (soaking for 24h at 25 ℃, accelerating germination, spreading and airing for hardening the sprouts and then sowing) with a sowing amount of 114g dry rice/tray;
the size of the wood pulp soft paper is cut to be consistent with that of the seedling raising soft disc, and the wood pulp soft paper is covered on the substrate.
Sprinkling water once every morning and evening, when seedling age is 20 days, leaf age is 4.5 leaves, seedling height is 13.26cm, stem base width is 0.382cm, leaf area is 3.362cm2The chlorophyll content is 2.846mg/gFW, the dry weight of the overground part is 2.96 g/hundred plants, the dry weight of the root system is 1.12 g/hundred plants, the root-crown ratio is 0.378, the disc bearing capacity of the root system is 29.14N/block, and the root activity is 48.59ug-1.h-1(ii) a When the seedling age is 30 days, the leaf age is 5 leaves, the seedling height is 16.76cm, the stem base width is 0.392cm, and the leaf area is 3.765cm2The chlorophyll content is 3.874mg/g FW, the dry weight of the overground part is 5.78 g/hundred plants, the dry weight of the root system is 1.42 g/hundred plants, the root-crown ratio is 0.246, the disc root strength of the root system is 42.58N/block, and the root activity is 49.64ug.g-1.h-1。
Example 2
Cutting wheat straws into segments with the length of 2cm by a guillotine, and then soaking the segments in a potassium sulfate solution with the concentration of 4% for 7 days; and then putting the soaked wheat straws in a pot for steaming and boiling for 30min to obtain the fiber gel. Putting the fiber gel into a beating tank, enabling the mass concentration of the fiber gel in the tank to reach 65%, then respectively adding sodium polyacrylate, waterborne polyurethane and polyvinyl alcohol, and uniformly stirring; the mass concentration of the three components in the homogenate reaches 2%, 3% and 1% in sequence to obtain mixed homogenate; conveying the mixed homogenate to an inclined wire former for forming treatment until the mixed homogenate is precipitated into raw pulp wet paper, and drying the raw pulp wet paper at 100 ℃ to ensure that the water content of the raw pulp wet paper is 15% to obtain dried and formed raw pulp paper; cutting the dried and formed raw stock paper into paper tapes with the width of 280mm by a guillotine, and then winding to form the nutrient seedling raising paper.
Weigh 0.6g N, 0.4g P2O5，0.6g K2O，0.4g Na2SiO3，0.2g ZnSO4，0.2g FeSO4，0.2gMgSO4Dissolving in 50ml water to obtain solution A;
weighing 15mg of paclobutrazol with the content of 15 percent, and dissolving the paclobutrazol in 50ml of water to prepare a solution B;
weighing 6mg of sodium naphthalene acetate, and dissolving in 50ml of water to prepare a solution C;
and mixing the solution A and the solution B, adding water to a constant volume of 100ml, uniformly stirring, uniformly spraying the mixture on the nutrient seedling raising paper, and airing to obtain the first nutrient seedling raising paper.
And mixing the solution A and the solution C, adding water to a constant volume of 100ml, uniformly stirring, uniformly spraying the mixture on novel seedling raising paper, and airing to obtain second nutritional seedling raising paper.
Spreading the second and first nutrition seedling raising papers on a seedling raising tray to a thickness of 1.5kg, spreading a seedling raising substrate, and sowing the rice seeds subjected to germination acceleration (soaking for 24h at 25 ℃, accelerating germination, spreading and airing for hardening the sprouts and then sowing) with a sowing amount of 114g dry rice/tray;
the size of the wood pulp soft paper is cut to be consistent with that of the seedling raising soft disc, and the wood pulp soft paper is covered on the substrate.
Sprinkling water once every morning and evening, when seedling age is 20 days, leaf age is 4.5 leaves, seedling height is 13.36cm, stem base width is 0.379cm, leaf area is 3.042cm2The chlorophyll content is 2.878mg/g FW, the dry weight of the overground part is 3.02 g/hundred plants, the dry weight of the root system is 1.08 g/hundred plants, the root-crown ratio is 0.358, the disc bearing capacity of the root system is 29.78N/block, and the root activity is 47.32ug-1.h-1(ii) a When the seedling age is 30 days, the leaf age is 5 leaves, the seedling height is 16.53cm, the stem base width is 0.397cm, and the leaf area is 3.842cm2The chlorophyll content is 3.924mg/g FW, the dry weight of the overground part is 5.84 g/hundred plants, the dry weight of the root system is 1.47 g/hundred plants, the root crown ratio is 0.252, the disc bearing capacity of the root system is 43.12N/block, and the root activity is 49.67ug.g-1.h-1。
Example 3
Cutting wheat straws into segments with the length of 3cm by a guillotine, and then soaking the segments in a potassium sulfate solution with the concentration of 6% for 7 days; and then putting the soaked wheat straws in a pot for steaming and boiling for 30min to obtain the fiber gel. Putting the fiber gel into a beating tank, enabling the mass concentration of the fiber gel in the tank to reach 75%, then respectively adding sodium polyacrylate, waterborne polyurethane and polyvinyl alcohol, and uniformly stirring; the mass concentration of the three components in the homogenate reaches 4%, 5% and 3% in sequence to obtain mixed homogenate; conveying the mixed homogenate to an inclined wire former for forming treatment until the mixed homogenate is precipitated into raw pulp wet paper, and drying the raw pulp wet paper at 110 ℃ to ensure that the water content of the raw pulp wet paper is 12 percent, thereby obtaining the dried and formed raw pulp paper; cutting the dried and molded raw stock paper into paper tapes with the width of 300mm by a guillotine, and then winding to obtain the nutritional seedling raising paper.
Weigh 0.7g N, 0.5g P2O5，0.7g K2O，0.5g Na2SiO3，0.3g ZnSO4，0.3g FeSO4，0.3gMgSO4Dissolving in 50ml water to obtain solution A;
weighing 20mg of paclobutrazol with the content of 15 percent, and dissolving the paclobutrazol in 50ml of water to prepare a solution B;
weighing 7mg of sodium naphthalene acetate, and dissolving in 50ml of water to prepare a solution C;
and mixing the solution A and the solution B, adding water to a constant volume of 100ml, uniformly stirring, uniformly spraying the mixture on the nutrient seedling raising paper, and airing to obtain the first nutrient seedling raising paper.
And mixing the solution A and the solution C, adding water to a constant volume of 100ml, uniformly stirring, uniformly spraying the mixture on the nutrient seedling raising paper, and airing to obtain second nutrient seedling raising paper.
Spreading the second and first nutrition seedling raising papers on a seedling raising tray to a thickness of 1.5kg, spreading a seedling raising substrate, and sowing the rice seeds subjected to germination acceleration (soaking for 24h at 25 ℃, accelerating germination, spreading and airing for hardening the sprouts and then sowing) with a sowing amount of 114g dry rice/tray;
the size of the wood pulp soft paper is cut to be consistent with that of the seedling raising soft disc, and the wood pulp soft paper is covered on the substrate.
Sprinkling water once every morning and evening, when seedling age is 20 days, leaf age is 4.5 leaves, seedling height is 13.30cm, stem base width is 0.373cm, leaf area is 3.141cm2Chlorophyll content of 2.793mg/g FW, overground part dry weight of 2.82 g/hundred plants, root system dry weight of 1.04 g/hundred plants, root-crown ratio of 0.369, root system disc bearing capacity of 30.62N/block, and root system activity of 47.44ug-1.h-1(ii) a When the seedling ages are 30 days, the leaf age is 5 leaves, the seedling height is 16.78cm, and the stem base width is 0.403cm, leaf area 3.921cm2The chlorophyll content is 3.863mg/g FW, the dry weight of the overground part is 5.87 g/hundred plants, the dry weight of the root system is 1.53 g/hundred plants, the root-crown ratio is 0.261, the disc bearing capacity of the root system is 42.37N/block, and the root activity is 49.33ug-1.h-1。
Example 4
Cutting wheat straws into segments with the length of 3cm by a guillotine, and then soaking the segments in a potassium sulfate solution with the concentration of 6% for 7 days; and then putting the soaked wheat straws in a pot for steaming and boiling for 30min to obtain the fiber gel. Putting the fiber gel into a beating tank, enabling the mass concentration of the fiber gel in the tank to reach 75%, then respectively adding sodium polyacrylate, waterborne polyurethane and polyvinyl alcohol, and uniformly stirring; the mass concentration of the three components in the homogenate reaches 4%, 5% and 3% in sequence to obtain mixed homogenate; conveying the mixed homogenate to an inclined wire former for forming treatment until the mixed homogenate is precipitated into raw pulp wet paper, and drying the raw pulp wet paper at 110 ℃ to ensure that the water content of the raw pulp wet paper is 12 percent, thereby obtaining the dried and formed raw pulp paper; cutting the dried and molded raw stock paper into paper tapes with the width of 300mm by a guillotine, and then winding to obtain the nutritional seedling raising paper.
Weigh 0.8g N, 0.6gP2O5，0.8g K2O，0.6g Na2SiO3，0.4g ZnSO4，0.1g FeSO4，0.1gMgSO4Dissolving in 50ml water to obtain solution A;
weighing 25mg of paclobutrazol with the content of 15 percent, and dissolving the paclobutrazol in 50ml of water to prepare a solution B;
weighing 8mg of sodium naphthalene acetate, and dissolving in 50ml of water to prepare a solution C;
and mixing the solution A and the solution B, adding water to a constant volume of 100ml, uniformly stirring, uniformly spraying the mixture on the nutrient seedling raising paper, and airing to obtain the first nutrient seedling raising paper.
And mixing the solution A and the solution C, adding water to a constant volume of 100ml, uniformly stirring, uniformly spraying the mixture on the nutrient seedling raising paper, and airing to obtain second nutrient seedling raising paper.
Spreading the second and first nutrition seedling raising papers on a seedling raising tray to a thickness of 1.5kg, spreading a seedling raising substrate, and sowing the rice seeds subjected to germination acceleration (soaking for 24h at 25 ℃, accelerating germination, spreading and airing for hardening the sprouts and then sowing) with a sowing amount of 114g dry rice/tray;
the size of the wood pulp soft paper is cut to be consistent with that of the seedling raising soft disc, and the wood pulp soft paper is covered on the substrate.
Sprinkling water once every morning and evening, when seedling age is 20 days, leaf age is 4.5 leaves, seedling height is 13.27cm, stem base width is 0.385cm, leaf area is 3.217cm2The chlorophyll content is 2.751mg/g FW, the dry weight of the overground part is 2.97 g/hundred plants, the dry weight of the root system is 1.13 g/hundred plants, the root-crown ratio is 0.380, the disc bearing capacity of the root system is 29.65N/block, and the root activity is 47.23ug-1.h-1(ii) a When the seedling age is 30 days, the leaf age is 5 leaves, the seedling height is 16.84cm, the stem base width is 0.405cm, and the leaf area is 3.873cm2Chlorophyll content 3.852mg/g FW, overground part dry weight 5.82 g/hundred plants, root system dry weight 1.55 g/hundred plants, root cap ratio 0.266, root disc bearing capacity 42.69N/block, root system activity 49.52ug.g-1.h-1。
Example 5
Cutting wheat straws into segments with the length of 2cm by a guillotine, and then soaking the segments in 8% potassium sulfate solution for 7 days; and then putting the soaked wheat straws in a pot for steaming and boiling for 30min to obtain the fiber gel. Putting the fiber gel into a beating tank, enabling the mass concentration of the fiber gel in the tank to reach 85%, then respectively adding sodium polyacrylate, waterborne polyurethane and polyvinyl alcohol, and uniformly stirring; the mass concentration of the three components in the homogenate reaches 10%, 7% and 5% in sequence to obtain mixed homogenate; conveying the mixed homogenate to an inclined wire former for forming treatment until the mixed homogenate is precipitated into raw pulp wet paper, and drying the raw pulp wet paper at 120 ℃ to ensure that the water content of the raw pulp wet paper is 10 percent to obtain dried and formed raw pulp paper; and cutting the dried and formed raw stock paper into paper tapes with the width of 335mm by a guillotine, and then winding to form the nutritional seedling raising paper.
Weigh 0.9g N, 0.3g P2O5，0.9g K2O，0.3g Na2SiO3，0.5g ZnSO4，0.2g FeSO4，0.2gMgSO4Dissolving in 50ml water to obtain solution A;
weighing 30mg of paclobutrazol with the content of 15 percent, and dissolving the paclobutrazol in 50ml of water to prepare a solution B;
weighing 9mg of sodium naphthalene acetate, and dissolving in 50ml of water to prepare a solution C;
and mixing the solution A and the solution B, adding water to a constant volume of 100ml, uniformly stirring, uniformly spraying the mixture on the nutrient seedling raising paper, and airing to obtain the first nutrient seedling raising paper.
And mixing the solution A and the solution C, adding water to a constant volume of 100ml, uniformly stirring, uniformly spraying the mixture on the nutrient seedling raising paper, and airing to obtain second nutrient seedling raising paper.
Spreading the second and first nutrition seedling raising papers on a seedling raising tray to a thickness of 1.5kg, spreading a seedling raising substrate, and sowing the rice seeds subjected to germination acceleration (soaking for 24h at 25 ℃, accelerating germination, spreading and airing for hardening the sprouts and then sowing) with a sowing amount of 114g dry rice/tray;
the size of the wood pulp soft paper is cut to be consistent with that of the seedling raising soft disc, and the wood pulp soft paper is covered on the substrate.
Sprinkling water once every morning and evening, when seedling age is 20 days, leaf age is 4.5, seedling height is 13.41cm, stem base width is 0.376cm, and leaf area is 3.168cm2The chlorophyll content is 2.827mg/g FW, the overground part dry weight is 2.92 g/hundred plants, the root system dry weight is 1.06 g/hundred plants, the root-crown ratio is 0.363, the root system disc bearing capacity is 29.33N/block, and the root system activity is 47.36ug-1.h-1(ii) a When the seedling age is 30 days, the leaf age is 5 leaves, the seedling height is 16.95cm, the stem base width is 0.388cm, and the leaf area is 3.884cm2The chlorophyll content is 3.831mg/g FW, the dry weight of the overground part is 5.76 g/hundred plants, the dry weight of the root system is 1.48 g/hundred plants, the root-crown ratio is 0.257, the disc root strength of the root system is 43.03N/block, and the root activity is 49.63ug.g-1.h-1。
Example 6
Cutting wheat straws into segments with the length of 2cm by a guillotine, and then soaking the segments in 8% potassium sulfate solution for 7 days; and then putting the soaked wheat straws in a pot for steaming and boiling for 30min to obtain the fiber gel. Putting the fiber gel into a beating tank, enabling the mass concentration of the fiber gel in the tank to reach 85%, then respectively adding sodium polyacrylate, waterborne polyurethane and polyvinyl alcohol, and uniformly stirring; the mass concentration of the three components in the homogenate reaches 10%, 7% and 5% in sequence to obtain mixed homogenate; conveying the mixed homogenate to an inclined wire former for forming treatment until the mixed homogenate is precipitated into raw pulp wet paper, and drying the raw pulp wet paper at 120 ℃ to ensure that the water content of the raw pulp wet paper is 10 percent to obtain dried and formed raw pulp paper; and cutting the dried and formed raw stock paper into paper tapes with the width of 335mm by a guillotine, and then winding to form the nutritional seedling raising paper.
Weighing 1g N, 0.4g P2O5，1g K2O，0.4g Na2SiO3，0.1g ZnSO4，0.3g FeSO4，0.3g MgSO4Dissolving in 50ml water to obtain solution A;
weighing 10mg of paclobutrazol with the content of 15 percent, and dissolving the paclobutrazol in 50ml of water to prepare a solution B;
weighing 10mg of sodium naphthalene acetate, and dissolving in 50ml of water to prepare a solution C;
and mixing the solution A and the solution B, adding water to a constant volume of 100ml, uniformly stirring, uniformly spraying the mixture on the nutrient seedling raising paper, and airing to obtain the first nutrient seedling raising paper.
And mixing the solution A and the solution C, adding water to a constant volume of 100ml, uniformly stirring, uniformly spraying the mixture on the nutrient seedling raising paper, and airing to obtain second nutrient seedling raising paper.
Spreading the second and first nutrition seedling raising papers on a seedling raising tray to a thickness of 1.5kg, spreading a seedling raising substrate, and sowing the rice seeds subjected to germination acceleration (soaking for 24h at 25 ℃, accelerating germination, spreading and airing for hardening the sprouts and then sowing) with a sowing amount of 114g dry rice/tray;
the size of the wood pulp soft paper is cut to be consistent with that of the seedling raising soft disc, and the wood pulp soft paper is covered on the substrate.
Sprinkling water once every morning and evening, when seedling age is 20 days, leaf age is 4.5 leaves, seedling height is 13.35cm, stem base width is 0.377cm, leaf area is 3.172cm2Chlorophyll content 2.934mg/g FW, overground part dry weight 2.86 g/hundred plants, root system dry weight 1.06 g/hundred plants, root-crown ratio 0.371, root system disc bearing capacity 30.25N/block, root system activity 48.25ug.g-1.h-1(ii) a When the seedling age is 30 days, the leaf age is 5 leaves, the seedling height is 16.93cm, the stem base width is 0.395cm, and the leaf area is 3.851cm2Chlorophyll content 3.867mg/g FW, groundThe dry weight of the root is 5.89 g/hundred plants, the dry weight of the root is 1.57 g/hundred plants, the root cap ratio is 0.267, the disc bearing capacity of the root is 42.71N/block, and the activity of the root is 49.82ug.g-1.h-1。
Example 7
Cutting wheat straws into segments with the length of 3cm by a guillotine, and then soaking the segments in a potassium sulfate solution with the concentration of 6% for 7 days; and then putting the soaked wheat straws in a pot for steaming and boiling for 30min to obtain the fiber gel. Putting the fiber gel into a beating tank, enabling the mass concentration of the fiber gel in the tank to reach 75%, then respectively adding sodium polyacrylate, waterborne polyurethane and polyvinyl alcohol, and uniformly stirring; the mass concentration of the three components in the homogenate reaches 4%, 5% and 3% in sequence to obtain mixed homogenate; conveying the mixed homogenate to an inclined wire former for forming treatment until the mixed homogenate is precipitated into raw pulp wet paper, and drying the raw pulp wet paper at 110 ℃ to ensure that the water content of the raw pulp wet paper is 12 percent, thereby obtaining the dried and formed raw pulp paper; cutting the dried and molded raw stock paper into paper tapes with the width of 300mm by a guillotine, and then winding to obtain the nutritional seedling raising paper.
Weigh 0.5g N, 0.5g P2O5，0.5g K2O，0.5g Na2SiO3，0.2g ZnSO4，0.1g FeSO4，0.1gMgSO4Dissolving in 50ml water to obtain solution A;
weighing 15mg of paclobutrazol with the content of 15 percent, and dissolving the paclobutrazol in 50ml of water to prepare a solution B;
weighing 5mg of sodium naphthalene acetate, and dissolving in 50ml of water to prepare a solution C;
and mixing the solution A and the solution B, adding water to a constant volume of 100ml, uniformly stirring, uniformly spraying the mixture on the nutrient seedling raising paper, and airing to obtain the first nutrient seedling raising paper.
And mixing the solution A and the solution C, adding water to a constant volume of 100ml, uniformly stirring, uniformly spraying the mixture on the nutrient seedling raising paper, and airing to obtain second nutrient seedling raising paper.
Spreading the second and first nutrition seedling raising papers on a seedling raising tray to a thickness of 1.5kg, spreading a seedling raising substrate, and sowing the rice seeds subjected to germination acceleration (soaking for 24h at 25 ℃, accelerating germination, spreading and airing for hardening the sprouts and then sowing) with a sowing amount of 114g dry rice/tray;
the size of the wood pulp soft paper is cut to be consistent with that of the seedling raising soft disc, and the wood pulp soft paper is covered on the substrate.
Sprinkling water once every morning and evening, when seedling age is 20 days, leaf age is 4.5 leaves, seedling height is 13.33cm, stem base width is 0.362cm, and leaf area is 3.213cm2Chlorophyll content of 2.882mg/g FW, overground part dry weight of 2.84 g/hundred plants, root system dry weight of 1.11 g/hundred plants, root-crown ratio of 0.391, root system disc binding force of 30.14N/block, and root system activity of 48.32ug.g-1.h-1(ii) a When the seedling age is 30 days, the leaf age is 5 leaves, the seedling height is 16.87cm, the stem base width is 0.394cm, and the leaf area is 3.924cm2The chlorophyll content is 3.914mg/g FW, the dry weight of the overground part is 5.91 g/hundred plants, the dry weight of the root system is 1.56 g/hundred plants, the root-crown ratio is 0.264, the disc bearing capacity of the root system is 42.75N/block, and the root activity is 49.87ug.g-1.h-1。
Example 8
Cutting wheat straws into segments with the length of 2cm by a guillotine, and then soaking the segments in a potassium sulfate solution with the concentration of 4% for 7 days; and then putting the soaked wheat straws in a pot for steaming and boiling for 30min to obtain the fiber gel. Putting the fiber gel into a beating tank, enabling the mass concentration of the fiber gel in the tank to reach 65%, then respectively adding sodium polyacrylate, waterborne polyurethane and polyvinyl alcohol, and uniformly stirring; the mass concentration of the three components in the homogenate reaches 2%, 3% and 1% in sequence to obtain mixed homogenate; conveying the mixed homogenate to an inclined wire former for forming treatment until the mixed homogenate is precipitated into raw pulp wet paper, and drying the raw pulp wet paper at 100 ℃ to ensure that the water content of the raw pulp wet paper is 15% to obtain dried and formed raw pulp paper; cutting the dried and formed raw stock paper into paper tapes with the width of 280mm by a guillotine, and then winding to form the nutrient seedling raising paper.
Weighing 1g N, 0.6g P2O5，1g K2O，0.6g Na2SiO3，0.5g ZnSO4，0.3g FeSO4，0.3g MgSO4Dissolving in 50ml water to obtain solution A;
weighing 30mg of paclobutrazol with the content of 15 percent, and dissolving the paclobutrazol in 50ml of water to prepare a solution B;
weighing 10mg of sodium naphthalene acetate, and dissolving in 50ml of water to prepare a solution C;
and mixing the solution A and the solution B, adding water to a constant volume of 100ml, uniformly stirring, uniformly spraying the mixture on the nutrient seedling raising paper, and airing to obtain the first nutrient seedling raising paper.
And mixing the solution A and the solution C, adding water to a constant volume of 100ml, uniformly stirring, uniformly spraying the mixture on the nutrient seedling raising paper, and airing to obtain second nutrient seedling raising paper.
Spreading the second and first nutrition seedling raising papers on a seedling raising tray to a thickness of 1.5kg, spreading a seedling raising substrate, and sowing the rice seeds subjected to germination acceleration (soaking for 24h at 25 ℃, accelerating germination, spreading and airing for hardening the sprouts and then sowing) with a sowing amount of 114g dry rice/tray;
the size of the wood pulp soft paper is cut to be consistent with that of the seedling raising soft disc, and the wood pulp soft paper is covered on the substrate.
Sprinkling water once every morning and evening, when seedling age is 20 days, leaf age is 4.5, seedling height is 13.38cm, stem base width is 0.368cm, leaf area is 3.256cm2The chlorophyll content is 2.876mg/g FW, the dry weight of the overground part is 2.93 g/hundred plants, the dry weight of the root system is 1.09 g/hundred plants, the root-crown ratio is 0.372, the disc bearing capacity of the root system is 30.02N/block, and the root system activity is 48.14ug.g-1.h-1(ii) a When the seedling age is 30 days, the leaf age is 5 leaves, the seedling height is 16.95cm, the stem base width is 0.390cm, and the leaf area is 3.865cm2The chlorophyll content is 3.905mg/g FW, the dry weight of the overground part is 5.85 g/hundred plants, the dry weight of the root system is 1.51 g/hundred plants, the root-crown ratio is 0.258, the disc bearing capacity of the root system is 42.83N/block, and the root activity is 49.74ug.g-1.h-1。
Comparative example
2.5Kg of matrix is filled in the same seedling raising soft disc, and then the rice seeds subjected to germination acceleration (soaking for 24h at 25 ℃, accelerating germination, spreading and drying for bud refining and then sowing) are sowed, wherein the sowing amount is 114g dry rice/disc. Watering thoroughly before sowing, keeping moist before emergence of seedlings, watering in the morning and evening after emergence of seedlings to keep seedling tray moist, when seedling age is 20 days, leaf age is 4.5, seedling height is 13.94cm, stem base width is 0.343cm, leaf area is 2.986cm2Chlorophyll content of 2.313mg/g FW, overground part dry weight of 2.74 g/hundred plants, root system dry weight of 0.95 g/hundred plants, root-crown ratio of 0.346, root system disc strength of 28.45N/block, root systemVitality is 45.37ug.g-1.h-1(ii) a When the seedling age is 30 days, the leaf age is 5 leaves, the seedling height is 20.32cm, the stem base width is 0.376cm, and the leaf area is 3.825cm2Chlorophyll content of 3.412mg/g FW, overground part dry weight of 5.62 g/hundred plants, root system dry weight of 1.22 g/hundred plants, root-crown ratio of 0.217, root system disc bearing capacity of 38.54N/block, and root system activity of 48.36ug.g-1.h-1。
According to the embodiment and the comparative example, the invention provides the seedling raising device suitable for the machine-transplanted old seedlings and the application thereof, when the seedlings are 20 days old, the heights of the seedlings are lower than the contrast, the stem base widths, the leaf areas, the chlorophyll contents, the overground parts and the root system dry weight average of the seedlings are obviously increased, the root-crown ratio, the disc-knot strength of the root system and the root system activity are also greatly improved, and the seedling raising device can obviously improve the seedling quality. In addition, when the seedlings are aged for 30 days, the quality of the seedlings is also obviously higher than that of the control, and the height of the seedlings is obviously lower than that of the control, so that the seedlings are still suitable for mechanical transplanting. Therefore, the seedling raising method can prolong the suitable planting period of the seedlings. Meanwhile, the seedling raising method provided by the invention also reduces the using amount of the matrix, so that the cost can be saved for farmers, and the effect is improved.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (3)
1. A seedling raising device suitable for machine transplanting of old seedlings comprises a seedling raising tray, a substrate and seedling raising paper, wherein the substrate and the seedling raising paper are loaded in the seedling raising tray, and the seedling raising paper comprises first seedling raising paper, first nutrition seedling raising paper and second nutrition seedling raising paper; the seedling raising tray sequentially comprises from top to bottom: the first seedling raising paper, the substrate layer, the first nutrition seedling raising paper and the second nutrition seedling raising paper;
the first nutrient seedling raising paper is soaked in a paclobutrazol mixed solution before use, and the paclobutrazol mixed solution comprises: n5-10 mg/mL, P2O53～6mg/mL、K2O 5～10mg/mL、Na2SiO33～6mg/mL、ZnSO41～5mg/mL、FeSO41～3mg/mL、MgSO41-3 mg/mL and paclobutrazol 0.1-0.3 mg/mL;
the second nutrient seedling raising paper is soaked in a sodium naphthalene acetate mixed solution before use, and the sodium naphthalene acetate mixed solution comprises: n5-10 mg/mL, P2O53～6mg/mL、K2O 5～10mg/mL、Na2SiO33～6mg/mL、ZnSO41～5mg/mL、FeSO41～3mg/mL、MgSO41-3 mg/mL and 0.05-0.1 mg/mL of sodium naphthaleneacetate;
the first seedling raising paper comprises wood pulp soft paper;
the preparation method of the first and second nutrient seedling raising papers comprises the following steps:
modifying wheat straws by using a potassium sulfate solution to obtain fiber gel;
mixing the fiber gel with water-absorbent resin, plastic-absorbing glue and a cross-linking agent to obtain a mixed homogenate;
sequentially paving and forming the mixed homogenate and drying the homogenate into paper to obtain the nutrient seedling raising paper;
the modification treatment comprises the following steps: soaking wheat straws in a potassium sulfate solution, and cooking the soaked wheat straws to obtain fiber gel;
the mass concentration of the potassium sulfate solution is 4-8%;
the soaking time is 6-8 days;
the cooking time is 25-35 min;
the mass concentration of the fiber gel in the mixed homogenate is 65-85%.
2. Use of the seedling raising device as claimed in claim 1 for raising seedlings of old age suitable for mechanical transplanting.
3. The application of claim 2, wherein the application comprises: and paving second nutrition seedling raising paper and first nutrition seedling raising paper in the seedling raising tray, paving a substrate on the first nutrition seedling raising paper, sowing in the substrate, and covering the first seedling raising paper on the sowed substrate.
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