CN114503906A - Straw substrate rice seedling raising method - Google Patents

Straw substrate rice seedling raising method Download PDF

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Publication number
CN114503906A
CN114503906A CN202210243863.6A CN202210243863A CN114503906A CN 114503906 A CN114503906 A CN 114503906A CN 202210243863 A CN202210243863 A CN 202210243863A CN 114503906 A CN114503906 A CN 114503906A
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straw
water
rice
seedling
watering
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周纯有
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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
    • A01G31/00—Soilless cultivation, e.g. hydroponics
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01C—PLANTING; SOWING; FERTILISING
    • A01C21/00—Methods of fertilising, sowing or planting
    • A01C21/005—Following a specific plan, e.g. pattern
    • 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
    • A01G24/00—Growth substrates; Culture media; Apparatus or methods therefor
    • A01G24/20—Growth substrates; Culture media; Apparatus or methods therefor based on or containing natural organic material
    • A01G24/22—Growth substrates; Culture media; Apparatus or methods therefor based on or containing natural organic material containing plant material
    • C—CHEMISTRY; METALLURGY
    • C05—FERTILISERS; MANUFACTURE THEREOF
    • C05B—PHOSPHATIC FERTILISERS
    • C05B7/00—Fertilisers based essentially on alkali or ammonium orthophosphates
    • C—CHEMISTRY; METALLURGY
    • C05—FERTILISERS; MANUFACTURE THEREOF
    • C05G—MIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENT SUBCLASSES OF CLASS C05; MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVING A SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES, SOIL-CONDITIONERS, WETTING AGENTS; FERTILISERS CHARACTERISED BY THEIR FORM
    • C05G3/00—Mixtures of one or more fertilisers with additives not having a specially fertilising activity
    • C—CHEMISTRY; METALLURGY
    • C05—FERTILISERS; MANUFACTURE THEREOF
    • C05G—MIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENT SUBCLASSES OF CLASS C05; MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVING A SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES, SOIL-CONDITIONERS, WETTING AGENTS; FERTILISERS CHARACTERISED BY THEIR FORM
    • C05G3/00—Mixtures of one or more fertilisers with additives not having a specially fertilising activity
    • C05G3/80—Soil conditioners
    • 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
    • A01G22/00—Cultivation of specific crops or plants not otherwise provided for
    • A01G22/20—Cereals
    • A01G22/22—Rice
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00—Technologies for solid waste management
    • Y02W30/40—Bio-organic fraction processing; Production of fertilisers from the organic fraction of waste or refuse

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  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Soil Sciences (AREA)
  • Environmental Sciences (AREA)
  • Pest Control & Pesticides (AREA)
  • Cultivation Receptacles Or Flower-Pots, Or Pots For Seedlings (AREA)

Abstract

The invention belongs to the technical field of rice planting, and particularly relates to a method for raising rice seedlings by straw matrix water, which comprises the following steps of 1, leveling a seedbed; 2. spreading plastic cloth; 3. placing a plate; 4. scattering a straw matrix, crushing raw straws into straw powder, spraying disinfection powder into the straw powder, and spraying ferment and fulvic acid into the straw powder to obtain the straw matrix; 5. watering; 6. sowing, covering straw substrate; 7. watering; 8. coating a film; 9. supplementing water; 10. lifting the film; 11. and (3) managing in a seedling stage, namely applying 25 g of special fertilizer for the rice seedlings in a seedling tray when the height of the seedlings is 4-5 cm, wherein the special fertilizer for the rice seedlings is prepared from ammonium sulfate, ammonium phosphate, potassium sulfate, sulfur, calcium, zinc sulfate, manganese sulfate, rooting powder, paclobutrazol, humic acid, bacillus subtilis and trichoderma harzianum. Straw is made into straw matrix, and the straw matrix is used for replacing rice seedling soil, so that the problem that a part of rice seedling soil is still needed in a seedling raising method for rice seedling cultivation in water is solved, and the soilless replacement of the rice seedling soil is thoroughly realized.

Description

Straw substrate rice seedling raising method
The technical field is as follows:
the invention belongs to the technical field of rice planting, and particularly relates to a method for raising rice seedlings by straw matrix water.
Background art:
one 2243970, the rice in the field needs to use about 3 cubic meters of rice seedling soil, and the rice seedling soil must be high-quality black soil. Taking Heilongjiang as an example, the planting area of rice in Heilongjiang is 6000-7000 ten thousand mu, about 1300 thousand cubic meters of black soil is needed in spring every year, but no specific seedling soil taking field exists at any village. And about 5 hundred million mu of rice planting area exists in China, and the rice seedling soil is required to be about 1 billion cubic meters every year, so that the problem of soil taking of the rice seedling soil is not easy to solve.
Taking the rice seedling soil has been an important research direction for rice seedling culture, for example, the rice seedling soil is taken by using yellow sandy soil, perlite added soil and other soil, but the rice seedling soil is not successfully taken.
Although the seedling raising method for rice seedlings by the inventor (application number CN 202010707853.4) solves the problem of soil borrowing of a part of rice seedling soil, the special fertilizer for rice seedlings by the method is prepared by uniformly mixing straw humus, biogas residues, chlormequat chloride and soil, and a part of rice seedling soil and biogas residues still need to be used in the special fertilizer.
The invention content is as follows:
in order to solve the problems, the invention provides a method for growing rice seedlings by straw matrix water, which is characterized in that straws are made into the straw matrix, and the straw matrix is used for replacing rice seedling soil, thereby solving the problem that part of rice seedling soil is still needed in the method for growing rice seedlings by water, and thoroughly realizing the soilless replacement of the rice seedling soil.
The technical scheme adopted by the invention is as follows: a method for growing rice seedlings by straw matrix comprises the following steps:
step one, leveling seedbed
Leveling the seedbed, watering and compacting, and building the periphery of the seedbed into a pool shape by using bricks or soil ridges;
step two, spreading plastic cloth
After the seedbed reaches the horizontal flatness, plastic cloth (the thickness is 0.08-0.1 mm) is laid on the seedbed to form a water pool;
step three, placing the plate
The disposable seedling tray or the hard disk (21 holes) is neatly placed on the plastic cloth;
step four, scattering straw substrate
Straw substrate with the thickness of 1.0-1.2 cm is scattered in each seedling tray;
the preparation method of the straw substrate comprises two methods;
the method comprises the following steps: crushing raw straws into straw powder by a crusher, spraying disinfection powder into the straw powder, and spraying enzyme and fulvic acid into the straw powder to prepare a straw matrix;
the second method comprises the following steps: drying the decomposed straw by a dryer to prepare a straw substrate; crushing and kneading straws to prepare straw powder with the maximum particle size not more than 0.5 cm, adding water and a leavening agent into the straw powder for decomposition, sterilizing the decomposed and dried straw matrix, adjusting acid, and adding rooting powder;
step five, watering
Uniformly watering by using a water pipe provided with a spray head, watering the seedling tray twice, and watering for the second time after watering for the first time at intervals;
step six, sowing and covering straw substrate
Sowing by using a sowing machine, and then scattering straw matrix with the thickness of 0.5-0.7 cm;
seventhly, watering
Watering the seedling tray, and if seed leakage occurs in the watering process, covering the straw substrate again;
step eight, laminating
Firstly, covering a layer of non-woven fabric on a seedling tray, and then covering the non-woven fabric with plastic cloth or a plastic film;
step nine, water replenishing
After 5-6 days of sowing, the mulching film is lifted for checking, and if the seedling tray is lack of water, water needs to be supplemented to the seedling tray;
step ten, lifting the membrane
When the rice seedlings grow to 1.5-2.5 cm and the seedling tray is empty of water, the covering film is lifted;
eleven steps of seedling stage management
(1) When the rice seedlings grow to have two leaves and one core and the height of the seedlings is 4-5 cm, applying 23-27 g of special fertilizer for the rice seedlings in each seedling tray, and then washing the residual special fertilizer on the leaf surfaces with water; spraying the growth agent on the rice seedlings the next day, wherein the using amount of the growth agent in each plate is 1 g, and 1 g of the growth agent is mixed with 30 g of clear water; during the period, watering is continuously carried out, and the seedling tray is kept moist;
the special fertilizer for rice seedling cultivation is prepared from 55.85% of ammonium sulfate, 10% of ammonium phosphate, 16.5% of potassium sulfate, 13% of sulfur and calcium, 1% of zinc sulfate hydrate, 0.7% of manganese sulfate, 0.5% of rooting powder, 0.2% of paclobutrazol, 1% of humic acid, 0.6% of bacillus subtilis and 0.65% of trichoderma harzianum;
(2) when the rice seedlings grow to be more than two leaves and one core and the height of the seedlings is higher than 5 cm, water is poured, a water outlet of the plastic cloth of the seedbed is plugged, then water is added, the water adding depth exceeds 1-2 cm of the straw substrate, the water level is always kept, and the water is discharged until the day before the seedlings are loaded.
Furthermore, the thickness of the straw substrate in each seedling tray in the fourth step is 1.1 cm.
Furthermore, in the sixth step, the thickness of the straw substrate covered in each seedling tray is 0.6 cm.
Further, in the eleventh step, 25 g of special fertilizer for rice seedling cultivation is applied to each seedling tray.
Furthermore, in the eleventh step, the water adding depth exceeds 1.5 cm of the straw substrate during irrigation, and the water level is always kept.
The invention has the beneficial effects that: the method for cultivating rice seedlings by using straw matrix is provided, the soilless seedling cultivation of rice is thoroughly realized, the straw matrix prepared by using straw replaces rice seedling soil, the problem of replacing the rice seedling soil is solved, the seedling cultivation quality of rice seedlings is improved, the high and stable yield of rice is guaranteed, huge economic and social benefits are generated, and the straw matrix can be widely applied to cultivation of various vegetable seedlings. Its main advantage is as follows:
(1) the seedling raising is carried out by using the straw substrate, so that the soil taking problem of rice seedling soil is thoroughly solved; secondly, a large amount of straws can be consumed, the problem of straw combustion of farmers is solved, and the method is economical and environment-friendly; thirdly, the organic matter content of the soil of the rice field is increased after the straws are returned to the field, the problem of soil hardening of the rice field is solved, the soil structure is improved, and the soil fertility is improved; fourthly, the cost of rice seedling is reduced, the straw substrate is popularized only in Heilongjiang for seedling culture, and the seedling culture cost can be saved by about 30 million Yuan each year.
(2) The seedling emergence is uniform, the straw matrix rice seedlings cultured by the water are paved on a leveled seedling bed by using 0.08-0.1 mm of plastic cloth, then a seedling tray with 21 holes is placed on the plastic cloth, the straw matrix is uniformly scattered in the seedling tray by the soil scattering device, and the spray heads are used for uniformly spraying water, so that redundant water can be discharged, and the straw matrix is guaranteed to be wet and not to be watered. Compared with watering by directly using a water pipe, the sprinkler head is more uniform in watering, uneven drought and waterlogging can not be generated, and the seedlings can emerge more orderly.
(3) The root system is coiled well, on one hand, the organic content of the straw substrate is higher, so that rice seedlings are developed in rooting and strong in seedling; on the other hand, the special fertilizer for rice seedlings in the method plays a role in promoting the growth of the root system, and the seedlings are strong only if the root system grows well. The straw substrate rice seedling raising by water can prolong the natural life of the fibrous roots of the rice seedling by 10-15 days, and ensure the development of the root system and the thick and long root system. The stout fibrous roots and the main roots are coiled together, thus improving the survival rate of rice seedlings.
(4) The method reduces the planting cost of the rice, improves the economic benefit of rice farmers, does not need rice seedling soil, reduces the working procedures of digging, loading soil, unloading soil, transporting soil, screening soil and the like, and reduces the cost of labor, transportation and the like. The straw substrate can be obtained through batch production, the cost of seedling culture of each ton of straw substrate is far lower than that of rice seedling soil at least by 2000 trays, the use of the straw substrate is labor-saving, time-saving and worry-saving, a large amount of time can be saved, and precious time is won for seedling culture in spring. And the problem of soil taking before seedling culture is not worried, so that the method is very worry-saving.
(5) The straw is returned to the field, the ecological environment is protected, the problem of burning most straws is solved, soil taking is not needed, and ecological resources and environment are protected. The straw substrate is rich in organic matters, so that the content of the organic matters in the soil of the rice field is increased.
(6) The damping-off of the rice can be eliminated, and the damping-off is the most difficult problem to solve in dry-raised rice planting. The disease is caused by the damping-off, namely, the roots grow out firstly, and die after about 20 days of seedling age, the main roots do not grow yet, the rice seedlings are lack of nutrition, the damping-off can be caused as long as 1-2 days of old and new roots are not well alternated, and the rice seedlings die after 2-3 days of disease. The life of the first grown water roots of the rice seedlings can reach more than 40 days, and the seedlings can be transplanted after being aged for 30 days, so that the process of alternation of new and old root systems does not occur on the seedling roots. Therefore, the seedling of the rice cultivated in water can not stand off, and the survival rate of the rice seedling is ensured.
The specific implementation mode is as follows:
example one
A method for growing rice seedlings by straw matrix comprises the following steps:
step one, leveling seedbed
Because the rice seedlings are bred in the water, the seedbed must be leveled, the seedbed is watered and compacted after reaching the horizontal flatness, the seedbed is prevented from being stepped out of a pit during tray placement, the four sides of the seedbed are built into a pool shape by bricks or soil ridges, and the height of the built ridge is about 6 inches;
step two, spreading plastic cloth
After the seedbed reaches the horizontal flatness, plastic cloth (the thickness is 0.08-0.1 mm) is laid on the seedbed to form a water pool, the plastic cloth is mainly used for storing water and irrigating water after the rice seedlings grow to 4-5 cm; at the initial stage of rice seedling raising, plastic cloth is arranged below the plastic cloth, even a low-lying area of a land parcel can not enter a seedling tray, the seedling tray is guaranteed to be moist and free of water, if the watering amount is too large, redundant water can be discharged out of the seedling tray through the 21 holes, and finally is discharged through a water outlet reserved on one side of the plastic cloth. Therefore, the straw substrate in the seedling tray is ensured to be moist and not to store water, and the rice seedlings are ensured to be discharged at one time;
step three, placing the plate
Disposable seedling trays or hard disks (21 holes) are neatly placed on the plastic cloth, and the main effect of the 21 rows of the seedling trays is that if the watering amount is too much at the initial seedling stage, redundant water can be discharged through the holes, so that the phenomenon of water remaining on the straw substrate of the seedling trays can not occur, and the uniform rice seedlings can be ensured at the initial seedling stage;
step four, scattering straw substrate
Uniformly scattering straw substrates with the thickness of 1.0-1.2 cm into each seedling tray by using a duster;
the preparation method of the straw substrate comprises two methods;
the method comprises the following steps: crushing raw straws into straw powder by a crusher, spraying disinfection powder into the straw powder, and spraying enzyme and fulvic acid into the straw powder to prepare a straw matrix; because the straws contain a small amount of drug residues, worm egg residues and bacteria, the straws can be harmful to rice seedlings if not sterilized;
the second method comprises the following steps: drying the decomposed straw by a dryer to prepare a straw substrate; crushing and kneading straws to prepare straw powder with the maximum particle size not more than 0.5 cm, adding water and a leavening agent into the straw powder for decomposition, sterilizing the decomposed and dried straw matrix, adjusting acid, and adding rooting powder; or two sets of equipment can be used for crushing the straws, one set of equipment can be used for crushing and kneading the straws simultaneously, and the other set of equipment can be used for crushing the straw powder into straw powder not more than 0.5 cm;
the growth vigor of rice seedlings cultured by the decomposed straw matrix or the undecomposed straw matrix is superior to that of rice seedling soil seedling culture, and the straw matrix is high in organic matter content and rich in nitrogen, phosphorus and potassium. And the soil matrix is more drought-resistant than the rice seedling, at the initial stage of rice seedling culture, the current rice growers use dry planting, the rice seedling emergence time is increased, the temperature is high for about 8 days, the temperature is low for 12-15 days, the rice seedling soil matrix is used for watering for many times, and the seedling emergence time is prolonged when the water amount is large. The straw substrate is used for raising seedlings, the water content is high, and the soil-out time cannot be prolonged due to water shortage.
Step five, watering
Uniformly watering by using a water pipe provided with a spray head twice, uniformly watering twice in the seedling tray, thoroughly watering with water, and watering for a second time at an interval of one end time after watering for the first time because the straw matrix is dry matter, taking the watering after the flower emergence on the straw matrix as the standard, and if the water is watered too much, penetrating the excessive water to the plastic cloth through the seedling tray holes and then discharging the plastic cloth out of the seedling bed;
step six, sowing and covering straw substrate
Sowing by using a sowing machine, determining the sowing amount according to the requirements of rice varieties, uniformly sowing seeds on a seedling tray, and then uniformly scattering straw matrixes with the thickness of 0.5-0.7 cm on the seeds;
seventhly, watering
The straw substrate is dry matter, so that the moisture of the straw substrate at the bottom of the seedling tray can not return to the straw substrate covered on the seedling tray, and therefore watering is needed again;
step eight, laminating
Because many places are planted in a dry manner, the seedlings are pulled for 8-12 days at low temperature, the film covering can not only preserve heat and heat, but also prevent water from evaporating, and water drops can not appear on the greenhouse; when in film covering, a layer of non-woven fabric is covered on the seedling tray to play the roles of heat preservation and no seedling burning after the seedlings come out, and then a second layer of plastic cloth or plastic film is covered on the non-woven fabric to prevent water evaporation and play the role of heating;
step nine, replenishing water
After 5-6 days of sowing, the mulching film is lifted for checking, if the seedling tray is lack of water, the seedling tray needs to be supplemented with water, the water supplement amount is based on the moisture penetration and the water does not go out, and then the film is covered until the seedling emerges;
step ten, lifting the membrane
When the rice seedlings grow to 1.5-2.5 cm and the seedling tray is empty of water, the covering film is lifted;
eleven steps of seedling stage management
(1) When the rice seedlings grow to have two leaves and one core and the height of the seedlings is 4-5 cm, applying 23-27 g of special fertilizer for the rice seedlings in each seedling tray, and then washing the residual special fertilizer on the leaf surfaces with water; spraying the growth agent on the rice seedlings the next day, wherein the using amount of the growth agent in each plate is 1 g, and 1 g of the growth agent is mixed with 30 g of clear water; during the period, watering is continuously carried out, the watering amount can keep the seedling tray moist, if the watering amount is large, redundant water can permeate the plastic cloth through the holes of the seedling tray or the gaps between the tray and the tray, and then the water is discharged out of the seedling bed;
the special fertilizer for rice seedling cultivation is prepared from 55.85% of ammonium sulfate, 10% of ammonium phosphate, 16.5% of potassium sulfate, 13% of sulfur and calcium, 1% of zinc sulfate hydrate, 0.7% of manganese sulfate, 0.5% of rooting powder, 0.2% of paclobutrazol, 1% of humic acid, 0.6% of bacillus subtilis and 0.65% of trichoderma harzianum;
the special fertilizer for the rice seedlings cultivated in water ensures the content of three elements for plant growth, so that the rice seedlings do not lack nutrients in the growth period, and in addition, the rooting, acid regulating, growth promoting and virus killing elements improve the disease resistance of the rice seedlings during growth, so that the rice seedlings have developed root systems and strong seedlings; the growth promoter has the effects of promoting the growth of roots, strengthening seedlings and assisting the growth of rice seedlings.
(2) When the rice seedlings grow to more than two leaves and one core and the height of the seedlings is higher than 5 cm, water is poured, a water discharge port of the plastic cloth of the seedbed is plugged, then water is added, the water adding depth exceeds 1-2 cm of the straw substrate, the water level is always kept until the seedling is carried, and water is discharged one day before the seedling is carried, so that the weight of the seedling tray is reduced, and the seedlings are convenient to transport.
Example two
On the basis of the technical scheme of the embodiment, the thickness of the straw substrate in each seedling tray in the fourth step is 1.1 cm.
EXAMPLE III
On the basis of the technical scheme of the embodiment, the thickness of the straw substrate covered in each seedling tray in the step six is 0.6 cm.
Example four
On the basis of the technical scheme of the embodiment, in the eleventh step, 25 g of special fertilizer for rice seedling cultivation is applied to each seedling tray.
EXAMPLE five
On the basis of the technical scheme of the embodiment, in the eleventh step, the water is added to the straw substrate to a depth of 1.5 cm higher than the straw substrate during irrigation, and the water level is always kept.

Claims (5)

1. A method for raising rice seedlings by straw matrix water is characterized by comprising the following steps: the straw substrate seedling raising method comprises the following steps:
step one, leveling seedbed
Leveling the seedbed, watering and compacting, and building the periphery of the seedbed into a pool shape by using bricks or soil ridges;
step two, spreading plastic cloth
After the seedbed reaches the horizontal flatness, the plastic cloth is laid on the seedbed to form a water pool;
step three, placing the plate
The disposable seedling tray or the hard disk is placed on the plastic cloth in order;
step four, scattering straw substrate
Spreading straw substrate with the thickness of 1.0-1.2 cm in each seedling tray;
the preparation method of the straw substrate comprises two methods;
the method comprises the following steps: crushing raw straws into straw powder by a crusher, spraying disinfection powder into the straw powder, and spraying enzyme and fulvic acid into the straw powder to prepare a straw matrix;
the second method comprises the following steps: drying the decomposed straw by a dryer to prepare a straw substrate; crushing and kneading straws to prepare straw powder with the maximum particle size not more than 0.5 cm, adding water and a leavening agent into the straw powder for decomposition, sterilizing the decomposed and dried straw matrix, adjusting acid, and adding rooting powder;
step five, watering
Uniformly watering by using a water pipe provided with a spray head, watering the seedling tray twice, and watering for the second time after watering for the first time at intervals;
step six, sowing and covering straw substrate
Sowing by using a sowing machine, and then scattering straw matrix with the thickness of 0.5-0.7 cm;
seventhly, watering
Watering the seedling tray, and if seed leakage occurs in the watering process, covering the straw substrate again;
step eight, laminating
Firstly, covering a layer of non-woven fabric on a seedling tray, and then covering the non-woven fabric with plastic cloth or a plastic film;
step nine, water replenishing
After 5-6 days of sowing, the mulching film is lifted for checking, and if the seedling tray is lack of water, water needs to be supplemented to the seedling tray;
step ten, lifting the membrane
When the rice seedlings grow to 1.5-2.5 cm and the seedling tray is empty of water, the covering film is lifted;
eleven steps of seedling stage management
(1) When the rice seedlings grow to have two leaves and one core and the height of the seedlings is 4-5 cm, applying 23-27 g of special fertilizer for the rice seedlings in each seedling tray, and then washing the residual special fertilizer on the leaf surfaces with water; spraying the growth agent on the rice seedlings the next day, wherein the using amount of the growth agent in each plate is 1 g, and 1 g of the growth agent is mixed with 30 g of clear water; during the period, watering is continuously carried out, and the seedling tray is kept moist;
the special fertilizer for rice seedling cultivation is prepared from 55.85% of ammonium sulfate, 10% of ammonium phosphate, 16.5% of potassium sulfate, 13% of sulfur and calcium, 1% of zinc sulfate hydrate, 0.7% of manganese sulfate, 0.5% of rooting powder, 0.2% of paclobutrazol, 1% of humic acid, 0.6% of bacillus subtilis and 0.65% of trichoderma harzianum;
(2) when the rice seedlings grow to be more than two leaves and one core and the height of the seedlings is higher than 5 cm, water is poured, a water outlet of the plastic cloth of the seedbed is plugged, then water is added, the water adding depth exceeds 1-2 cm of the straw substrate, the water level is always kept, and the water is discharged until the day before the seedlings are loaded.
2. The straw substrate rice seedling raising method according to claim 1, characterized in that: in the fourth step, the thickness of the straw substrate in each seedling tray is 1.1 cm.
3. The straw substrate rice seedling raising method according to claim 1, characterized in that: in the sixth step, the thickness of the straw substrate covered in each seedling tray is 0.6 cm.
4. The straw substrate rice seedling raising method according to claim 1, characterized in that: in the eleventh step, 25 g of special fertilizer for rice seedling cultivation is applied to each seedling tray.
5. The straw substrate rice seedling raising method according to claim 1, characterized in that: in the eleventh step, the water adding depth exceeds 1.5 cm of the straw substrate during irrigation, and the water level is always kept.
CN202210243863.6A 2022-03-14 2022-03-14 Straw substrate rice seedling raising method Pending CN114503906A (en)

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