CN109169083B - Method for cultivating dry seedlings by rice mulching machine transplanting discs - Google Patents
Method for cultivating dry seedlings by rice mulching machine transplanting discs Download PDFInfo
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- CN109169083B CN109169083B CN201811338106.7A CN201811338106A CN109169083B CN 109169083 B CN109169083 B CN 109169083B CN 201811338106 A CN201811338106 A CN 201811338106A CN 109169083 B CN109169083 B CN 109169083B
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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
- A01G22/00—Cultivation of specific crops or plants not otherwise provided for
- A01G22/20—Cereals
- A01G22/22—Rice
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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
- A01G13/00—Protecting plants
- A01G13/02—Protective coverings for plants; Coverings for the ground; Devices for laying-out or removing coverings
- A01G13/0256—Ground coverings
- A01G13/0268—Mats or sheets, e.g. nets or fabrics
- A01G13/0275—Films
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- 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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
- Y02A40/10—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in agriculture
- Y02A40/28—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in agriculture specially adapted for farming
Abstract
The invention provides a method for cultivating dry seedlings by rice mulching machine transplanting discs, belonging to the technical field of agriculture. The method provided by the invention comprises the steps of seedbed construction, seedbed moisture construction, tray sowing, tray watering, tray arrangement, film covering, soil compacting and seedling bed management. The invention utilizes the fact that the rice is formed by coleoptiles and incomplete leaves, the thick and stiff cone-shaped bud tips have strong penetrating power to penetrate through the mulching film for seedling culture, soil is used for proper pressure film pressing in the seedling culture process, the mulching film is not tightly combined with soil, certain pressure or tension can be formed on the mulching film, the rice bud tips can penetrate through the film to be discharged, meanwhile, the film penetrating growth and water loss of weeds can be prevented, and therefore, the effects of high soil moisture conservation, weeding, complete seedling, seedling strengthening, water saving, labor saving, cost saving, seedling strengthening and yield increase are achieved.
Description
Technical Field
The invention belongs to the technical field of agriculture, mainly relates to a rice seedling raising method, and particularly relates to a method for raising dry seedlings by rice mulching film covering machine transplanting discs.
Background
Rice is one of the main grain crops in China, and plays a significant role in national grain safety and social and economic development. Since the 21 st century, with the climate change and the increasing of water consumption in industry and city, the contradiction between the limited water resource and the agricultural water is increasingly tense, and the drought resistance, water saving, simple cultivation has become the development trend of modern agriculture. Meanwhile, with the accelerated land circulation, the mechanized and large-scale rice production degree is higher and higher, and particularly, the disc-cultivating machine transplanting technology becomes the leading technology for the development of the modern rice industry. The rice disc-cultivation machine-transplanting is a key measure for reducing the cost, improving the yield per unit and increasing the benefit, and the key is whether the yield per unit of machine-transplanting cultivation can be improved or not and the cultivation of strong seedlings. However, in the double cropping area of Huang-Huai rice and wheat in North China, the rice seedling raising period is just the drought and dry season, the field evaporation capacity is large, the water loss is fast, the tray seedling raising is easy to be subjected to drought, if a large amount of water is frequently added, water resources are wasted, the labor cost is increased, the seedlings grow excessively, and high-quality strong seedlings are difficult to cultivate. Poor seedling quality becomes a key limiting factor for improving the yield per unit of mechanical transplanting and cultivating of rice in Huang-Huai areas in North China. Therefore, the research and innovation of a new method for raising dry seedlings by rice discs breaks through the key technical bottleneck of limiting the rice mechanical transplanting cultivation, and has very important significance for realizing water conservation, cost saving, yield increase and efficiency improvement, accelerating the development of the rice industry and optimizing the industrial structure.
At present, the main modes of rice seedling raising by a rice transplanting machine are as follows: variety selection → seedling bed selection and cultivation → seedling bed preparation → watering and bed soil disinfection → seed preparation → sowing → soil sealing and weeding → seedling bed management. The rice seedling bed management mode mainly comprises drought management, humidity management and water management.
The existing tray seedling raising mode has defects and shortcomings. The rice seedling raising period in the double cropping zone of Huang-Huai rice and wheat in North China is just in high-temperature, drought and dry seasons, and the problems of large field evaporation capacity and fast water loss exist. The tray seedling raising adopts drought management, small water service watering is needed, multiple watering is needed, and due to the limitation of water sources, the proper control of the moisture of a seedling bed is very difficult, the seedling bed is easy to be withered due to drought or overgrown due to excessive moisture, machine-transplanted strong seedlings are difficult to grow, and the cost is greatly increased; in addition, wet seedling raising or water seedling raising is adopted, the growth of seedlings is difficult to control, excessive growth and weak seedlings are easy to cause, the green turning and tillering after seedling transplanting are slow, and the yield is low.
Disclosure of Invention
In view of the above, the invention aims to provide a method for cultivating dry seedlings by a rice mulching film machine transplanting disc, which achieves the purposes of soil moisture conservation, weeding, water saving, cost saving, seedling strengthening and high yield.
In order to achieve the above object, the present invention provides the following technical solutions:
the invention provides a method for cultivating dry seedlings by rice mulching film machine transplanting discs, which comprises the following steps:
(1) making seedling beds on a ploughed, rotary-tilled and leveled field, digging irrigation and drainage ditches with the width of 20-30 cm and the depth of 18-25 cm between the seedling beds, drilling cross holes on the side walls between the seedling beds and the irrigation and drainage ditches, and digging enclosing ditches with the width of 40-50 cm and the depth of 30-40 cm at the periphery of the seedling beds to obtain a seedling bed;
(2) mixing and decomposing screened field fine soil, human, livestock and poultry manure and special rice fertilizer, screening and refining decomposed fertilizer soil, collecting undersize fine soil, mixing with a seedling strengthening agent, and sterilizing to obtain nutrient soil;
(3) filling the nutrient soil into each hole of the seedling tray, wherein the height of the nutrient soil is 0.3-0.5 cm lower than the edge of the seedling tray, so as to obtain the seedling tray filled with the nutrient soil;
(4) sowing the rice seeds exposed to the white into the holes of the seedling trays filled with the nutrient soil, flatly paving the seedling trays on a seedling bed after sowing, and overlapping the seedling trays and the flashes of the seedling trays;
(5) spraying water to the seedling tray which is tiled on the seedling bed in the step (4), and finishing spraying water when the relative water content of the nutrient soil in the seedling tray reaches 70-80%;
(6) covering a mulching film on the seedling tray sprayed with water in the step (5), wherein the thickness of the mulching film is 0.005-0.011 mm, and a bare land gap with the width of 5-10 cm is reserved between every two seedling beds when the mulching film is covered;
(7) covering the mulching film with the fine field soil sieved in the step (2), covering soil with the thickness of 0.5-0.6 cm, compacting the edge of the mulching film with soil, infiltrating irrigation along the irrigation and drainage ditch, wherein the water surface of the infiltrated irrigation does not overflow a seedling tray, and the fine soil covered on the seedling tray is kept not to be infiltrated, so that the seedling bed is infiltrated thoroughly;
(8) spraying urea topdressing during the seedling cultivation period in the three-leaf period of the seedlings, and performing pest control during the whole seedling cultivation period;
there is no time sequence restriction between the step (1) and the step (2).
Preferably, the distance between the cross holes in the step (1) is 1-1.5 m, and the diameter of the cross holes is 3-5 cm.
Preferably, in the step (1), the double rows of seedling trays are arranged, the width of the seedling bed is 130cm, and the width for laying the seedling trays is 120 cm; the single-row seedling placing disc has the seedling bed width of 70cm and the seedling laying width of 60 cm.
Preferably, the mass ratio of the field fine soil, the human, livestock and poultry manure and the special rice fertilizer sieved in the step (2) is 100: 20: 0.4;
the mass ratio of the undersize fine soil to the seedling strengthening agent is 100: 0.5.
preferably, the liquid medicine for disinfection in the step (2) is a fenaminosulf solution; the dixolone solution is prepared by mixing dixolone with the mass concentration of 65% and water according to the volume ratio of 1: 1000 to obtain.
Preferably, the seedling tray in the step (4) comprises a bowl tray or a blanket tray;
when the seedling disc is a bowl disc, the seeding quantity of the bowl disc is 3-5 grains/hole, the specification of the bowl disc is 448 holes/disc, and the tiling density of the bowl disc is 35-40 discs/mu;
when the seedling tray is a blanket tray, the seeding amount of the blanket tray is 90-110 g/tray, and the density of the blanket tray is 30-35 trays/mu.
Preferably, the method for treating the rice seeds exposed to white in the step (4) comprises the following steps:
A. drying the rice seeds in the sun for 2d to 3 d;
B. and (3) soaking the aired rice seeds in a fungus cleaning seed soaking agent for 72h, stirring and turning for 1-2 times every day, cleaning with clear water, and stacking for 10-14 h at the temperature of 20-27 ℃ to obtain the exposed rice seeds.
Preferably, the lubai rice seeds include japonica 16, japonica 20, san rice 14, or shannon 601.
Preferably, the application amount of the urea in the step (8) is 3-5 kg/667m2A seedling bed.
Preferably, the objects for disease control in step (8) include damping off and seedling blight; the target of insect pest control is Laodelphax striatellus and thrips oryzae;
the method for preventing and treating damping-off comprises the following steps: wettable powder spray of 50% Shunfu isoprothiolaneSpraying the rice seedling field with a spraying amount of 667 g-1000 g/667m2Spraying 30% hymexazol aqua in the seedling field of 800-1200 g/667m2Seedling beds;
the method for preventing and treating the plague comprises the following steps: spraying 2% valia-8 hundred million spores/gram Ceriporia flava suspending agent on a seedling bed, wherein the spraying amount is 100-120 mL/667m275-113 mL of rice seedling bed or 40% isoprothiolane missible oil and 40-50L of water are mixed and diluted, and the obtained diluent is sprayed to 667m2Seedling beds;
the method for preventing and controlling the Laodelphax striatellus or the rice thrips comprises the following steps: in the period from one leaf to one heart of the seedling, 18g to 20g of 25 percent pymetrozine wettable powder or 30mL to 40mL of 20 percent dinotefuran suspending agent and 40L to 50L of water are mixed and diluted to obtain a diluent which is sprayed with 667m of powder2A seedling bed.
The invention provides a method for raising rice seedlings by mulching a plastic film on a disc, which utilizes the biological rule of rice germination and seedling emergence, wherein the rice has strong penetrability of a thick and stiff cone-shaped bud tip consisting of a coleoptile and incomplete leaves (the incomplete leaves have no leaves and only sharp and stiff leaf sheaths), and even if the coleoptile exposed out of soil is broken, the incomplete leaves still have strong penetrability because only the leaf sheaths have no leaves. Therefore, the mulching film is properly pressed by soil, so that the mulching film is not tightly combined with soil, a certain pressure or tension can be formed on the mulching film, rice bud tips can penetrate through the mulching film to be discharged, and weeds can be prevented from penetrating through the mulching film to grow and water loss. According to the invention, the biological differences of bud growth change, morphological structure, penetrating power and the like when rice and weeds germinate and emerge are utilized, the rice is directly covered with a plastic film after being sowed, and then proper soil compaction is carried out on the plastic film, so that the sowing operation is completed. Thereby achieving the effects of high soil moisture conservation, weeding, complete and strong seedlings, water saving, labor saving, cost saving and yield increase, and overcoming the defects and the shortcomings of the prior rice seedling raising technology by a rice tray.
The seedling culture method provided by the invention can be used for culturing suitable dry-raised strong seedlings; the yield of each mu of field is increased by 50-80 kg/mu. And increasing the net income by 180-260 yuan/mu per mu. Compared with the conventional tray seedling raising, the invention saves water by 100-150 m3Per mu, reducing the irrigation times for 3-5 times, and saving the seedling raising cost by 50 yuan per mu; can cultivateIs suitable for dry raising strong seedlings.
Detailed Description
The invention provides a method for cultivating dry seedlings by rice mulching film machine transplanting discs, which comprises the following steps:
(1) making seedling beds on a ploughed, rotary-tilled and leveled field, digging irrigation and drainage ditches with the width of 20-30 cm and the depth of 18-25 cm between the seedling beds, drilling cross holes on the side walls between the seedling beds and the irrigation and drainage ditches, and digging enclosing ditches with the width of 40-50 cm and the depth of 30-40 cm at the periphery of the seedling beds to obtain a seedling bed;
(2) mixing and decomposing screened field fine soil, human, livestock and poultry manure and special rice fertilizer, screening and refining decomposed fertilizer soil, collecting undersize fine soil, mixing with a seedling strengthening agent, and sterilizing to obtain nutrient soil;
(3) filling the nutrient soil into each hole of the seedling tray, wherein the height of the nutrient soil is 0.3-0.5 cm lower than the edge of the seedling tray, so as to obtain the seedling tray filled with the nutrient soil;
(4) sowing the rice seeds exposed to the white into the holes of the seedling trays filled with the nutrient soil, flatly paving the seedling trays on a seedling bed after sowing, and overlapping the seedling trays and the flashes of the seedling trays;
(5) spraying water to the seedling tray which is tiled on the seedling bed in the step (4), and finishing spraying water when the relative water content of the nutrient soil in the seedling tray reaches 70-80%;
(6) covering a mulching film on the seedling tray sprayed with water in the step (5), wherein the thickness of the mulching film is 0.005-0.011 mm, and a bare land gap with the width of 5-10 cm is reserved between every two seedling beds when the mulching film is covered;
(7) covering the mulching film with the fine field soil sieved in the step (2), covering soil with the thickness of 0.5-0.6 cm, compacting the edge of the mulching film with soil, infiltrating irrigation along the irrigation and drainage ditch, wherein the water surface of the infiltrated irrigation does not overflow a seedling tray, and the fine soil covered on the seedling tray is kept not to be infiltrated, so that the seedling bed is infiltrated thoroughly;
(8) spraying urea topdressing during the seedling cultivation period in the three-leaf period of the seedlings, and performing pest control during the whole seedling cultivation period;
there is no time sequence restriction between the step (1) and the step (2).
According to the method, seedling beds are made on a ploughed, rotary-tilled and leveled field, irrigation and drainage ditches with the width of 20-30 cm and the depth of 18-25 cm are dug between the seedling beds, cross holes are drilled on the side walls between the seedling beds and the irrigation and drainage ditches, and enclosing ditches with the width of 40-50 cm and the depth of 30-40 cm are dug on the periphery of the seedling beds to obtain the seedling bed.
In the invention, the field is preferably flat in topography, good in drainage and irrigation, convenient to transport, clean and pollution-free. The plowing depth is preferably 18cm to 20cm, and more preferably 19 cm. The depth of the rotary tillage is preferably 12cm to 15cm, and more preferably 13 cm. The leveled field preferably includes a finished seedling board, which is level and consistent.
In the invention, when the seedling trays are arranged in double rows, the width of the seedling bed is preferably 130cm, wherein the width for laying the seedling trays is preferably 120 cm; when the seedling trays are arranged in a single row, the width of the seedling bed is preferably 70cm, and the width of the seedling trays laid is preferably 60 cm.
In the present invention, the width of the irrigation and drainage ditch is preferably 25 cm. The depth of the irrigation and drainage ditch is preferably 22 cm. The irrigation and drainage ditch and the surrounding ditch are convenient for irrigation and drainage. The distance between the cross holes is preferably 1-1.5 m, and the diameter of the cross holes is preferably 3-5 cm. The function of the cross holes is to facilitate the infiltration of the water.
In the invention, the seedling bed is preferably matched with large and medium-sized steel frame greenhouses or simple small greenhouses to form a greenhouse for seedling culture.
The invention mixes and thoroughly decomposes screened field fine soil, human, livestock and poultry manure and special rice fertilizer, screens and refines the thoroughly decomposed fertilizer soil, collects undersize fine soil, mixes the undersize fine soil with a seedling strengthening agent, and sterilizes to obtain the nutrient soil.
In the invention, the screened field fine soil is screened by a screen with the diameter of 6mm, and the soil grains with the diameter of 2 mm-4 mm reach more than 60 percent. The source of the field fine soil is vegetable garden soil, matured dry field soil, autumn ploughing, winter ploughing or spring harrowing rice field soil, soil taking (causing grass and pesticide damage) in barren grass land (particularly land parcels with weed rice seeds) or wheat field sprayed with herbicide in the season is strictly forbidden, and meanwhile, sand soil is not recommended to use because the sand soil is not favorable for packing and has the problem of poor water retention and fertilizer fixing performance. The preparation amount of fine soil in the field is every 667m290-120 kg of nutrient fine soil is prepared in a seedling bed,meanwhile, 30kg of fine soil is additionally sieved and used as film pressing soil (no fertilization and acid adjustment are carried out).
In the invention, the mass ratio of the screened field fine soil, the human, livestock and poultry manure and the special rice fertilizer is preferably 100: 20: 0.4; the decomposing method is that the moisture of the mixture of screened field fine soil, human, livestock and poultry manure and special fertilizer for rice is adjusted, the moisture content is required to reach the requirement of being kneaded into a ball by hand, the ball falls to the ground and is scattered, piling and sealing are carried out in a sunny day, a film is covered and sealed during piling and sealing, and the fertilizer soil is decomposed for more than 20 days, so that the fertilizer soil is fully decomposed. The non-decomposed farmyard manure, urea, ammonium bicarbonate and the like are prohibited to be directly mixed as base fertilizer to prevent the fertilizer from damaging the burnt seedlings. N in the special fertilizer for rice is as follows: p5O2：K2O is 16: 12: 14. the decomposed fertile soil is preferably crushed and sieved. The water content of the fertile soil is 10% -15% during crushing, and the diameter of the sieved screen is 6 mm. And (4) the screened fertile soil is qualified when the soil grains with the diameter of 2-4 mm reach more than 60%. The mass ratio of the undersize fine soil to the seedling strengthening agent is preferably 100: 0.5.
in the invention, the disinfectant liquid is preferably a fenaminosulf solution; the dixolone solution is prepared by mixing dixolone with the mass concentration of 65% and water according to the volume ratio of 1: 1000 to obtain. Sterilizing the nutrient soil, and preventing and treating damping off, cotton rot and the like.
After the nutrient soil is obtained, the nutrient soil is filled into each hole of the seedling tray, and the height of the nutrient soil is 0.3-0.5 cm lower than the edge of the seedling tray, so that the seedling tray filled with the nutrient soil is obtained.
In the invention, the type of the seedling tray is matched with a seedling planting machine for use. The seedling trays matched with different machines are different, in the embodiment of the invention, the length multiplied by the width of the seedling tray is 58cm multiplied by 27.5-28 cm, and the depth of the seedling tray is preferably 2-2.5 cm. The filling height of the nutrient soil is preferably 1.8-2.0 cm. The nutrient soil is prevented from being pressed when being loaded into the seedling tray, so that the nutrient soil is loosely loaded into the holes.
After the seedling tray filled with the nutrient soil is obtained, the rice seeds exposed to the white are sown into the holes of the seedling tray filled with the nutrient soil, the sown seedling tray is flatly laid on a seedling bed, and the seedling tray and the fly edges of the seedling tray are overlapped and placed.
In the present invention, the method for treating the rice seeds exposed to white preferably comprises the steps of:
A. drying the rice seeds in the sun for 2d to 3 d;
B. and (3) soaking the aired rice seeds in a fungus cleaning seed soaking agent for 72h, stirring and turning for 1-2 times every day, cleaning with clear water, and stacking for 10-14 h at the temperature of 20-27 ℃ to obtain the exposed rice seeds.
In the invention, the rice seeds are preferably high-yield, high-quality, strong tillering force, large panicle and large grain, and better disease resistance, lodging resistance and stress resistance. The rice seeds preferably include Oryza sativa 16, Oryza sativa 20, Oryza sativa 14, or Shannon 601, etc. The time for raising the seedlings is 30-32 d ahead of the time for transplanting the seedlings, for example, the seedlings are raised 5 months before and 20-25 days before and after the Shandong near-Yi area, and the seedlings are transplanted 6 months after and 20-25 days, so that the seedlings in Ningketian fields and the like are realized, and the seedlings in non-fertile fields and the like are not realized.
In the invention, the actinomycetes cleaning and soaking agent is obtained by mixing 12% of actinomycetes cleaning and soaking agent and 6-8 kg of water in 12-15 g per time. The mass ratio of the rice seeds to the actinomycete cleaning and seed soaking agent is 5: 6.12 to 8.15. The rice seeds are soaked in the linezolid cleaning and seed soaking agent to prevent rice bakanae disease, aphelenchoides besseyi and other seed-borne diseases.
In the present invention, the seeding is preferably precision seeding using a seeding machine. The specific conditions of the seeding are determined according to the variety of the seedling tray. The seedling disc preferably comprises a bowl disc or a blanket disc; when the seedling tray is a bowl tray, the seeding rate of the bowl tray is preferably 3-5 seeds/hole, the specification of the bowl tray is preferably 448 holes/tray, and the tiling density of the bowl tray is preferably 35-40 trays/mu, and more preferably 38 trays/mu. When the seedling tray is a blanket tray, the seeding rate of the blanket tray is preferably 90-110 g/tray, and more preferably 100 g/tray; the density of the blanket disc is preferably 30-35 discs/mu, and more preferably 33 discs/mu. The seeding quantity of each disk is properly adjusted according to different types of varieties during seeding.
After sowing, the sowed seedling tray is flatly laid on the seedling bed in order, the seedling tray and the fly edges of the seedling tray are overlapped and arranged, and the tray bottom is tightly attached to the bed surface.
Spraying water to the seedling tray after the seedling tray is spread on the seedling bed, and stopping spraying water when the relative water content of the nutrient soil in the seedling tray reaches 70-80%. The purpose of the water spray is to prevent subsequent infiltration of irrigation. After the water is sprayed, the nutrient soil layer in the hole is sunk and compacted, and the thickness of the soil layer is 1.7-1.8 cm. The purpose of soil layer compaction is that the filled soil is loose dry soil and can be compacted after water spraying, and the thickness of the compacted soil layer is required to be 1.7-1.8 cm.
After the water is sprayed to the seedling tray, the seedling tray is covered with a mulching film, the thickness of the mulching film is 0.005-0.011 mm, and a bare soil gap with the width of 5-10 cm is reserved between every two seedling beds when the mulching film is covered.
In the invention, the thickness of the mulching film is 0.008 mm. The mulching film is preferably a degradable film of 30d, so that the growth of coarse and stiff conical bud tips penetrating through the mulching film is facilitated, and the complicated working procedure of removing the mulching film is omitted during subsequent seedling raising.
In the invention, when the mulching film is covered, the edges of the two films at the bottom of the ditch are not aligned or overlapped tightly, and a certain bare ground gap is reserved, so that rainfall or irrigation can penetrate deeply from the gap.
After mulching, covering the mulching film on the seedling tray with the field fine soil, covering soil with the thickness of 0.5-0.6 cm, compacting the edge of the mulching film with soil, infiltrating irrigation along the irrigation and drainage ditch, wherein the water surface of the infiltrated irrigation does not overflow the seedling tray, so that the fine soil covered on the seedling tray is kept not to infiltrate the seedling tray, and the seedling bed is infiltrated thoroughly.
In the invention, the covered soil surface layer is flush with the edge of the seedling tray. The edges of the mulching film are compacted by using furrow soil to prevent the mulching film from being blown up by wind to lose soil moisture. The mulching film is properly covered with soil and pressed, so that the mulching film is not tightly combined with the soil, a certain pressure or tension can be formed on the mulching film, the rice shoot tips can penetrate through the film to be discharged, weeds can be prevented from penetrating through the film to grow, and the loss of moisture is reduced.
The method of watering is not particularly limited in the present invention, and a watering method known to those skilled in the art may be used. The water level of the water-seeping irrigation can not overflow the seedling tray, the covering soil on the seedling tray is kept not to be soaked, the soil on the bed is seeped thoroughly, the covering soil is kept loose, the purpose is to facilitate seedling emergence, if the covering soil is soaked by the water, a tortoise layer is formed, and the seedling emergence is not facilitated. The bottom of the seedling tray is provided with a plurality of small holes, the bottom of the seedling tray can be tightly combined with the seedling bed after water seeping irrigation, and moisture can be transported upwards through the small holes on the tray bottom. Because of the mulching film, the water-retaining function is high, and the moisture transported upwards through the small holes can completely meet the requirement of seedling growth.
After watering, the invention sprays urea topdressing in the three-leaf period of the seedling, and the whole seedling cultivation period is used for pest control.
In the invention, the application amount of the urea is preferably 3-5 kg/667m2A seedling bed.
In the present invention, the subject of the disease control preferably includes damping off and seedling blight; the target of pest control is preferably Laodelphax striatellus and thrips oryzae. The method for controlling damping-off is preferably as follows: 50 percent of the Shunfu isoprothiolane wettable powder is sprayed to a rice seedling field, and the spraying amount is 667g to 1000g/667m2Spraying 30% hymexazol aqua in the seedling field of 800-1200 g/667m2A seedling bed. The method for preventing and treating the plague is preferably as follows: spraying 2% valia-8 hundred million spores/gram Ceriporia flava suspending agent on a seedling bed, wherein the spraying amount is 100-120 mL/667m275-113 mL of rice seedling bed or 40% isoprothiolane missible oil and 40-50L of water are mixed and diluted, and the obtained diluent is sprayed to 667m2A seedling bed. The method for controlling Laodelphax striatellus or thrips oryzae is preferably as follows: in the period from one leaf to one heart of the seedling, 18g to 20g of 25 percent pymetrozine wettable powder or 30mL to 40mL of 20 percent dinotefuran suspending agent and 40L to 50L of water are mixed and diluted to obtain a diluent which is sprayed with 667m of powder2A seedling bed. If the occurrence amount of the Laodelphax striatellus is large, the Laodelphax striatellus is combined with a 40-mesh insect net for prevention and treatment.
And when the rice seedlings grow strong, lifting and transplanting the seedlings. When transplanting, the degradable film is used and becomes very fragile, the mulching film can be cut along the periphery of the seedling tray by bamboo chips or other tools, and then the tray is uncovered for seedling. The standard for strong rice seedlings is preferably as follows: the seedling age is 30-32 days, and the leaf age is 5-6 leaves; the seedling height is 18-20 cm, the stem base width of a single plant is 0.3-0.4 cm, the average number of tillers of the single plant is 0.3-0.5, the number of white roots is 13-16 per plant, the rooting power is 5-10 per plant, the dry weight of the hundred plants is more than 8.0g, the leaves are wide, thick, straight and elastic, and the leaves are dark green and free of diseases.
The method for cultivating rice seedlings by mulching a plastic film on a machine-transplanted rice seedling tray provided by the invention is described in detail with reference to the following examples, but the method is not to be construed as limiting the scope of the invention.
Example 1
Preparing a seedling bed: a land with flat topography, good drainage and irrigation, convenient transportation, cleanness and no pollution is selected to be used as a seedling bed. The large-scale steel frame greenhouse preparation greenhouse is constructed in a matching way. The proportion of the seedling field is 1:80 (namely, the seedlings grown in 1 mu of seedling field can be transplanted to a field with 80 mu of field). After 18cm of rice seedling field is ploughed, 12cm of rice seedling field is ploughed. And (5) finishing the rice seedling bed to be flat and consistent. And in the later period, the width of the seedling bed is set to be 130cm, wherein the width for laying the seedling tray is 120 cm. The length of the seedling bed depends on the sowing area. A water irrigation and drainage ditch with the width of 20cm and the depth of 20cm is reserved between every two seedling beds, and a 40cm surrounding ditch is dug at the periphery of each seedling bed so as to facilitate irrigation and drainage.
Selecting the garden soil: collecting vegetable garden soil every 667m2100kg of nutrient fine soil is prepared in a field, and 30kg of sieving fine soil which is not fertilized is prepared to be used as film pressing soil.
Nutrient soil fertilization: one month before sowing, each 100kg of garden soil is mixed with 20kg of fully decomposed human and animal manure and special fertilizer (N-P) for rice5O2-K2O is 16-12-14) and 0.40 kg. And after the mixture is fully and uniformly mixed, piling and sealing in a sunny day, wherein the piling and sealing are required to be realized when the piling and sealing are carried out, the mixture is kneaded into a ball by hand, and is scattered when falling to the ground, and the ball is covered and sealed by a film and is thoroughly decomposed for 25 days, so that the fertile soil is thoroughly decomposed. After the decomposed fertile soil is aired, when the water content of the fertile soil is 10% -15%, crushing and sieving are carried out, the diameter of a mesh screen for sieving is 6mm, fine soil below the mesh screen is collected after sieving, and the fine soil with the diameter of 2-4 mm reaching more than 60% is qualified. 0.5kg of seedling strengthening agent is added into every 100kg of qualified fine soil to be mixed, and the nutrient soil is obtained.
Seed preparation: the seedling raising time is generally 30 days earlier than the seedling transplanting time. And (3) raising seedlings before and after 5 months to 25 days in Shandong near-Yi, and transplanting seedlings after 6 months to 20 to 25 days. So as to achieve the purposes of' Ningketian equal-seedling and not equal-seedling.
Selecting rice varieties: selecting excellent varieties with high yield, high quality, strong tillering capability, more ears and grains, disease resistance, lodging resistance and strong stress resistance, and specifically selecting a rice variety adjacent to 16 rice.
Seed treatment: the seeds are sunned for 2-3 days before sowing, every 5kg of rice seeds are soaked in a linear bacterium cleaning and soaking agent solution (12-15 g of 12 percent linear bacterium cleaning and soaking agent is diluted by 6-8 kg of water) for 72 hours, the rice seeds are placed in a shade place to avoid sunshine, and then the rice seeds are stirred and turned over for 1-2 times every day to prevent seed-borne diseases such as rice bakanae disease, aphelenchoides besseyi disease and the like. The rice seeds are soaked and then washed by clear water, stacked in a sowing chamber for one night, and sowed when the seeds are exposed to the white.
And (3) nutrient soil disinfection: sterilizing nutrient soil before sowing, and mixing 65% of fenaminosulf and water according to the weight ratio of 1: the liquid medicine obtained by dilution with the proportion of 1000 is sprayed for disinfection. If not, damping-off and rot easily occur.
Loading nutrient soil into a tray: selecting a bowl plate as a seedling plate, filling the sterilized nutrient soil into the holes of the seedling plate, wherein the thickness of the soil is 2cm, and the surface of the soil is about 0.5cm lower than the edge of the seedling plate. The length and width of a seedling tray used by a common transplanter are 58 x 28cm, and the tray depth is 2.5 cm.
Precision seeding (broadcast seeding): strictly adjusting the seeder and accurately and uniformly seeding. The seeding rate is 5 grains/hole, 448 holes/disc and about 40 discs/mu.
Seedling tray laying: the seedling tray after sowing is flatly laid on the seedling tray in order, so that the seedling tray and the fly edges of the seedling tray are overlapped and arranged, and the tray bottom is tightly attached to the bed surface.
Water spraying: and after the water spraying is finished, the relative water content of the soil in the plate reaches 70-80% so as to prevent the infiltration irrigation.
Film covering: after the seedling tray is laid, mulching film is directly covered on the seedling tray. The double-row swinging plate requires that the width of the mulching film is 150 cm-160 cm, the thickness of the mulching film is 0.008mm, and 30d of degradable film is used. A bare ground gap with the width of 5cm is reserved between the two seedling beds when the film is coated.
Covering with soil: covering the mulching film of the seedling tray with prepared fine soil in the field, wherein the covering thickness is 0.5cm, and the covered soil surface layer is flush with the edge of the tray. The edges of the mulching film are compacted by using furrow soil to prevent the mulching film from being blown up by wind to lose soil moisture.
Punching: after covering soil, punching cross-shaped holes with the diameter of 3cm at intervals of 1m on the inclined plane of the edge of the seedling bed below the bottom of the seedling tray and above the bottom of the irrigation and drainage ditch so as to facilitate the subsequent water infiltration.
Watering: watering along the ditches, wherein the water surface of the seedling ditches can not overflow the seedling tray when watering along the ditches, so that the soil on the seedling tray is kept not to be watered, and the soil on the bed is thoroughly watered.
Topdressing: before and after the three-leaf stage of the seedling, each 667m23kg of urea is applied to the rice seedling field, and the urea is dissolved in water for spraying.
Watering: the moisture requirement of dry seedling raising can be met because the mulching film generally does not need watering in the whole seedling bed period. If severe drought occurs, the disease cannot be recovered even by wilting in the evening, the water can be drenched in the ditch, and the water cannot be drenched.
Disease control: each 667m250 percent of Shunfusoprofen wettable powder 667g is selected for a seedling bed to prevent damping off; 100mL of 2% valia.8 hundred million spores/gram of Ceriporiopsis wax bud suspension is added with 40L-50L of water, and the seedling bed is uniformly sprayed to prevent and control the seedling plague.
Pest control in the seedling bed period: every 667m in the period from one leaf to three leaves218g of 25% pymetrozine wettable powder is mixed with 40L-50L of water in a seedling bed, the seedling bed is uniformly sprayed, pests such as plant hopper, rice thrips and the like are prevented, and attention needs to be paid to the alternate use of different pesticides. If the occurrence amount of the Laodelphax striatellus is large, a 40-mesh insect-proof net can be covered on the net.
Lifting seedlings: transplanting until the rice seedlings reach the standard of strong seedlings, because the used degradable film becomes fragile, the mulching film can be cut along the periphery of the seedling tray by bamboo chips or other tools, and then the tray is uncovered for using the seedlings.
The standard of rice seedling raising by mulching the plastic film on the ground: the seedling age is about 30 days, and the leaf age is about 6 leaves; the seedling height is 18-20 cm, the stem base width of a single plant is 0.3-0.4 cm, the average number of tillers of the single plant is 0.3-0.5, the number of white roots is 13-16 per plant, the rooting power is 5-10 per plant, the dry weight of the hundred plants is more than 8.0g, the leaves are wide, thick, straight and elastic, and the leaves are dark green and free of diseases.
Seedling raising process, using 10m of water3Per mu, the watering times are 1 time, and the seedling raising cost is 100 yuan per mu; can cultivate suitable dry-raised strong seedlings; the yield per mu of the field is 600 kg/mu, and the yield per mu is 550 kg/mu compared with the yield per mu. The income increase per mu is 200 yuan/mu.
Example 2
Preparing a seedling bed: a land with flat topography, good drainage and irrigation, convenient transportation, cleanness and no pollution is selected to be used as a seedling bed. The medium-sized steel frame greenhouse preparation greenhouse is constructed in a matching way. The proportion of the seedling field is 1: 100. After 20cm of rice seedling field is ploughed, 15cm of rotary tillage is carried out. And (5) finishing the rice seedling bed to be flat and consistent. The single-row tray is arranged, the width of the seedling bed is 70cm, and the laying width of the seedling tray is 60 cm. The length of the seedling bed is determined according to the sowing area, a water irrigation and drainage ditch with the width of 30cm and the depth of 23cm is reserved between the seedling beds, and a surrounding ditch with the depth of 50cm is dug at the periphery of the seedling bed so as to facilitate later-stage irrigation and drainage.
Selecting the garden soil: collecting cured dry farmland soil, and preparing amount of the farmland soil: each 667m2100kg of nutrient fine soil is prepared in a field, and 35kg of sieving fine soil which is not fertilized is prepared as film pressing soil (fertilization and acid adjustment are forbidden).
Nutrient soil fertilization: one month before sowing, each 100kg of seedling bed soil is mixed with 20kg of fully decomposed human, animal and poultry manure and special fertilizer (N-P) for rice5O2-K2O: 16-12-14)0.40kg of fertilizer. And after the materials are fully and uniformly mixed, piling and stuffiness are carried out on a sunny day, wherein the piling and stuffiness are required to reach the aim of kneading into a ball by hand, falling into the ground to be scattered, covering and sealing by using a film, and thoroughly decomposing for 28 days to fully decompose the fertile soil. The non-decomposed farmyard manure, urea, ammonium bicarbonate and the like are prohibited to be directly mixed as base fertilizer to prevent the fertilizer from damaging the burnt seedlings. Crushing the decomposed and aired soil when the water content is 15%, and sieving the crushed soil by using a sieve with the diameter of 6mm, wherein the fine soil with the diameter of 2 mm-4 mm reaching 70% is qualified. 0.5kg of seedling strengthening agent is added into every 100kg of refined soil and mixed to obtain the nutrient soil.
Selecting rice varieties: selecting excellent varieties with high yield, high quality, strong tillering capability, more ears and grains, disease resistance, lodging resistance and strong stress resistance, and specifically selecting the rice variety of the temporary rice 20.
Seed preparation: the seedling raising time is prepared 30 days later than the seedling transplanting time. And (3) raising seedlings before and after 5 months to 25 days in Shandong near-Yi, and transplanting seedlings after 6 months to 20 to 25 days. So as to achieve the purposes of' Ningketian equal-seedling and not equal-seedling.
Seed treatment: 3 days before sowing, soaking 5kg of rice seeds in a bacteria cleaning seed soaking agent solution (12-15 g of 12% of the bacteria cleaning seed soaking agent and 6-8 kg of water) for 72h, avoiding sun drying in the shade, stirring and turning for 1-2 times every day, and preventing seed-borne diseases such as rice bakanae disease, aphrodisiac disease and the like. The seeds are cleaned by clean water after being soaked, stacked in a sowing chamber for one night, and sowed after exposing to the air.
And (3) nutrient soil disinfection: sterilizing nutrient soil before sowing, and mixing 65% of fenaminosulf and water according to the weight ratio of 1: spraying the nutrient soil with the liquid medicine obtained by the dilution multiple of 1000 for disinfection. If not, damping-off and rot easily occur.
Loading nutrient soil into a tray: the seedling tray is selected as the blanket tray, the thickness of the soil is about 1.8cm, and the surface of the soil is 0.5cm lower than the edge of the seedling tray. The length and width of a seedling tray used by a common transplanter are 58 x 27.5cm, the depth of the seedling tray is 2.2cm, and the seedling trays matched with different machines are different.
Precision seeding (broadcast seeding): strictly adjusting the seeder and accurately and uniformly seeding. The seeding amount of the blanket disc is 110 g/disc, and the seeding amount of the blanket disc is 35 discs/mu.
Seedling tray laying: the seedling tray after sowing is flatly laid in order, so that the seedling tray and the fly edges of the seedling tray are overlapped and arranged, and the tray bottom is tightly attached to the bed surface.
Water spraying: and after the paving is finished, spraying water to enable the relative water content of the soil in the tray to reach 70% so as to prevent infiltration of the water.
Film covering: after the seedling tray is laid, mulching film is directly covered on the seedling tray. The double-row swinging plate requires that the width of the mulching film is 150-160 cm, the single-row swinging plate requires that the width of the mulching film is 90-100 cm, and the thickness of the mulching film is 0.008mm, preferably 30 d. A bare ground gap with the width of 10cm is reserved between the two seedling beds when the film is coated.
Covering with soil: and covering the mulching film with fine soil sieved in advance after film covering, wherein the covering thickness is 0.5cm, and the covered soil surface layer is flush with the edge of the seedling tray. And (3) soil compacting at the membrane edge: the edges of the mulching film are compacted by using furrow soil to prevent the mulching film from being blown up by wind to lose soil moisture.
Punching: after covering soil, punching a cross hole with the diameter of 5cm on the inclined plane of the edge of the seedling bed every 1m or so below the bottom of the seedling tray and above the bottom of the irrigation and drainage ditch so as to facilitate water permeation of feathering and irrigation.
Watering: after the plastic film is covered and compacted, the furrow-creeping irrigation is carried out, the water surface of the seedling furrow can not spread over the seedling tray during the creeping irrigation, the soil covering on the seedling tray can not be soaked, and the soil of the bed can be drenched.
Topdressing: before and after the three-leaf stage of the seedling, each 667m25kg of urea is applied to the rice seedling field, and the urea is dissolved in water for spraying.
Watering: the moisture requirement of dry seedling raising can be met because the mulching film generally does not need watering in the whole seedling bed period. If severe drought occurs, the disease cannot be recovered even by wilting in the evening, the water can be drenched in the ditch, and the water cannot be drenched.
Disease control: each 667m2800-1200 g of 30% metalaxyl-hymexazol aqua is selected for the seedling bed to prevent damping off; 75-113 mL of 40% isoprothiolane missible oil and 40-50L of water are selected, and the seedling bed is uniformly sprayed to prevent and control the seedling plague.
Pest control in the seedling bed period: every 667m in the period from one leaf to three leaves230-40 mL of 20% dinotefuran suspending agent is mixed with 40-50L of water in a seedling bed, and the seedling bed is sprayed uniformly to prevent pests such as laodelphax striatellus, rice thrips and the like. If the occurrence amount of the Laodelphax striatellus is large, a 40-mesh insect-proof net can be covered on the net.
Lifting seedlings: when transplanting, the degradable film is used and becomes very fragile, the mulching film can be cut along the periphery of the seedling tray by bamboo chips or other tools, and then the tray is uncovered for using the seedlings.
The standard of rice seedling raising by mulching the plastic film on the ground: the seedling age is about 30 days, and the leaf age is about 6 leaves; the seedling height is 18-20 cm, the stem base width of a single plant is 0.3-0.4 cm, the average number of tillers of the single plant is 0.3-0.5, the number of white roots is 13-16 per plant, the rooting power is 5-10 per plant, the dry weight of the hundred plants is more than 8.0g, the leaves are wide, thick, straight and elastic, and the leaves are dark green and free of diseases.
In the process of seedling culture, 60m of water is used3Per mu, the watering times are 2 times, and the seedling raising cost is 110 yuan per mu; can cultivate suitable dry-raised strong seedlings; the yield per mu of the field is 650 kg/mu, and the yield per mu is 550 kg/mu. The income and benefit per mu are 180 yuan/mu.
According to the embodiment, compared with the conventional tray seedling raising method, the novel seedling raising method provided by the invention saves water by 100-150 m3Per mu, reducing the irrigation times for 3-5 times, and saving the seedling raising cost by 50 yuan per mu; can cultivate suitable dry-raised strong seedlings; the yield of each mu of field is increased by 50-80 kg/mu. And increasing the net income by 180-260 yuan/mu per mu.
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 (10)
1. A method for cultivating dry seedlings by rice mulching film machine transplanting discs is characterized by comprising the following steps:
(1) making seedling beds on a ploughed, rotary-tilled and leveled field, digging irrigation and drainage ditches with the width of 20-30 cm and the depth of 18-25 cm between the seedling beds, drilling cross holes on the side walls between the seedling beds and the irrigation and drainage ditches, and digging enclosing ditches with the width of 40-50 cm and the depth of 30-40 cm at the periphery of the seedling beds to obtain a seedling bed;
(2) mixing and decomposing screened field fine soil, human, livestock and poultry manure and special rice fertilizer, screening and refining decomposed fertilizer soil, collecting undersize fine soil, mixing with a seedling strengthening agent, and sterilizing to obtain nutrient soil;
(3) filling the nutrient soil into each hole of the seedling tray, wherein the height of the nutrient soil is 0.3-0.5 cm lower than the edge of the seedling tray, so as to obtain the seedling tray filled with the nutrient soil;
(4) sowing the rice seeds exposed to the white into the holes of the seedling trays filled with the nutrient soil, flatly paving the seedling trays on a seedling bed after sowing, and overlapping the seedling trays and the flashes of the seedling trays;
(5) spraying water to the seedling tray which is tiled on the seedling bed in the step (4), and finishing spraying water when the relative water content of the nutrient soil in the seedling tray reaches 70-80%;
(6) covering a mulching film on the seedling tray sprayed with water in the step (5), wherein the thickness of the mulching film is 0.005-0.011 mm, and a bare land gap with the width of 5-10 cm is reserved between every two seedling beds when the mulching film is covered;
(7) covering the mulching film obtained in the step (6) with the fine field soil sieved in the step (2), wherein the thickness of the covering soil is 0.5-0.6 cm, compacting the edge of the mulching film with soil, infiltrating irrigation along the irrigation and drainage ditch, wherein the water surface of the infiltrated irrigation does not overflow a seedling tray, the fine soil covered on the seedling tray is kept not to be infiltrated, and the soil of the seedling tray is infiltrated thoroughly;
(8) spraying urea topdressing in the three-leaf period of the seedlings, and performing pest control in the whole seedling cultivation period;
there is no time sequence restriction between the step (1) and the step (2).
2. The method according to claim 1, wherein the pitch of the cross holes in the step (1) is 1-1.5 m, and the diameter of the cross holes is 3-5 cm.
3. The method as claimed in claim 1, wherein in step (1), if the seedling trays are arranged in two rows, the width of the seedling bed is 130cm, and the width for laying the seedling trays is 120 cm;
if the seedling tray is arranged in a single row, the width of the seedling bed is 70cm, and the width of the seedling tray is 60 cm.
4. The method as claimed in claim 1, wherein the mass ratio of the field fine soil, the human and animal manure and the special rice fertilizer sieved in the step (2) is 100: 20: 0.4;
the mass ratio of the undersize fine soil to the seedling strengthening agent is 100: 0.5.
5. the method according to claim 1, wherein the medical solution for sterilization in the step (2) is a fenaminosulf solution; the dixolone solution is prepared by mixing dixolone with the mass concentration of 65% and water according to the volume ratio of 1: 1000 to obtain.
6. The method according to claim 1, wherein in step (4) the seedling tray comprises a bowl tray or a blanket tray;
when the seedling disc is a bowl disc, the seeding quantity of the bowl disc is 3-5 grains/hole, the specification of the bowl disc is 448 holes/disc, and the tiling density of the bowl disc is 35-40 discs/mu;
when the seedling tray is a blanket tray, the seeding amount of the blanket tray is 90-110 g/tray, and the density of the blanket tray is 30-35 trays/mu.
7. The method according to claim 1, wherein the method for treating the rice seeds exposed to white in the step (4) comprises the steps of:
A. drying the rice seeds in the sun for 2d to 3 d;
B. and (3) soaking the aired rice seeds in a fungus cleaning seed soaking agent for 72h, stirring and turning for 1-2 times every day, cleaning with clear water, and stacking for 10-14 h at the temperature of 20-27 ℃ to obtain the exposed rice seeds.
8. The method of claim 1 or 7, wherein the bare rice seed comprises Oryza sativa 16, Oryza sativa 20, Oryza sativa 14, or Shannon 601.
9. The method according to claim 1, wherein the urea is applied in the step (8) in an amount of 3-5 kg/667m2A seedling bed.
10. The method according to claim 1, wherein the subject of disease control in step (8) comprises damping off and seedling blight; the target of insect pest control is Laodelphax striatellus and thrips oryzae;
the method for preventing and treating damping-off comprises the following steps: 50 percent of the Shunfu isoprothiolane wettable powder is sprayed to a rice seedling field, and the spraying amount is 667g to 1000g/667m2Spraying 30% hymexazol aqua in the seedling field of 800-1200 g/667m2Seedling beds;
the method for preventing and treating the plague comprises the following steps: spraying 2% valia-8 hundred million spores/gram Ceriporia flava suspending agent on a seedling bed, wherein the spraying amount is 100-120 mL/667m275-113 mL of rice seedling bed or 40% isoprothiolane missible oil and 40-50L of water are mixed and diluted, and the obtained diluent is sprayed to 667m2Seedling beds;
the method for preventing and controlling the Laodelphax striatellus or the rice thrips comprises the following steps: in the period from one leaf to one heart of the seedling, 18g to 20g of 25 percent pymetrozine wettable powder or 30mL to 40mL of 20 percent dinotefuran suspending agent and 40L to 50L of water are mixed and diluted to obtain a diluent which is sprayed with 667m of powder2A seedling bed.
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| CN104303920A (en) * | 2014-11-21 | 2015-01-28 | 安徽喜洋洋农业科技有限公司 | Method for cultivating machine-transplanted seedlings on organic selenium nutrient soil |
| CN107494091A (en) * | 2017-09-05 | 2017-12-22 | 汉中市农业技术推广中心 | Cultivate the method for raising seedling for strengthening seedling at the machine-transplanted rice overlength length of time rice seedlings grow in a kind of wheat-rice rotation area |
| CN107810809A (en) * | 2017-11-08 | 2018-03-20 | 广西沙田仙人滩农业投资有限公司 | A kind of new matrix of rice is without native dry rice seedling method |
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| CN104303920A (en) * | 2014-11-21 | 2015-01-28 | 安徽喜洋洋农业科技有限公司 | Method for cultivating machine-transplanted seedlings on organic selenium nutrient soil |
| CN107494091A (en) * | 2017-09-05 | 2017-12-22 | 汉中市农业技术推广中心 | Cultivate the method for raising seedling for strengthening seedling at the machine-transplanted rice overlength length of time rice seedlings grow in a kind of wheat-rice rotation area |
| CN107810809A (en) * | 2017-11-08 | 2018-03-20 | 广西沙田仙人滩农业投资有限公司 | A kind of new matrix of rice is without native dry rice seedling method |
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