CN108651194B - Cultivation method for reducing mechanical rolling and improving yield of ratoon rice - Google Patents
Cultivation method for reducing mechanical rolling and improving yield of ratoon rice Download PDFInfo
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Abstract
The invention discloses a cultivation method for reducing mechanical rolling and improving the yield of direct-seeded rice, which comprises the following steps: (1) selecting varieties; (2) preparing land for growing field crops: before sowing, rotary tillage and stubble cleaning are carried out, weeds are buried, and irrigation and field soaking are carried out until the sowing is finished; (3) rice seed disinfection and germination acceleration: sterilizing and disinfecting the seeds with a lime clarified solution, soaking the seeds to break the breast, and coating the soaked and whitened seeds with a dry-raised nurse to form particles; (4) sowing; (5) fertilizer application: the first season, the regenerated season base fertilizer and the additional fertilizer are all applied, and the first season base fertilizer is nitrogen-phosphorus-potassium compound fertilizer; (6) water content management: after sowing, the seedlings emerge to three leaves and one core in the first season, the seedlings are aligned to be mature and naturally dry, and drainage ditches are unobstructed and drain water; (7) harvesting in the first season; (8) weed control: adopting one-sealing two-supplementing three-killing, sowing till turning green, and applying the tillering fertilizer in a mixing way; (9) and (4) pest control. The operation is simple and convenient, the grinding of the machine to the rice stake is effectively reduced, the group light transmission and air permeability are improved, and the yield of the direct seeding regenerated rice is improved.
Description
Technical Field
The invention relates to the technical field of rice cultivation, in particular to a cultivation method for reducing mechanical rolling of rice stakes and improving yield of direct-seeded rice.
Background
The regenerated rice is the rice harvested in one season by planting again the first season axillary buds after the rice harvested in the first season. In the areas where the heat of planted rice in one season is excessive and the heat of planted double-season rice is insufficient, the method is one of effective measures for improving the multiple cropping index and increasing the rice yield and the economic income of a rice field in unit area. Compared with double cropping rice farming and paddy-upland rotation farming, the regenerated rice has the advantages of water and fertilizer conservation, good rice quality, high economic benefit and the like, has gradually developed into an important rice planting system in China, and has the harvest area of 73 kilohm2. As the economic development of China, the labor force of the main rice farming areas in south is transferred to the developed areas along the sea, so that the labor force is short. Direct seeding regenerated rice is increasingly emphasized as a simple, labor-saving and efficient cultivation method, and becomes an important measure for relieving the contradiction of labor tension in double-robbing seasons of double cropping rice areas in south, reducing labor cost and improving rice quality. However, the seeding density of direct-seeding rice is relatively large, the light transmission and air permeability in a rice field group are poor, the occurrence of plant diseases and insect pests is serious, and the late-stage lodging of rice is serious, so that the popularization of direct-seeding regenerated rice is restricted. At the same time, the user can select the desired position,with the improvement of the mechanized level of rice harvesting in China, the mechanized degree of rice in 2016 reaches 80 percent in China. However, compared with conventional rice cropping, the rolling area of the walking crawler of the rice harvester is large, the rolling damage to rice piles is serious, and the secondary ear-picking of the rice piles and the final yield of the regenerated rice are seriously influenced. Therefore, how to improve the cultivation method of the ratoon rice, reduce mechanical rolling, improve the ecological environment of rice groups and improve the yield of the ratoon rice becomes an important problem for solving the development bottleneck of the ratoon rice.
Since 2015, patent development team members have conducted research work on cultivation techniques to reduce mechanical crushing and increase yield of direct-seeded ratooned rice. The fixed-point test of Yanghua in the Yangtze river in Hubei province indicates that compared with machine-transplanted ratoon rice, the yield of the direct-seeded ratoon rice is reduced by 8.0-11.5 percent, and the reason is that the light transmittance and the air permeability of the direct-seeded rice population are reduced. Research on agricultural yield of Jiangling three lakes in Hubei province discovers that compared with manual harvesting, the rice piles are seriously damaged after mechanical harvesting of direct-seeded rice in first seasons, germination and growth of the rice piles are influenced, and finally yield is reduced by 10.1-15.2%. Therefore, the method optimizes the direct seeding and regeneration rice cultivation technology, improves the ecological environment of direct seeding rice groups, reduces mechanical rolling, and has important significance for guaranteeing the efficient production of Hubei province rice. According to the problems in the cultivation process of the direct-seeding ratoon rice, the research on cultivation technology for reducing mechanical rolling, improving ecological environment of direct-seeding ratoon rice population and increasing yield is carried out by patent development group members in 2016 + 2017 in Jianghan plain, a breakthrough is obtained in subject technologies such as fertilizer application, seeding density, seeding mode, field management and the like, technical demonstration is carried out in Guanghua of the Yangtze river, and the technology is further popularized.
Disclosure of Invention
Based on the defects of the existing direct-seeding ratoon rice cultivation, the invention aims to solve the problems of poor light transmission and air permeability of direct-seeding rice groups and reduced yield caused by large rolling area of rice piles by mechanical harvesting, and provides a cultivation method for reducing mechanical rolling and improving the yield of direct-seeding rice. The method is simple and easy to operate, can effectively reduce the mechanical grinding of the rice stakes, improves the group light transmission and air permeability, and improves the yield of the direct seeding regenerated rice.
In order to achieve the purpose, the following technical measures are adopted by the invention:
a cultivation method for reducing mechanical rolling and improving the yield of direct-seeded rice comprises the following steps:
(1) variety selection: selecting medium-maturing varieties with low temperature resistance, strong tillering capability, developed root systems, strong stalks, large spike types, strong lodging resistance and moderate growth period. The variety is any one of Huanghuazhan, Xinliangyou 223, Fengliangyou No. two, Tianliangyou 616, Yongyou 4949 and the like.
(2) Preparing land for growing field crops: rotary tillage and stubble cleaning are carried out 10-20 days before sowing, weeds are buried, irrigation and field soaking are carried out until 2-3 days before sowing, and field blocks are raked up to a waterless layer and the weeds manually or mechanically (normally). Then a plane 'carriage as' system between the seeding carriage and the mechanical walking channel is scribed by a scriber (common).
In the step, the width of the sowing compartment is 74-76 cm, and is matched with the track gauge of a full-feeding crawler harvester such as a long-term field maintenance harvester, a scenic spot harvester and the like.
In the step, the mechanical walking track is 45-46 cm wide, does not sow and is matched with the track width of a full-feeding crawler harvester for long-time field protection, scenic customs and the like.
(3) Rice seed disinfection and germination acceleration: sterilizing the seeds with 1% (mass ratio) of lime clear liquor or 300 times diluted strong chlorine, soaking the seeds to break breast, and coating the seeds exposed to the seeds with dry-breeding nurse into granules.
(4) Sowing: in the middle of 4 months, the seeds are sown on the compartment surface in sunny days.
The seeding rate in the step is 22.5 kg-30.0 kg/hm of hybrid rice260.0 kg-75.0 kg/hm of conventional rice2The seeds are sowed on the surface of the compartment, and compared with the sowing density of the rice field without the mechanical walking path, the sowing density of the surface of the compartment is improved by 20-30%.
(5) Fertilizer application: the first season and the regeneration season are both applied with base fertilizer and additional fertilizer; the first season base fertilizer mainly comprises a nitrogen-phosphorus-potassium ternary compound fertilizer or urea, and the tillering fertilizer and the flower retention fertilizer mainly comprise urea; and applying a bud promoting fertilizer and a seedling extracting fertilizer in a regeneration season.
In the step, the nitrogen fertilizer 1 is applied in the first season according to the principle of' density increasing, nitrogen reducing, phosphorus adding and potassium increasing20-135kg N/hm2The base fertilizer comprises the following components in percentage by mass: and (3) tillering fertilizer: the flower protecting fertilizer is 4.5:3:2.5 nitrogen topdressing fertilizer; applying 70-90kg of P in first season2O5/hm2150kg/hm together with potassium fertilizer 120-2The phosphate fertilizer and potash fertilizer are mainly calcium superphosphate and potassium chloride, and are all applied as base fertilizer.
In the step, 60-80kg of N/hm is applied 15 days after the first season and the heading for the regeneration season bud promoting fertilizer2The seedling raising fertilizer is harvested for 3 days in the first season and then applied with water in a way of being matched with irrigation in 60-80kg of N/hm2Mainly urea.
(6) Water content management: after sowing, seedling emergence is carried out till the first season until three leaves and one heart, the field is kept moist, and then shallow water of about 2cm is kept to be alternated with natural drying; draining water and drying the field in the last ten days of 5 months to 6 months in due time according to the seedling condition; a shallow water layer with a long heading period of about 2cm is alternated with natural drying, a water layer at a booting period is managed, the water layer is naturally dried after heading is completed until the water layer is mature, and the water layer is mainly dried, so that the relative water content in the field is not lower than 85%; 10-15 days before maturity, the drainage ditch is noticed to be unobstructed, drainage is timely, and the problems that the soil moisture is too high and rice stubbles are seriously rolled by machinery in the mature harvest period are prevented.
(7) Harvesting in the first season: and axillary buds grow out on the mature period of the first season rice and are harvested.
(8) Weed control: the principle of one-sealing two-supplementing three-killing is adopted. When the seedlings are sowed to be turned green, the tillering fertilizer is applied in a mixing way, any one of glyphosate, cyhalofop-butyl, pretilachlor or oxamide matched with bensulfuron methyl and the like is determined to be used according to the type of local weeds, and the water layer and the water level in the whole field are strictly executed with the standard that the seedling growing point is not submerged; when weeding is not thorough in the green turning period, the spraying type herbicide is reasonably selected to kill weeds as soon as possible according to the types of weeds in the field.
(9) And (3) pest control: and the principle of preventing main and comprehensive control is adhered to. The method has the advantages of dry-raised nursery coat before sowing, transplanting seedlings with pesticide (30% of benzyl propiconazole missible oil), sowing in fields, reasonable close planting, scientific fertilization, water management, light trapping and killing, biological control (sex attractant, vetiver planting, rice stem borer releasing trichogramma and the like) combination, and effective prevention and control of banded sclerotial blight, rice blast, snout moth's larva and rice planthopper.
Preferably, in the step (1), the low-temperature weather at the sowing period is prevented, and the growing period of the medium-maturing variety is 120-; meanwhile, the variety has stronger regeneration capability. The variety includes Huanghuazhan, Xinliangyou 223, Fengliangyou No. two, Tianliangyou 616, Yongyou 4949, etc. (partial patent relating to "a method for high-yield cultivation of directly seeded regenerated Rice (application No.: 201710203368.1)" first step "variety selection")
Preferably, said dry-raised nurse seeds in step (3) are coated at 1kg per 300g of dry-raised nurse coated seeds.
Preferably, the seeding time in the step (4) is 4 months and 5 days to 4 months and 15 days, and the average daily temperature is stabilized at about 14 ℃.
Preferably, the regenerated season bud promoting fertilizer in the step (5) is applied with 60-80kg of N/hm 15 days after the first season is flush with the ears2The seedling raising fertilizer is harvested for 3 days in the first season and then applied with water in a way of being matched with irrigation in 60-80kg of N/hm2。
Preferably, in the step (6), before the rice is sowed, the water layer is drained, and the soil is kept moist.
Preferably, in the step (6), the tillering and draining of the rice field is performed by taking the white root exposed by the dry cracking of the soil as a standard.
Preferably, the rice in the step (7) is harvested when the overall maturity of the rice reaches 90%.
Preferably, the harvester in the step (7) strictly runs on a mechanical walking path with a width of 45cm reserved in advance, and the height of the rice piles is kept to be 30-40cm for reducing rolling damage to sprouting and sprouting of the rice piles. (partial patent relating to 'a method for high-yield cultivation of direct-seeding regenerated rice (application No. 201710203368.1)' eighth step 'first season harvest')
Preferably, in the step (8), the sowing time can be 1.5L hm of 10% butachlor-2Matched with bensulfuron-methyl 0.45kgL-1Controlling weeds, draining water until most of the weeds are exposed before spraying, watering for 3-5 cm after spraying for 1-2 days, and retaining water for 5-7 days; the later stage weeds are controlled by using corresponding high-efficiency, low-toxicity and low-residue pesticides.
Preferably, in the step (9), the plant diseases and insect pests are mainly used for preventing and treating sheath blight, rice blast, borer and rice planthopper, and the medicament is sprayed for preventing in the tillering stage and the crevasse stage.
According to the technical measures of the nine steps, aiming at the problems that the yield of the direct-seeding regenerated rice is reduced due to mechanical rolling when the first season rice is harvested, and the like, the rice pile rolling caused by mechanical harvesting of the first season rice is reduced, the ecological environment of a rice group in a planting compartment is improved, and the yield of the direct-seeding regenerated rice is improved by arranging a compartment operation system with a sowing compartment and a walking channel matched. The key steps of the invention lie in that a ' carriage operation ' system of matching a seeding carriage and a walking channel ' of field soil preparation in the second step is constructed, which is different from the prior field soil preparation, and finally determined by matching the seeding carriage and the walking channel, matching with machinery and analyzing and researching through corresponding field test needles: the width of the sowing compartment is 75cm, and the sowing compartment is matched with the track gauge of a full-feeding crawler harvester such as a long-time field protection harvester, a scenic spot harvester and the like; the mechanical walking track is 45cm wide, is not sown and is matched with the track width of a full-feeding crawler harvester such as a long-time field protection harvester, a scenic spot harvester and the like, the configuration can effectively reduce the rolling of rice by a mechanical harvesting team, is beneficial to the light transmission and the ventilation of rice groups in a sowing compartment, and plays a role in edge effect. The other key step of the method is fertilizer application in the fifth step, which is different from the prior fertilizer application, because the paddy is only directly sown on the compartment surface, the sowing density is increased by 20-30%, and the nitrogen fertilizer application is reduced by about 30% based on the principle of 'density increasing and nitrogen reducing', which is beneficial to preventing rice from lodging.
Compared with the prior art, the invention has the following advantages and effects:
(1) the invention can effectively reduce the mechanical rolling of the rice stump and improve the growth of the axillary bud of the rice stump.
(2) Rice population CO of the invention2The concentration can be obviously improved by 35 to 45 percent compared with the rice field without a mechanical walking path, and the photosynthesis is finally improved by 25 to 34 percent.
(3) Compared with a rice field without a mechanical walking path, the invention improves the effective ear per mu by 4.1-4.8 percent and the maturing rate by 2.7-3.5 percent, and increases the yield of the ratoon rice by 2-14.2 percent.
Detailed Description
The following examples are intended to further illustrate the present invention, and unless otherwise indicated, the technical means used in the examples are conventional means well known to those skilled in the art, and the starting materials used are all commercially available.
Example 1:
a cultivation method for reducing mechanical rolling and improving the yield of ratoon rice comprises the following steps:
(1) field preparation: after harvesting the previous crops, selecting systemic chemical herbicide glyphosate 20 days before sowing, irrigating the field after applying the glyphosate for 3 days, soaking the field for 3 days, rotary tillage and stubble cleaning, turning over and burying weeds, irrigating and soaking the field for 2-3 days before sowing, raking the field by manpower or machinery, and then marking a compartment operation system with a 75cm sowing compartment and a 45cm mechanical walking track alternated by a marker.
(2) Sowing: 60kg of Huanghua is selected in the field per hectare. Soaking seeds to break the chest for 3 days, and coating the dewy seeds into granules according to 300g of dry-raised nurse of 1kg of seeds. Sowing on the carriage surface from 4 months and 5 days to 4 months and 15 days. The compartment surface is kept wet until the seeds emerge to three leaves and one heart. The variety also comprises any one of Xinliangyou 223, Fengliangyou No. two, Tianliangyou 616, Yongyou 4949 and the like.
(3) Fertilizer application: according to the principle of 'density increasing, nitrogen reducing, phosphorus adding and potassium increasing', nitrogen fertilizer 130kg N/hm is applied in the first season2The base fertilizer comprises the following components in percentage by mass: and (3) tillering fertilizer: the flower protecting fertilizer is 4.5:3:2.5 nitrogen topdressing fertilizer; 80kg of P is applied in first season2O5/hm2With 120kg/hm of potassium oxide2The fertilizer is used as a base fertilizer for one-time application, and the base fertilizer and the additional fertilizer are both applied by broadcasting. The regeneration season sprout promoting fertilizer is applied with 75kg N/hm 15 days after the first season and the spike are aligned2The seedling raising fertilizer is harvested for 3 days in the first season and then applied with 75kg of water in a matched mode2。
(4) Water content management: sowing to three centers and one center, and keeping the surface of the field wet; in the seedling stage, a shallow water layer is kept; in the tillering stage, dry and wet are alternated, and when the number of spikes reaches 80% of the expected number, the field is sunned for 6 days; in the jointing and booting stage, wetting and irrigating; keeping a 2cm shallow water layer in the heading period; grouting period, alternate dry and wet; immediately after harvesting, the plants were flooded with water and alternately wet and dry.
(5) And (3) other field management: in the early stage of the field, 1.5L hm of 10 percent butachlor per hectare is selected-20.45kg L of bensulfuron methyl-1And (6) sealing. The prevention and control of diseases and pests such as snout moth's larva (Ostrinia nubilalis, Chilo suppressalis), rice planthopper, banded sclerotial blight, rice false smut, etc. are well emphasized during the growth of rice, and the selection of the high-efficiency low-toxicity low-residue ricePesticide is left and physical methods such as an insect catching lamp are used for timely prevention and control.
(6) Harvesting and straw treatment: and harvesting when more than 95% of rice ears are yellow and ripe. The harvester strictly runs on a reserved mechanical walking path with the width of 45cm, reduces the grinding damage to the rice stake germination, and keeps the rice stake height of 30-40 cm. The straw is crushed and covered on the walking path, so that the influence of covering of the rice stump mother stem by a large amount of crushed straw collected by a machine is avoided, and meanwhile, the soil is fertilized.
The invention reduces rice stake rolling caused by mechanical harvesting of first season rice by arranging a 'compartment crop' system with a sowing compartment matched with a walking channel and matching with machinery, improves the light-transmitting and air-permeable conditions of rice groups in the sowing compartment, exerts the edge effect thereof and provides a cultivation method for improving the yield of ratoon rice.
2016-plus 2017, a direct seeding and regeneration rice compartment culture technical test is developed on Guanhua farms in the Yangtze river. Each cell of the experiment adopts a completely random design, and the total number of the cells is 4: the mechanical walking channel treatment (CK), the 40cm mechanical walking channel treatment, the 45cm mechanical walking channel (DN3) and the 50cm mechanical walking channel are not arranged, each treatment sowing compartment is 75cm, and the treatment sowing compartments are repeated for 3 times, and the total number of the treatment sowing compartments is 12. The application standard of nitrogen, phosphorus and potassium of the first season rice is 130kg N hm-2,80kg P2O5hm-2,120kg K2O hm-2The phosphorus-potassium fertilizer is used as a base fertilizer for one-time application; the first-season nitrogen fertilizer is applied by urea in a ratio of 4.5:3:2.5 in a tillering stage and a tillering stage. The regeneration season sprout promoting fertilizer is applied with 75kg N/hm at the surface 15 days after the first season and the heading2Harvesting the seedling-raising fertilizer in the first season for 3 days and applying 75kg of N/hm on the surface2. Area of each cell is 36m2Ridges are arranged between the communities and are coated with films, and the height of the ridges is 30 cm. The rice variety is selected from Huanghuazhan, the seeding quantity is 60kg hm2。
2016 and 2017, 11 months earlier, the research and development group harvested direct-seeded ratoon rice on Guanghua farms in the Yangtze river, Hubei province, and performed yield measurement. The invention obviously improves the yield of the direct seeding ratoon rice. Compared with the conventional direct seeding cultivation, the method has the advantages that the effective ear and seed setting rate of the ratoon rice is remarkably improved by 4.1-4.8% and 2.7-3.5%, so that the yield of the ratoon rice is increased by 2-14.2% (Table 1). For each treated rice group CO2The monitoring of the concentration showsCompared with the conventional direct seeding cultivation, the technology is adopted to cultivate the rice population CO2The concentration is increased by 8.1-14.9%, and the photosynthesis is finally improved by 22.8-33.1% (table 2).
TABLE 1 yield and composition of direct-seeded ratooning rice with different treatments
TABLE 2 Net photosynthetic Rate and CO for different treatments of direct-seeded ratooning rice2Variation of concentration
The foregoing examples are set forth to illustrate the present invention more clearly and are not to be construed as limiting the scope of the invention, which is defined in the appended claims to which the invention pertains, as will be apparent to those skilled in the art, after reading the present invention.
Claims (7)
1. A cultivation method for reducing mechanical rolling and improving the yield of direct-seeded rice comprises the following steps:
(1) variety selection: selecting medium-maturing varieties with low temperature resistance, strong tillering capability, developed root systems, strong stalks, large spike types, strong lodging resistance and moderate growth period; the variety is any one of Huanghuazhan, Xinliangyou 223, Fengliangyou No. two, Tianliangyou 616 and Yongyou 4949;
(2) preparing land for growing field crops: carrying out rotary tillage and stubble cleaning 10-20 days before sowing, burying weeds, irrigating and soaking the fields to 2-3 days before sowing, raking field blocks to a waterless layer and the weeds manually or mechanically, and then marking out a plane compartment as a system with a sowing compartment and a mechanical walking channel arranged alternately by using a marker;
the width of the sowing compartment is 74-76 cm, and is matched with the track gauge of a long-time field-protection and view-control full-feeding crawler harvester;
the mechanical walking track is 45-46 cm wide, does not sow and is matched with the track width of a long-time field-preserving and scenic-custom full-feeding crawler harvester;
(3) rice seed disinfection and germination acceleration: sterilizing and disinfecting the seeds with 1% of lime clarified liquid or 300 times diluted strong chlorine essence, soaking the seeds to break the breast, and coating the seeds soaked with the white seeds with a dry-raised nurse into particles;
(4) sowing: in the middle ten days of 4 months, sowing seeds on the compartment surface in sunny days;
the seeding rate is 22.5 kg-30.0 kg/hm of hybrid rice260.0 kg-75.0 kg/hm of conventional rice2The seeds are sowed on the surface of the compartment, and the sowing density of the surface of the compartment is improved by 20-30% compared with that of the conventional direct-seeding ratoon rice field;
(5) fertilizer application: the first season, the regenerated season base fertilizer and the additional fertilizer are all applied in a broadcasting way, the first season base fertilizer is nitrogen-phosphorus-potassium ternary compound fertilizer or urea, the tillering fertilizer and the flower protecting fertilizer are urea, and the regenerated season is applied with the bud promoting fertilizer and the seedling lifting fertilizer;
the first-season nitrogen application fertilizer is 120-kg N/hm2The base fertilizer comprises the following components in percentage by mass: and (3) tillering fertilizer: the flower protecting fertilizer is 4.5:3:2.5 nitrogen topdressing fertilizer; applying 70-90kg of P in first season2O5/hm2150kg/hm together with potassium fertilizer 120-2All the fertilizer is applied as base fertilizer;
the regeneration season sprout promoting fertilizer is applied with 60-80kg N/hm 15 days after the first season and the spike are aligned2The seedling raising fertilizer is harvested for 3 days in the first season and then applied with water in a way of being matched with irrigation in 60-80kg of N/hm2Is urea;
(6) water content management: after sowing, the seedlings emerge to three leaves and one heart in the first season, the field is kept moist, and then the seedling is kept 2cm and naturally falls to dry alternately; in the last ten days of 5 months to the last 6 months, the field is dried according to the seedling condition; the 2cm long ear stage and natural falling dry are alternated, the water layer management is carried out in the booting stage, the water layer management is carried out after the ears are leveled up until the ears are mature and naturally fall dry, the dry is taken as the main, and the relative water content in the field is ensured to be not lower than 85%; draining water in a smooth drainage ditch 10-15 days before maturation;
(7) harvesting in the first season: axillary buds grow out on the mature period of the first season rice and are harvested;
(8) weed control: adopting one-sealing two-supplementing three-killing, sowing till turning green, combining with tillering fertilizer application, mixing and applying, and determining to use any one of glyphosate, cyhalofop-butyl, pretilachlor or butachlor and bensulfuron-methyl according to the type of local weeds;
(9) and (3) pest control: dry-raised nurse dressing before sowing and transplanting seedlings with medicines are realized: the 30% benzyl propiconazole missible oil is used for field sowing, reasonable close planting, scientific fertilization, water management, light trapping and killing and biological control.
2. The cultivation method for reducing mechanical rolling and improving the yield of direct-seeded rice according to claim 1, wherein the cultivation method comprises the following steps: the growth period of the medium-maturing variety in the step (1) is 120-135 days.
3. The cultivation method for reducing mechanical rolling and improving the yield of direct-seeded rice according to claim 1, wherein the cultivation method comprises the following steps: and (3) coating the dry-raised nurse seeds in the step (3), wherein 1kg of dry-raised nurse coated seeds is coated in each 300g of dry-raised nurse coated seeds.
4. The cultivation method for reducing mechanical rolling and improving the yield of direct-seeded rice according to claim 1, wherein the cultivation method comprises the following steps: in the step (4), the seeding time is 4 months and 5 days to 4 months and 15 days, and the daily average temperature is stabilized at 14 ℃.
5. The cultivation method for reducing mechanical rolling and improving the yield of direct-seeded rice according to claim 1, wherein the cultivation method comprises the following steps: and (4) in the step (6), tillering, draining and drying the rice in the sun by taking the white root exposed by soil drying crack as a standard.
6. The cultivation method for reducing mechanical rolling and improving the yield of direct-seeded rice according to claim 1, wherein the cultivation method comprises the following steps: and (5) in the step (7), the harvester runs on a mechanical walking path with the width of 45cm reserved in advance, and the height of the rice piles is 30-40 cm.
7. The cultivation method for reducing mechanical rolling and improving the yield of direct-seeded rice according to claim 1, wherein the cultivation method comprises the following steps: in the step (8), the 1.5L hm of butachlor with the concentration of 10 percent is selected at the sowing time-20.45kg L of bensulfuron methyl-1And (3) preventing and controlling weeds, draining water until weeds are exposed before spraying, watering for 3-5 cm after spraying for 1-2 days, and preserving water for 5-7 days.
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