CN114568230A - Large-scale high-yield planting method for millet in medium-low saline-alkali soil - Google Patents

Abstract

The invention provides a large-scale high-yield planting method for millet in medium-low saline-alkali soil, which improves soil by adopting methods of multiple plowing, additional application of organic fertilizer and the like. The seeds are rinsed with saline water to increase the germination vigor and germination rate of the seeds. The seed dressing agent is used for dressing seeds, so that the disease and insect resistance and the germination rate of the seeds are improved. In the growth period of the millet, the plant growth regulator is uniformly sprayed on the leaf surfaces, so that the plant height is effectively reduced, the stem thickness is increased, the lodging resistance of the millet under the condition of high density is improved, and the higher yield is finally obtained. The phosphate fertilizer is sprayed on the leaf surface to promote the blossoming and fructification and the grain filling, and improve the quality and the yield of the millet. The method disclosed by the invention has the advantages that thinning is avoided, intertillage weeding is combined chemically, mechanical spraying is carried out, and harvesting is carried out, so that the large-scale production of the millet in the saline-alkali soil is realized, the labor cost is saved, and the planting benefit is improved.

Description

Large-scale high-yield planting method for millet in medium-low saline-alkali soil

Technical Field

The invention relates to a method for planting millet in medium-low saline-alkali soil with large-scale high yield, and belongs to the technical field of crop planting.

Background

At present, soil salinization is gradually becoming a main factor limiting the development of agriculture in the global scope, and the area of the global saline-alkali land is about 9.55 multiplied by 10⁷hm²It is mainly distributed in northwest, northeast, north China and coastal areas. Nearly 800 million mu of unused saline-alkali soil and over 1100 million mu of medium-low yield field exist in the yellow river delta, and are main reserve land resources for agricultural production. Because of the restriction of soil saline-alkaline deficiency, lack of fresh water resources, drought, a plurality of low-lying lands and other factors, the production potential of various crops is not effectively exerted, the productivity level is low, and the method becomes an important factor for hindering the sustainable development of agriculture. Millet is the main component crop of traditional coarse cereals, and the local famous products of Shandong millet are numerous and are one of the important millet production areas in China. The millet has drought resistance, barren resistance, high utilization efficiency of water and fertilizer, better tolerance to saline and alkaline, and better growth in the soil below 0.3% saline and alkaline. Millet is rich in nutrition and high in benefit, and the straw and the rice bran are also high-quality feed for big livestock. The millet planting greatly reduces the use of chemical fertilizers and pesticides, is beneficial to green and environmental protection in the development of millet production in yellow river delta, and promotes circular agriculture. The yellow river delta has a wide saline-alkali soil, the saline-alkali degree is different, the seasonal change is obvious, the millet seedling emergence is slow, the seedling protection is difficult, the labor input is large, the cost is high, and the large-area and large-scale production of the millet is difficult to realize. The millet has better saline-alkali tolerance and is a typical environment-friendly crop. However, the current cultivation mode of millet in saline-alkali soil still has the phenomena of difficult seedling emergence and seedling establishment, serious weed damage, lodging and the like, and the economic benefit of millet cannot reach a higher level. Therefore, the technology for exploring the difficult point of millet plantingThe establishment of a large-scale high-yield and high-efficiency cultivation technology for millet in saline-alkali soil is a technical problem which needs to be solved urgently.

Disclosure of Invention

Aiming at the problems in the prior art, the invention provides a large-scale high-yield planting method for millet in medium and low saline-alkali soil.

The technical scheme adopted by the invention for realizing the purpose is as follows:

the invention provides a large-scale high-yield planting method for millet in medium-low saline-alkali soil, which comprises the following steps of:

(1) selecting land, preparing land and fertilizing: selecting land blocks with flat topography and no waterlogging, cutting previous crop straws by a straw returning machine after previous crop is harvested, carrying out rotary tillage before planting, applying organic fertilizer and nitrogen-phosphorus-potassium compound fertilizer in the process of plowing, and then flattening the land to ensure that the land is free of bumpiness and stubbless;

(2) seed treatment and sowing: selecting a proper local saline-alkali-resistant excellent millet variety, selecting the millet variety by adopting saline water before sowing, and sowing after medicament treatment;

(3) sowing: sowing in time after wheat harvesting in summer, and ensuring proper soil moisture content without thinning;

(4) managing the field;

(5) harvesting: when the back shell of the seed appears grey white, namely ash hanging, the seed is harvested in time when the seed becomes hard, and the harvesting, threshing and wheat stubble are completed by adopting a proper combine harvester once.

Further, in the step (1), the salt content of the land parcel is not more than 0.3%; the rotary tillage depth is not less than 8 cm.

In the soil preparation process, the application amount of the used organic fertilizer is 1000kg-2000kg/666.7m²(ii) a The application amount of the nitrogen-phosphorus-potassium (15-15-15) compound fertilizer is 30 kg/666.7m²。

Further, in the step (2), the mass concentration of the saline water is 10%; the medicament is a special seed dressing agent for millet with the seed amount of 0.1 percent.

The seed dressing agent special for the millet is 25% pyraclostrobin 1g, 35% metalaxyl-M1 g, 37.5% thiodicarb 2g, 12.5% imidacloprid 2g, 6% tebuconazole 1g and water 5g or 40% phoxim 2g, 35% metalaxyl-M1 g, 6% tebuconazole 1g and water 5 g.

Further, in the step (3), the row spacing of the sowing is 40-50 cm; the seeding rate of the seeding is 0.5kg/666.7m²-0.6kg/666.7m²The sowing depth is 2-3 cm; the sowing mode is precision drilling, film covering hole sowing or bare land hole sowing.

Further, in step (4), the field management comprises:

and (3) weed control: 44% monosulfuron is adopted before seedling emergence after sowing, and the grain size is 120g/666.7m²Spraying 80-100mL of the anti-daphnyn after seedling cultivation, wherein the optimal use period is a 4-5 leaf period of the rice seedling; fertilizing, namely adding nitrogen fertilizer in the jointing stage of the millet; before blooming and in the filling period, spraying a phosphate fertilizer and a trace element fertilizer on the leaf surface; after water management and seeding, adopting drop irrigation or spray irrigation to sprout if meeting drought; irrigating in drought and draining in waterlogging in booting stage and grouting stage; carrying out shallow intertillage in the intertillage-6-7 leaf period, wherein the cultivation depth is 2-3 cm; deep intertillage is carried out for 1 time before ridge sealing, and the tilling depth is 5-8 cm; chemical control is carried out in 8-10 leaf stage and heading stage of millet respectively; pest control-the agent for controlling soil insects and base fertilizer are used in soil preparation, and physical, biological or chemical control is adopted to control pests in time after emergence of seedlings; hanging the bird repellent and the colored ribbon in the grouting period.

In the field management process of the invention, the nitrogen fertilizer is liquid nitrogen fertilizer or urea, and the application amount of the liquid nitrogen fertilizer is 3-5kg/666.7m²The dosage of urea is 10-15 kg/666.7m²(ii) a The phosphate fertilizer is 0.2 percent of monopotassium phosphate aqueous solution.

The combine harvester used by the invention is a Ninggang grain combine harvester.

The invention relates to a large-scale high-yield and high-efficiency cultivation technology for millet in saline-alkali soil, which improves the soil by adopting methods of multiple plowing, increasing the application of organic fertilizer and the like. Selecting a new variety of salt and alkali resistant millet, selecting seeds by using saline water, and dressing seeds by using a seed dressing agent to improve the germination rate and disease resistance of the millet and cultivate strong full seedlings. During the growth period of the millet, the chemical control agent is sprayed for 2 times to control the high and strong stems and improve the lodging resistance. And in the jointing stage and the booting stage, nitrogen fertilizer is applied and phosphate fertilizer is sprayed to the leaf surface respectively to promote plant growth, flowering and fructification and grain filling. The technology adopts whole-process mechanization, namely mechanical seeding, fertilization, weeding, intertillage, pesticide spraying and harvesting, realizes large-area large-scale production of the millet and obtains higher economic benefit.

The invention has the following advantages:

the method for the large-scale high-yield cultivation of the millet in the saline-alkali soil effectively breaks through the obstacles existing in the millet planting and the difficulty of the cultivation and planting of the millet in the saline-alkali soil, enlarges the planting range of the millet, improves the yield and the quality of the millet, improves the utilization rate of the medium-low saline-alkali soil, fully develops the saline-alkali soil resources, obtains higher economic benefits, lays a solid foundation for the large-scale planting of the millet in the saline-alkali soil of the yellow river delta and promotes the sustainable development of the agriculture in China.

Detailed Description

The present invention will be further illustrated with reference to the following examples, but the present invention is not limited to the following examples.

Example 1 millet seed treatment

1. Millet seed treatment

Selecting the screened and aired seeds, rinsing the seeds with saline water, and then dressing the seeds with a seed dressing agent, wherein the specific operation is as follows:

preparing 10% saline solution (mass ratio), pouring the seeds into a container to be rapidly stirred after all the salt is dissolved, fishing out the blighted grains floating on the seeds, and finally fishing out the full grains sinking at the bottom. Washed with clear water for 3-5 times and dried in the sun.

2. Seed dressing agent seed dressing and germination test

(1) Test materials: the tested millet variety Jigu 22

The test seed clothing agent: 25% pyraclostrobin, 35% metalaxyl-M, 37.5% thiodicarb, 12.5% imidacloprid and 6% tebuconazole.

(2) Formula of seed dressing agent for rice seeds

Different seed dressing agent schemes are designed according to the common disease occurrence condition of the millet, the mixed seed dressing agent is uniformly mixed with 1kg of grains, and then the grains are tightly planted for 4 hours and dried in a dark place. The effect of the different seed dressings was evaluated with uncoated seeds as a control.

TABLE 1 different seed dressing schedules

(3) Influence of seed dressing agent on millet germination

Placing the seeds in a 9cm culture dish paved with three layers of wet filter paper, adding 5mL of purified water, 100 seeds in each dish, and repeating for 3 times; culturing in 25 deg.C climate box with illumination of 16 h/d. The number of seeds germinated (radicles and germs longer than 1mm are recorded as germination) was recorded every other day from the 2 nd day of the start of the test, and the germination index and germination rate of the differently treated cereals were calculated by the 8 th day.

Germination rate = number of germinated seeds/total number of test seeds × 100%

Index of germinationPI=1.00×nd2+0.75×nd4+0.50×nd6+0.25×nd8

PI--seed germination index; nd2, nd4, nd6 and nd8 are the seed germination rates of the 2d, 4d, 6d and 8d respectively.

Simultaneously, sowing seeds of different treatments in the field, planting 200 seeds in each treatment, planting the seeds with the row length of 2 m, repeating the steps for 3 times, and investigating the emergence rate and the emergence time after emergence

The emergence rate = the number of seeds emerging/total number of test seeds × 100%

Data analysis was performed using SPSS software and analysis of variance using Duncan test.

3. Results and analysis

The germination and emergence results for the various treatments are shown in table 1: in the petri dish method, the germination rates of the treatments were significantly different. But at the germination potential, the control was lower than the treatment and there was a significant but not significant difference between the different dressing agents; in the field test, the emergence rates of treatments 1, 2 and 4 were significantly higher than those of treatments 3 and the control, with the emergence rate of treatment 1 being the highest. At the time of emergence, treatment 2 was the earliest and significantly different from the control.

TABLE 2 Effect of different treatments with seed dressing on the germination of millet seeds

Note: different letter representations after the same column of data in the tableP<The difference was significant at 0.05.

From the data in table 1, it can be seen that: treatments 2 and 4 significantly increased the germination vigour, rate of emergence and time of emergence of the seeds compared to the control.

Example 2 millet sowing mode

Seeding tests in different modes are carried out on Guanghong county of Guanghong county in eastern Shandong province in 2019 in 5 months, and test plots are about 6000m²The fertility is medium, the salt content of sandy loam and soil with the surface layer of 20cm is 2.32 g/kg. The test was carried out as follows:

ditches are dug on the two sides of the test field for salt removal, and ploughing is carried out in autumn, so that the surface soil is deeply loosened, and the permeability of the soil is improved. Tilling at depth of 20cm before planting, watering thoroughly, and spreading at a speed of 1000 kg/666.7m after 7 days²The application amount of the organic fertilizer and the nitrogen-phosphorus-potassium (15-15-15) compound fertilizer is 30 kg/666.7m²Then, carrying out secondary plowing with the plowing depth of 10 cm; and then leveling the land to make the land uniform and fine. The test is that the seeds are sown after 5 months and 15 months, the seeds are sprayed to the paddy field after sowing, and the fenpropyn and 20 percent fluroxypyr-meptyl are sprayed in the 4-5 leaf period after seedling emergence for preventing and controlling monocotyledonous and dicotyledonous weeds. Harvesting in 9 months and 20 days, and managing the rest in the same field. Sowing is carried out according to the following different sowing modes:

(1) precision drill

(2) Film-covered hole sowing

(3) Bare land hole sowing

The number of days of seedling emergence is investigated after sowing, and the population density is investigated about 6 leaf stages after seedling emergence. Each treatment takes 3 representative places, each place is 2 lines per 2 meters, the number of seedlings is investigated, and the average density is calculated; yield and yield traits: and 3 representative plots are taken for each treatment during maturation, and the yield of grains is determined in a region with the row length of 5 meters and 6 rows.

TABLE 3 influence of different sowing modes on related traits of millet

Note: different letter representations after the same column of data in the tableP<The difference was significant at 0.05.

The experimental result shows that the seedling emergence time of the 3 sowing modes is 4-5.5 days, the seedling emergence speed of the millet is the fastest under the film-covered hole sowing condition, and the difference with other sowing modes is not obvious. The difference of the emergence rates in the 3 sowing modes is obvious, the highest emergence rate is the mulching film hole sowing, and the emergence rate of the bare land hole sowing is the lowest. The final heading rates of different sowing modes are different, the precision drilling is highest, the early stage emergence rate of the film-covered hole sowing mode is high, the growth vigor is good, but the root system of the millet cannot be pricked down in the grouting period, the lodging is serious, and the yield is low. The other two seeding modes have higher yield and are precision drilling 301.12 kg/666.7m² 。

Example 3 millet harvester type

The test site is in a demonstration base for producing Guanghong plum magpie township millet in Dongyun Shandong in 2019 for 10 months. The test is a single factor test of different machine types, and the reference machines are Ninglian 4LZ series self-propelled grain combine harvester, a middle-machine southern 'Bilang' brand 4LZ-4.0S full-feeding combine harvester and a John Diel W80 type combine harvester 3 harvester.

The specific parameters of the model 3 are shown in the table 4, and are all self-propelled. Through the tests on the loss rate, the cleaning rate and the operating efficiency of the 3 types of harvesters, the use economy, the reliability and the adaptability are examined.

TABLE 4 main technical parameters of the test machine type

And (3) selecting a tested millet variety to gather millet 22, planting the row spacing of 50cm, keeping the seedling density of 4 ten thousand plants per mu, harvesting the millet with the height of 116cm and the water content of 15.5 percent.

The loss rate, impurity rate and operation efficiency of the 3 harvesters are shown in a table 5, and the loss rate of John Diel W80 is 15.3 percent and the impurity rate is 13.2 percent; the loss rates of the Bilang 4LZ-4.0S harvester and the Ninggang grain combine harvester are close to 6.3 percent and 5.5 percent respectively. The two models have lower loss rate and impurity rate and convenient steering, and are suitable for small plots in mountainous areas, hills and the like.

TABLE 5 loss rate, impurity content rate and operating efficiency of the test machine type harvest

According to the requirements of harvested millet on the main parameters of rotation speed of harvester drum and gap size, the indexes of harvest loss rate and cleanliness of 3 harvesters of different models are compared, so that a special combine harvester (Shandongning union) for millet or a green wave 4LZ-4.0S harvester suitable for harvesting millet is screened out, and the procedures of harvesting, threshing, stubble cleaning and the like are completed at one time.

Example 4 millet planting

In 2021, 6-10 months, a planting test was carried out on Guanghong plum magpie town in Dongying City of Shandong province, a demonstration variety was Jigu 22, a demonstration area was 100 mu, the fertility was moderate, sandy loam and 20cm surface soil had a salt content of 1.53g/kg, and the soil was of a mild saline-alkali type, and the previous crop was wheat.

Millet cultivation management is carried out according to the following method:

(1) land preparation: and (3) timely cleaning stubble after the wheat is harvested in 2021 years, controlling the height of the wheat stubble within 15cm, cutting the straws into pieces with the length not more than 25 cm, and uniformly scattering and covering the wheat straws. Ploughing before sowing, wherein the ploughing depth is 10 cm; 2000 kg/mu of farmyard manure and 30 kg/mu of N-P-K ternary compound fertilizer are added in the ploughing process, and then the land is leveled to be even and fine.

(2) Seed treatment and sowing: treating seeds with 10% saline solution (mass ratio), pouring the seeds into a container to be rapidly stirred after the salt is completely dissolved, fishing out blighted grains floating on the seeds, and fishing out full grains sinking at the bottom. Washed with clear water for 3-5 times and dried in the sun. The seeds after sun drying are mixed by using a seed-mixing agent, and the components of the seed-mixing agent are as follows: 25% pyraclostrobin 1.5g, 35% metalaxyl-M1.5 g, 37.5% thiodicarb 3g, 12.5% imidacloprid, 6% tebuconazole 1g and water 5g, uniformly mixing the seed dressing agent and 1kg of millet seeds, closing the seeds for 4 hours, and airing in a cool place.

(3) Sowing: sowing seeds in rows at 40 cm distance and 0.5kg/666.7m by using a precise millet sowing machine in 23 days after 6 months²The sowing depth is 2-3cm, and no thinning is carried out; after sowing, 44% monosulfuron-methyl (Guyou) 100g/666.7m is adopted²And sealing.

(4) Field management:

applying liquid nitrogen fertilizer by unmanned aerial vehicle in the stage of fertilization and millet jointing, wherein the using amount is 5kg/666.7m²Before blooming and in the filling period, 0.2% potassium dihydrogen phosphate water solution is sprayed on the leaf surface.

Water content management: drip irrigation or spray irrigation is adopted until emergence of seedlings in case of drought after sowing, and soil hardening is prevented. Irrigation is carried out in drought and drainage is carried out in waterlogging in the booting period and the grouting period.

Weeding: spraying 100mL of nafamol (sethoxydim) in the 4-5 leaf stage of the grain seedling to remove monocotyledonous weeds; 60mL of 20% fluroxypyr-meptyl ester can remove dicotyledonous weeds.

Cultivating: shallow intertillage is carried out in the 6-7 leaf period, the cultivation depth is 2-3cm, and weeds among ridges are removed; deep intertillage is carried out for 1 time before ridge sealing, the tillage depth is 5-8 cm, and secondary weeding, impurity removing and deep intertillage are carried out. Combining root ridging, the height of the ridging is 7-10cm, the deep pricking of new roots is promoted, and the lodging resistance is improved.

And (3) pest control: the corn borer is prevented and treated by adopting 1000 times of liquid of 10 percent of alpha-acarid nitrile from the stem-drawing stage to the booting stage; 4.5 percent of high-efficiency cypermethrin emulsifiable 1000 times liquid is sprayed to prevent armyworm in the booting stage; when the blast disease spots are initiated, the blast disease spots are sprayed with 800 times of 40% kewensan emulsifiable solution for 1 time every 5 to 7 days and 3 times continuously. During the growth period, if white-spot disease and black-ear disease occur, the diseased plants should be removed as soon as possible for centralized treatment to control the further expansion.

The bird repellent is hung on the grain ears in the filling stage, 60 bags are used per mu, and the sparrows are prevented from eating the grains.

Chemical control: spraying 60mL of a special growth control agent 'Kangfengli' (mixed with 15kg of water) for the millet to uniformly spray the millet seedlings at the jointing stage (8-10 leaves) and the heading stage per mu, so that the plant height is shortened, the stalks are thickened, and the lodging of the millet under high density is prevented;

(5) harvesting: at the end of the wax ripening period or at the beginning of the complete ripening period, the seeds have a water content of about 20% and 95% of the grains are hardened. The Ninglian grain combine harvester is adopted for harvesting, so that the production efficiency can be greatly improved.

The conventional planting is that seeds are not mixed with seeds and chemical control agent is not sprayed, and the other operations are the same.

Investigating the emergence rate of the grain seedlings at a 6-leaf stage, randomly selecting 5 rows to observe and counting the lodging condition at a grouting stage; in the later stage of grouting, measuring production and continuously taking 3 rows at each production measuring point, wherein each point takes a sample of 3.6 m²Investigating the number of ears of a sample point, weighing the weight of ears in a cell after harvesting, weighing the weight of fresh grains after threshing, measuring the water content of the grains by adopting a grain water content rapid-measuring instrument, and calculating the yield according to the national standard water content of 13.5%. Calculating the formula: measuring yield (kilogram/mu) = mu fresh grain weight x [ (1-measured moisture content) ÷ (1-13.5%)]. After harvesting, the seeds are separately harvested and tested in different districts. Data analysis was performed using SPSS software and analysis of variance using the Duncan test, with results as shown in table 6.

TABLE 6 agronomic traits related to different treatments of millet

Note: different letter representations after the same column of data in the tableP<The difference was significant at 0.05.

According to the data in table 6, the seed dressing agent can be used for dressing seeds, so that the emergence rate of the millet can be obviously improved, the sufficient population density of the millet can be ensured, and a foundation is laid for the later-stage high yield creation. Spraying the chemical control agent at the jointing stage and the early stage of booting can effectively reduce the plant height of the millet, increase the stalk strength, enhance the lodging resistance and obviously improve the yield; the scheme of the invention adopts whole-process mechanization, saves labor cost and obviously improves millet benefit. According to the test result in 2021, compared with the conventional planting, the yield of the scheme disclosed by the invention is increased by 15.56%, the difference is obvious, and the cost is saved and the efficiency is increased by 334.5 yuan per mu.

Claims (8)

1. A large-scale high-yield planting method for millet in medium-low saline-alkali soil is characterized by comprising the following steps:

(1) selecting land, preparing land and fertilizing: selecting land blocks with flat terrain and no waterlogging, chopping previous crop straws by a straw returning machine after previous crop is harvested, carrying out rotary tillage before planting, applying organic fertilizer and nitrogen-phosphorus-potassium compound fertilizer in the process of tillage, and then leveling the land to ensure that the land is bumpy and has no root stubble;

(2) seed treatment and sowing: selecting a proper local saline-alkali-resistant excellent millet variety, selecting the millet variety by adopting saline water before sowing, and sowing after medicament treatment;

(3) sowing: sowing in time after wheat harvesting in summer, and ensuring proper soil moisture content without thinning;

(4) managing the field;

(5) harvesting: when the back shell of the seed appears grey white, namely ash hanging, the seed is harvested in time when the seed becomes hard, and the harvesting, threshing and wheat stubble are completed by adopting a proper combine harvester once.

2. The planting method of claim 1, wherein in step (1), the plots have a salt content of no more than 0.3%; the rotary tillage depth is not less than 8 cm.

3. Planting method as claimed in claim 1 or 2, wherein the organic fertilizer is applied in an amount of 1000kg-2000kg/666.7m²(ii) a The application amount of the nitrogen-phosphorus-potassium (15-15-15) compound fertilizer is 30 kg/666.7m²。

4. The planting method of claim 1, wherein in step (2), the saline water has a mass concentration of 10%; the medicament is a special seed dressing agent for millet with the seed amount of 0.1 percent.

5. The planting method according to claim 4, wherein the special seed dressing agent for foxtail millet is 25% pyraclostrobin 1g +35% metalaxyl-M1 g +37.5% thiodicarb 2g +12.5% imidacloprid 2g +6% tebuconazole 1g + water 5g or 40% phoxim 2g +35% metalaxyl-M1 g +6% tebuconazole 1g + water 5 g.

6. The planting method according to claim 1, wherein in the step (3), the row spacing of the sowing is 40-50 cm; the seeding rate of the seeding is 0.5kg/666.7m²-0.6kg/666.7m²The sowing depth is 2-3 cm; the sowing mode is precision drilling, film covering hole sowing or bare land hole sowing.

7. The planting method of claim 1, wherein in step (4), the field management comprises:

and (3) weed control: after sowing, 44 percent monosulfuron is adopted before seedling emergence, and 100-one sodium sulfovinate 120g/666.7m²Spraying 80-100mL of the anti-daphnyn after seedling cultivation, wherein the optimal use period is a 4-5 leaf period of the rice seedling; fertilizing, namely adding nitrogen fertilizer in the jointing stage of the millet; before blooming and in the filling period, spraying a phosphate fertilizer and a trace element fertilizer on the leaf surface; after water management and sowing, adopting drop irrigation or spray irrigation to sprout in case of drought; irrigating in drought and draining in waterlogging in booting stage and grouting stage; carrying out shallow intertillage in the intertillage-6-7 leaf period, wherein the cultivation depth is 2-3 cm; deep intertillage is carried out for 1 time before ridge sealing, and the tilling depth is 5-8 cm; chemical control is carried out in 8-10 leaf stage and heading stage of millet respectively; pest control-the agent for controlling soil insects and base fertilizer are used in soil preparation, and physical, biological or chemical control is adopted to control pests in time after emergence of seedlings; hanging the bird repellent and the colored ribbon in the grouting period.

8. The method for growing as claimed in claim 7, wherein the nitrogen fertilizer is liquid nitrogen fertilizer or urea, and the liquid nitrogen fertilizer is applied in an amount of 3-5kg/666.7m²The dosage of urea is 10-15 kg/666.7m²(ii) a The phosphate fertilizer is 0.2 percent of monopotassium phosphate aqueous solution.