A micro-fertilizer application method suitable for oat green production in huang-huai region

Abstract

The application discloses a kind of micro-fertilizer application methods suitable for oat grass green production in Huanghuai region, and relates to the technical field of livestock planting, first select good land, then oat grass seed is soaked with micro-fertilizer and seed dressing fungicide, both provide nutrition for seed growth, and can eliminate viruses on the surface of seed, fundamentally eliminate disease hazards, then spray manganese sulfate, ferrous sulfate, zinc sulfate mixed micro-fertilizer on leaf surface when height is 15 cm, reach the combination of nutrition and health care, guarantee stem green and disease-free spot.In flowering period, spray ammonium molybdate and boric acid mixed micro-fertilizer on leaf surface, prevent disease on fruit, conducive to fruit development, ensure the health of fruit.The application method is simple and easy to operate, efficient and environmentally friendly, and has strong operability, easy to popularize in production, and conducive to oat grass green and high-quality production.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of livestock planting, and particularly relates to a micro-fertilizer application method suitable for oat grass green production in the Huang-Huai region. BACKGROUND

[0002] Grass and forage is the key to the development of animal husbandry, and modern animal husbandry cannot be guaranteed without high-quality grass and forage. So far, oats are recognized as high-yield and high-nutrition quality grasses, and therefore, scientific planting and expansion of the planting range are of great significance to solving the shortage of grass.

[0003] Oats (Avena spp. L.) are high-nutrition annual crops of the genus Avena in the family Poaceae, which are divided into two types of hulled oats (such as common oats, A. sativa) and naked oats (A. nuda), and the main one used as forage and grass is hulled oats. Oat grass is rich in high-soluble carbohydrates (WSC), high-quality digestible fiber, low potassium, low nitrate and multiple minerals and vitamins, and is one of the best roughage varieties for dairy cattle breeding, and is economical, safe, convenient, and palatable.

[0004] The use of oat hay can greatly increase the proportion of roughage in the daily ration of dairy cows, increase the intake of dairy cows and ensure the optimal digestibility of the daily ration, improve the health of the herd, reduce metabolic disorder diseases, prolong the service life of dairy cows, reduce the production cost of fresh milk, and increase milk production. Therefore, in recent years, with the rapid development of the dairy industry, people have paid more and more attention to oat grass planting and utilization. Especially in the aspects of ensuring the sustainable development and ecological safety of the animal husbandry in the farming and grassland areas, oat grass plays an increasingly important role.

[0005] At present, the planting area of oat grass in the United States and Australia is 1.20×10 6 hm 2 and 1.05×10 6 hm 2 , respectively, which is 8 times and 6 times that of 10 years ago, and the developed countries export 1.50×10 6 t of oat hay to foreign countries every year. However, the planting area of oat grass in China is only 4.50×10 5 hm 2 , and in terms of planting area, grass yield, grass product types and quality, there is a big gap compared with foreign products, which cannot meet the needs of the development of beef cattle. The main reason is that the oat grass production in China has problems such as non-standard cultivation technology and low utilization efficiency, which restricts the further improvement of oat yield, quality and economic benefit. Therefore, it is of great significance to study oat high-yield cultivation technology in depth to guide oat production and promote the development of grass husbandry.

[0006] The Huang-Huai-Hai Plain is my country's most important livestock development base. However, due to climate and soil conditions, oat grass production is greatly affected. First, the hot weather leads to more pests and diseases. Second, the soil is deficient in trace elements, especially iron, copper, molybdenum, selenium, and zinc, resulting in uneven soil fertility. This affects the growth and production of oat grass, and also makes the quality and yield of oat grass incomparable to those in its place of origin.

[0007] Therefore, conducting research on high-yield oat grass cultivation techniques in the Huang-Huai-Hai region is of great significance for the commercial production of oat grass in the Huang-Huai region of my country, and plays an important role in the stable development of my country's animal husbandry and the promotion of high-quality oat grass cultivation. Summary of the Invention

[0008] To address the disease problems encountered in oat grass cultivation in the Huang-Huai region, this invention provides a micro-fertilizer application method suitable for green production of oat grass in the Huang-Huai region. Through rational fertilization, the method improves soil physical and chemical conditions, solving the problems of oat grass diseases and yield. Tailored to the climate and soil conditions of the Huang-Huai region, this method enhances seed viability and removes pathogens from the seed surface by treating seeds with micro-fertilizers and pesticides before sowing, eliminating potential disease risks. Then, during the growing season, a mixture of sodium selenite and zinc sulfate is sprayed. During the milk stage of oats, potassium carbonate is sprayed to allow the stems to dehydrate appropriately, reducing rust disease in oats during the flowering and fruiting period, thus achieving the goal of green production of oat grass in the Huang-Huai region.

[0009] The solution adopted by this invention to solve its technical problem is: a micro-fertilizer application method suitable for green production of oat grass in the Huanghuai region, comprising the following steps:

[0010] 1) Site selection, land preparation, and fertilization:

[0011] Choose a plot of land that is open, sunny, flat, and well-ventilated, with medium to high fertility soil to plant oat grass. After land preparation, apply 1.5 tons of well-rotted organic fertilizer per acre to the planting area.

[0012] 2) Seed treatment before sowing:

[0013] Before sowing, place oat grass seeds in a well-ventilated and sunny place to dry for 3-4 hours;

[0014] 3) Seed soaking and seed dressing with micronutrients before sowing:

[0015] Prepare a mixed aqueous solution of 100-200 ppm sodium selenite and 150-250 ppm copper sulfate by mixing 0.05%-0.06% sodium selenite and 0.07-0.08% copper sulfate, respectively. Use this solution to soak the sun-dried seeds. The dosage of sodium selenite and copper sulfate per acre is 0.75-1.80 g and 1.57-3.00 g, respectively. Soak for 1.5-2 hours, then air-dry.

[0016] After the seeds have dried in the shade, treat them with 0.30% carbendazim to prevent disease.

[0017] 4) Application of micronutrient fertilizers during the growing season:

[0018] 1. Foliar spraying of micronutrient fertilizer before jointing: Starting when the plant height is 15cm, spray the leaves with a mixture of manganese, iron and zinc micronutrient fertilizer. The amount sprayed per acre each time is 50 kg. The mixture contains neutral detergent. Spray the mixture once every 15 days, and spray it 2-3 times in a row.

[0019] 2. Apply nitrogen fertilizer by furrowing between rows after jointing: After the oat grass has jointed and the plants have entered the heading stage, apply nitrogen fertilizer by furrowing between rows. Apply 5.0 kg of nitrogen fertilizer per mu. Irrigate in time after fertilization to ensure that the relative soil moisture content is maintained at 65%-70%.

[0020] 3. Foliar spraying of micronutrient fertilizer during the flowering period: When the plants enter the flowering period, spray the leaves with a mixed solution of boron and molybdenum micronutrient fertilizer. The amount of fertilizer sprayed per acre is 50 kg each time. Neutral detergent is added to the mixed solution. Spray once every 15 days, and spray continuously for 2-3 times.

[0021] Furthermore, the soil with medium or higher fertility requires that it be deep, well-structured, and of clay loam, loam, or sandy loam texture, with an organic matter content of 1%.

[0022] Furthermore, when treating seeds, use 0.30% of the seed weight of 50% carbendazim wettable powder.

[0023] Furthermore, the manganese-iron-zinc micro-fertilizer mixture refers to a mixed aqueous solution of manganese sulfate, ferrous sulfate, and zinc sulfate, wherein the main manganese content in manganese sulfate is 32.54%, the main iron content in ferrous sulfate is 20.14%, and the main zinc content in zinc sulfate is 22.74%.

[0024] Furthermore, the dosage of manganese sulfate, ferrous sulfate, and zinc sulfate per acre per application is 20 g, 30 g, and 17.5 g, respectively, with a total dosage of 60 g, 90 g, and 52.5 g for the three applications.

[0025] Furthermore, the nitrogen fertilizer is urea, and the dosage is 5 kg per mu.

[0026] Furthermore, the boron-molybdenum micro-fertilizer mixed aqueous solution refers to a mixed aqueous solution of ammonium molybdate and boric acid, wherein the content of available molybdenum, the main component of ammonium molybdate, is 54.34%, and the content of available boron, the main component of boric acid, is 17.74%.

[0027] Furthermore, the concentrations of ammonium molybdate and boric acid in the boron-molybdenum micro-fertilizer mixed aqueous solution are 40-60 ppm and 50-70 ppm, respectively. The dosages of ammonium molybdate and boric acid per acre per application are 1.7-2.6 g and 2.5-3.5 g, respectively, and the total dosages for two applications are 3.4-5.2 g and 5.0-7.0 g, respectively.

[0028] Compared with the prior art, the beneficial effects of the present invention are:

[0029] This invention provides a micro-fertilizer application method suitable for green production of oat grass in the Huang-Huai region. First, select suitable land. Then, soak oat grass seeds in micro-fertilizer and treat them with a fungicide. This provides nutrients for seed growth and eliminates viruses on the seed surface, fundamentally eliminating potential disease risks. Next, when the plants reach a height of 15 cm, spray the leaves with a mixture of manganese sulfate, ferrous sulfate, and zinc sulfate micro-fertilizer to achieve a combination of nutrition and health maintenance, ensuring green stems and leaves free of disease spots. Finally, during the flowering period, spray the leaves with a mixture of ammonium molybdate and boric acid micro-fertilizer to prevent diseases on the fruit, promote fruit development, and ensure healthy fruit.

[0030] This invention has the following advantages over existing oat production and cultivation methods:

[0031] Traditional seed treatment usually involves seed dressing with pesticides, but the effects of disease prevention and treatment are not ideal. This invention provides triple protection for oat grass. First, the seeds are sun-dried. Then, they are soaked in a mixture of sodium selenite and copper sulfate micronutrient fertilizer, which enhances the resistance of oat grass to various diseases in the early stages of growth. At the same time, the seeds are treated with carbendazim to enhance the preventive effect and improve the stress resistance of oat grass, enabling it to better resist the effects of pests, diseases and adverse environmental conditions.

[0032] Second, during the vegetative growth period, foliar spraying with a mixture of manganese sulfate, ferrous sulfate, and zinc sulfate can prevent diseases and enhance the photosynthetic capacity of leaves through balanced fertilization, which is beneficial to stem and leaf growth and the elimination of pathogens. This step is missing in traditional oat grass production.

[0033] Third, foliar application of a mixture of ammonium molybdate and boric acid micronutrients during the reproductive growth period can physiologically promote the reproductive growth of oats, facilitate the smooth flow of oat resources from source to outlet to storage, and promote the high-quality production of oat fruits.

[0034] IV. This invention significantly increases oat grass yield through seed soaking, seed dressing, and the application of micronutrients during the growing season. The application of micronutrients can specifically supplement the various nutrients required for oat grass growth, contributing to its healthy growth and thus improving its quality.

[0035] Fifth, this invention reduces the use of chemical pesticides and fertilizers, emphasizing green production, thereby significantly reducing environmental pollution. Using micronutrients to replace some chemical fertilizers can reduce soil and water pollution and protect the ecological environment.

[0036] Through experiments, the method of this invention can reduce the disease incidence of oat grass by 50%, increase oat grass yield by 15%, and increase oat grass fruit yield by more than 10%. Furthermore, the nutritional level of the forage grass can be greatly improved, and the soil nutrients are balanced, resulting in a significant increase in soil fertility. This method is simple, easy to implement, highly efficient, environmentally friendly, and easy to operate, making it easy to promote in production and conducive to the green and high-quality production of oat grass. Detailed Implementation

[0037] The present invention will be further described below with reference to embodiments.

[0038] This invention provides a technical solution for micro-fertilizer application method suitable for green production of oat grass in the Huanghuai region. The seed variety is Qinghai oat, the conventional fertilizer is urea, the pesticide is carbendazim, the sowing method is row sowing, the seed amount is 15 kg per mu, the sowing row is 20 cm, the sowing depth is 5 cm, and the seed is compacted after sowing.

[0039] Example 1: This example provides a micro-fertilizer application method suitable for green production of oat grass in the Huanghuai region, including the following steps:

[0040] 1. Site selection, land preparation, and fertilization:

[0041] 1) Select land with good topography and soil with medium to high fertility to plant oat grass; that is, select open, sunny, flat, well-ventilated plots, and select deep, well-structured soil with clay, loam or sandy loam texture and organic matter content of about 1%.

[0042] 2) After land preparation, apply 1.5t of well-rotted organic fertilizer per mu to the planting area, mainly well-rotted cow and sheep manure.

[0043] 2. Seed treatment before sowing:

[0044] Before sowing, place fresh oat grass seeds in a well-ventilated and sunny place to dry for 3-4 hours to enhance seed vigor and sterilization effect.

[0045] 3. Seed soaking and seed dressing with micronutrients before sowing:

[0046] 1) After sun-drying, soak the oat grass seeds in a mixture of 100 ppm selenium fertilizer and 150 ppm sulfur fertilizer. Specifically:

[0047] Prepare a mixture containing 100 ppm sodium selenite and 150 ppm copper sulfate solution. Soak the seeds in the mixture. The amounts of sodium selenite and copper sulfate are 0.05% and 0.07% of the seed weight, respectively. The amounts of sodium selenite and copper sulfate are 0.75 g and 1.57 g, respectively. Soak for 1.5 h and then air dry.

[0048] Sodium selenite (Na2SeO3·5H2O) is a white crystal with a pure selenium content of 62.6%, and it is easily soluble in water and insoluble in ethanol; copper sulfate (CuSO4·5H2O) is a dark blue crystal with a pure copper content of 25.6%, and it is easily soluble in water.

[0049] 2) After the seeds have dried in the shade, treat them with 0.30% of the seed weight of 50% carbendazim wettable powder to prevent diseases.

[0050] 4. Application of micronutrient fertilizers during the growing season:

[0051] 1) Foliar spraying of micronutrient fertilizer before jointing: Before jointing, when the plant height is 15cm, spray the leaves with a mixture of manganese, iron and zinc micronutrient fertilizer. The manganese, iron and zinc micronutrient fertilizer mixture is an aqueous solution of manganese sulfate, ferrous sulfate and zinc sulfate. The concentrations of manganese sulfate, ferrous sulfate and zinc sulfate are 400 ppm, 600 ppm and 350 ppm respectively. The amount used per acre per spray is 50 kg. In order to increase the adhesion of micronutrient fertilizer, add 10g of neutral detergent to the spray solution. Start spraying the mixture when the seedling height is 15cm, and then spray once every 15 days for a total of 3 sprays. In this example, the amount of manganese sulfate, ferrous sulfate and zinc sulfate per acre per spray is 20g, 30g and 17.5g respectively. The total amount used for the 3 sprays is 60g, 90g and 52.5g respectively.

[0052] The aforementioned manganese sulfate (MnSO4·H2O), ferrous sulfate (FeSO4·7H2O), and zinc sulfate (ZnSO4·7H2O) are all chemically pure reagents. Among them, manganese sulfate (MnSO4·7H2O) is a white or pink crystalline powder with a manganese content of 32.54%, soluble in water but insoluble in ethanol; ferrous sulfate (FeSO4·7H2O) is a light blue-green crystalline powder with an iron content of 20.14%, soluble in water; and zinc sulfate (ZnSO4·7H2O) is a colorless or white crystalline powder with a zinc content of 22.74%, soluble in water.

[0053] 2) Apply nitrogen fertilizer by furrowing between rows after jointing: After the oat grass has jointed and the plant has entered the heading stage, apply nitrogen fertilizer by furrowing between rows. Apply 5.0 kg of nitrogen fertilizer per mu (667 square meters). The nitrogen fertilizer mentioned is urea. Irrigate in time after fertilization to ensure that the relative soil moisture content is maintained at about 65%. If it is insufficient, irrigation is required.

[0054] 3) Foliar spraying of micronutrient fertilizer during flowering period: When the plant enters the flowering period, spray the leaves with a mixed aqueous solution of boron-molybdenum micronutrient fertilizer, wherein the mixed aqueous solution of boron-molybdenum micronutrient fertilizer is ammonium molybdate ((NH4)6Mo7O 24 . A mixed aqueous solution of ammonium molybdate (H₂O) and boric acid (H₃BO₃) with concentrations of 40 ppm and 50 ppm, respectively, is used. The dosage per acre per spray is 50 kg. In this example, the dosages of ammonium molybdate and boric acid are 1.7 g and 2.5 g, respectively. To increase the adhesion of the micronutrient fertilizer, neutral detergent can also be added to the spray solution. After spraying the mixed solution once every 7 days, spray the leaves again. Repeat the spraying process twice.

[0055] The above-mentioned ammonium molybdate ((NH4)6Mo7O) 24 . Both ammonium molybdate (NH4)6Mo7O and boric acid (H3BO3) are chemical reagents. 24 . Molybdenum 4H2O is a white or pale green crystalline powder, with an effective molybdenum content of 54.34% and is soluble in water, acids, alkalis and ethylene glycol; Boric acid (H3BO3) is a white crystalline powder or transparent crystal, with an effective boron content of 17.74% and is soluble in water and ethanol.

[0056] The micro-fertilizer application method provided by this invention, suitable for green production of oat grass in the Huanghuai region, is simple, easy to implement, highly efficient and environmentally friendly, easy to operate, and easy to promote in production, which is conducive to the green and high-quality production of oat grass.

[0057] Example 2: This example provides a micro-fertilizer application method suitable for green production of oat grass in the Huanghuai region. Before sowing, when soaking and coating seeds with micro-fertilizer, a solution of 150 ppm sodium selenite and 200 ppm copper sulfate is prepared. The seeds are then soaked in this solution. The amounts of sodium selenite and copper sulfate are 0.06% and 0.07% of the seed weight, respectively, and the amounts of sodium selenite and copper sulfate are 1.35 g and 2.10 g, respectively. The soaking time is 1.5 h.

[0058] When the plants enter the flowering stage, spray the leaves with a 50 ppm solution of ammonium molybdate and boric acid, with concentrations of 50 ppm and 60 ppm respectively. The amount used per acre per spray is 50 kg, with 2.2 g of ammonium molybdate and 3.0 g of boric acid. After 7 days, spray the leaves again, and repeat the spraying twice. Other conditions are the same as in Example 1.

[0059] Example 3: This example provides a micro-fertilizer application method suitable for green production of oat grass in the Huanghuai region. Before sowing, when soaking and mixing seeds with micro-fertilizer, a solution of 200 ppm sodium selenite and 250 ppm copper sulfate is prepared. The seeds are then soaked in the solution. The amounts of sodium selenite and copper sulfate are 0.06% and 0.08% of the seed weight, respectively. The amounts of sodium selenite and copper sulfate are 1.80 g and 3.00 g, respectively. The soaking time is 1.5 h.

[0060] When the plants enter the flowering stage, spray the leaves with a 50 ppm solution of ammonium molybdate and boric acid, with concentrations of 60 ppm and 70 ppm respectively. The amount used per acre per spray is 50 kg, with 2.6 g of ammonium molybdate and 3.5 g of boric acid. After 7 days, spray the leaves again, and repeat the spraying twice. Other conditions are the same as in Example 1.

[0061] Comparative Example 1: This comparative example provides two traditional methods for applying nitrogen fertilizer to oat grass, including:

[0062] 1) Traditional planting method I (seed dressing method) - seed dressing with medicine + topdressing with nitrogen fertilizer during the growing season; that is, before sowing, the seeds are treated with carbendazim at a dosage of 3% of the seed dosage. During the heading and flowering period, topdressing with nitrogen fertilizer is applied at a dosage of 10 kg of urea per mu.

[0063] 2) Traditional planting method II (direct sowing method) - apply nitrogen fertilizer directly during the growing season; that is, the seeds are not treated before sowing, and nitrogen fertilizer is applied during the heading and flowering period, with the amount of nitrogen fertilizer being 10 kg of urea per mu.

[0064] The nutritional components of oat grass during the heading and flowering stage were determined under the implementation schemes of Examples 1-3 and the comparative example, and the results are shown in Table 1 below:

[0065]

[0066] As shown in the table above, regarding crude protein content, the average content of the two control groups was 7.07%, while the average content of the three implementation groups was 7.43%. This indicates that the crude protein content of the oat grass in Examples 1-3 was higher than that of oat grass grown using traditional planting methods I and II. Regarding neutral detergent fiber content, the average content of the two control groups was 58.9%, while the average content of the three implementation groups was 56.43%. This indicates that the neutral detergent fiber content of the oat grass in Examples 1-3 was lower than that of oat grass grown using traditional planting methods I and II. Similarly, the acid detergent fiber content of the oat grass in Examples 1-3 was also significantly lower than that of the two control groups. Therefore, the micro-fertilizer application method for green production of oat grass in the Huang-Huai region provided by the embodiments of this invention is beneficial for improving the quality of oat grass.

[0067] Experimental Example: This experimental example is a single-factor randomized design, used in a field trial to verify the method of the present invention and the disease susceptibility and forage yield of flowering oat grass grown according to two traditional planting methods in the comparative example. Specifically:

[0068] Five treatments were set up: Y-1, Y-2, Y-3, Y-4 and Y-0. Y-2, Y-3 and Y-4 were performed using the methods of Examples 1-3 of this invention, respectively. Y-0 and Y-1 were performed using traditional planting method I and traditional planting method II, respectively. Each treatment was repeated 4 times. After 2 years of research, the results are shown in the table below.

[0069] As shown in Table 2 below, the susceptibility rates of the main diseases of oat grass during the flowering period (including rust, smut, and root rot) were significantly lower than those of the two controls. The susceptibility rates of Y-1, Y-2, and Y-3 were 23.76%, 28.14%, and 50.06% lower than those of Y-0, respectively, and the susceptibility rates of Y-1, Y-2, and Y-3 were 45.91%, 49.02%, and 50.06% lower than those of Y-1, respectively.

[0070] In contrast, the average forage yield during the flowering period in Examples 1-3 was 1.17 DM kg / m² over two years. 2 1.18 DMkg / m 2 and 1.22 DM kg / m 2 Compared with Y-0, the values ​​increased by 34.78%, 35.62%, and 40.23% respectively, with an average increase of 36.88%; compared with Y-1, the values ​​increased by 24.47%, 25.53%, and 29.79% respectively, with an average increase of 26.60%. The results are shown in Table 3.

[0071] Experiments have shown that the micro-fertilizer application method for green oat grass production provided by this invention, compared with traditional fertilization methods, can not only significantly reduce the disease susceptibility of oat grass, but also significantly increase forage yield, and the implementation effect is remarkable.

[0072]

[0073]

[0074] The above description is only a preferred embodiment of the present invention and does not limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A method for applying micronutrient fertilizers suitable for green production of oat grass in the Huang-Huai region, characterized in that: Includes the following steps: 1) Site selection, land preparation, and fertilization: Choose an open, sunny, flat, and well-ventilated plot of land with medium to high fertility to plant oat grass. After land preparation, apply 1.5 tons of well-rotted organic fertilizer per acre to the planting area; the organic fertilizer should mainly consist of well-rotted cow and sheep manure. 2) Seed treatment before sowing: Before sowing, place oat grass seeds in a well-ventilated and sunny place to dry for 3-4 hours; 3) Seed soaking and seed dressing with micronutrients before sowing: Prepare a mixed aqueous solution of 100-200 ppm sodium selenite and 150-250 ppm copper sulfate by mixing sodium selenite (0.05%-0.06% of the seed weight) and copper sulfate (0.07-0.08% of the seed weight) to treat the sun-dried seeds by soaking them. The dosage of sodium selenite and copper sulfate per acre is 0.75-1.80 g and 1.57-3.00 g, respectively, and the soaking time is 1.5-2 hours. Then, air-dry them. After the seeds have dried in the shade, treat them with 0.30% carbendazim to prevent disease. 4) Application of micronutrient fertilizers during the growing season:

1. Foliar spraying of micronutrient fertilizer before jointing: Starting when the plant height reaches 15cm, spray the leaves with a mixture of manganese, iron, and zinc micronutrient fertilizers. The amount sprayed per acre is 50kg each time. The mixture contains neutral detergent. Spray the mixture once every 15 days, for 2-3 consecutive times. The manganese, iron, and zinc micronutrient fertilizer mixture refers to a mixed aqueous solution of manganese sulfate, ferrous sulfate, and zinc sulfate. The main manganese content in manganese sulfate is 32.54%, the main iron content in ferrous sulfate is 20.14%, and the main zinc content in zinc sulfate is 22.74%. The dosage of manganese sulfate, ferrous sulfate, and zinc sulfate per acre per application is 20g, 30g, and 17.5g, respectively. The total dosage for the three applications is 60g, 90g, and 52.5g, respectively.

2. Apply nitrogen fertilizer by furrowing between rows after jointing: After the oat grass has jointed and the plants have entered the heading stage, apply nitrogen fertilizer by furrowing between rows. Apply 5.0 kg of nitrogen fertilizer per mu. Irrigate in time after fertilization to ensure that the relative soil moisture content is maintained at 65%-70%.

3. Foliar spraying of micronutrient fertilizer during the flowering period: When the plants enter the flowering period, spray the leaves with a mixed aqueous solution of boron-molybdenum micronutrient fertilizer. The amount sprayed per acre is 50 kg each time. The mixed aqueous solution contains neutral detergent. Spray once every 15 days, and continue spraying for 2-3 times. The mixed aqueous solution of boron-molybdenum micronutrient fertilizer refers to a mixed aqueous solution of ammonium molybdate and boric acid. The concentration of ammonium molybdate and boric acid in the mixed aqueous solution is 40-60 ppm and 50-70 ppm, respectively. The main component of ammonium molybdate, effective molybdenum, has a content of 54.34%, and the main component of boric acid, effective boron, has a content of 17.74%. The dosage of ammonium molybdate and boric acid per acre per application is 1.7-2.6 g and 2.5-3.5 g, respectively. The total dosage for two applications is 3.4-5.2 g and 5.0-7.0 g, respectively.

2. The micro-fertilizer application method suitable for green production of oat grass in the Huanghuai region according to claim 1, characterized in that: The soil with medium or higher fertility is required to be: deep soil layer, good structure, texture of clay loam, loam or sandy loam, and organic matter content of 1%.

3. The micro-fertilizer application method suitable for green production of oat grass in the Huanghuai region according to claim 1, characterized in that: When treating seeds, use 0.30% of the seed weight of 50% carbendazim wettable powder.

4. The micro-fertilizer application method suitable for green production of oat grass in the Huanghuai region according to claim 1, characterized in that: The nitrogen fertilizer mentioned is urea, with a dosage of 5 kg per mu.

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