First, the scientific selection of species, specifications sowing according to the local planting conditions and fertility levels to select the appropriate species, such as Zhengdan 958, Dandan 20, Dandan 9 and so on, the best choice for the purchase of the coating system for the seeds. The amount of machine sowed per mu is 2.5-3 kg, and the row spacing is generally 60 cm. Whether it is hard or direct seeding, it is best to apply P and K fertilizers at the time of sowing.
Second, scientific fertilization According to the law of maize demand, soil fertility, fertility characteristics, and the target yield of scientific soil testing and fertilizer. Generally, the average yield per mu is about 500 kg, which means 12 kg of pure nitrogen, 6 kg of phosphorous, 4 kg of potassium, 13 kg of diammonium, 21 kg of urea, and 8 kg of potassium sulfate.
The average yield of 500-650 kilograms of high-yield Mushi nitrogen is 15 kg, phosphorus is 7 kg, potassium is 5 kg (15 kg of ammonium diammonium, 26.7 kg of urea, and 10 kg of potassium sulfate).
Fertilization method: All phosphorus and potassium fertilizers are applied as the base fertilizer at one time. High-yielding fields use 40% of nitrogen fertilizers to attack stalk fertilizers and 60% of panicle fertilizers; 10% of seed fertilizers are used in mid-range fields, 50% of stalk fertilizers are used for nitrogen fertilizers, and 40% of panicle fertilizers are attacked.
Third, pest and weed control (1) chemical weeding. Pre-emergence weeding after sowing: Mixing with astragalonitrile suspension and acetochlor EC, or Ding A mixture, etc., for soil closure, evenly spraying the surface between the rows. When soil moisture is insufficient, it is necessary to appropriately increase the amount of water used for spraying. Maize post-emergence weed control: Generally, at 5 o'clock in corn, we spray stalks and leaves of weeds between corn lines with jatrophe and traceless spray. Spraying onto corn plants is strictly forbidden to cause phytotoxicity.
(2) Control pests. The main pests of summer corn seedlings include ground tigers, aphids, thrips, cotton bollworms, etc. The insect pests should be timely monitored and reported, and pests should be promptly controlled.
Fourth, seedling management Summer corn seedling management center task is to promote root growth, nurturing strong seedlings, lay the foundation for high corn yield. The main technical measures for seedling management include timely seedlings, seedlings, seedlings, cultivators, and seedlings.
1, rational close planting. Timely inspection of seedlings and seedlings, seedlings and seedlings during the appropriate period. After maize emerges, it is necessary to frequently check the seedlings in the field. Maize seedlings will have 2-3 leaf stage and time seedlings. The seedlings in the 5-leaf stage will be seedlings, and the diseased, weak, and residual seedlings will be removed to remove large and mixed seedlings and improve the uniformity of the group. The time should be on sunny afternoons. For Zhengdan 958 and other dense-planting varieties, the fertilized blocks usually have 4000-4500 strains of fertile seedlings, and the high-fertilized field blocks generally have 4,500-5000 strains of seed-retaining seedlings; the single fertilizer blocks generally have about 4,000 strains of fertilization blocks, and the high-fertilizer field blocks generally. About 4,500 acres left. When setting seedlings, it is necessary to pay attention to keeping the seedling density generally slightly higher than the number of actually harvested plants.
2, plowing. Maize seedling cultivator can break the soil compaction, promote the roots under the bar, improve the seedling soil permeability conditions. In recent years, summer corn is generally used hard-seemed live, and the height of wheat stubble (15-20 cm) is relatively high, which is unfavorable for corn seed dressing and provides a place for the occurrence of pests. Generally in the post-seedling maize seedlings, the ploughing and hoeing shall be carried out before the seedlings are sown, and the hoeing and weeding are combined. The cultivating depth is preferably 3-5 cm, and the seedlings should be shallow and the rows should be deep. After decomposing the straw, decomposition and decomposition of the straw can also increase soil organic matter.
3, seedlings grow strong. Seedlings should start from the seedling stage and end before jointing. Seedlings should master the principle of “not black, yellow, no fat, no wet, no wetâ€. The “seedlings†at the corn seedling stage can reduce the ear position, increase lodging resistance and drought resistance, and increase water absorption capacity in the later corn period. Seedlings usually grow from emergence to jointing, and the summer corn is about 15-20 days.
4, reasonable irrigation. For field plots with poor vegetation, seedlings can be irrigated after sowing to ensure that the seedlings are neat and uniform.
Second, scientific fertilization According to the law of maize demand, soil fertility, fertility characteristics, and the target yield of scientific soil testing and fertilizer. Generally, the average yield per mu is about 500 kg, which means 12 kg of pure nitrogen, 6 kg of phosphorous, 4 kg of potassium, 13 kg of diammonium, 21 kg of urea, and 8 kg of potassium sulfate.
The average yield of 500-650 kilograms of high-yield Mushi nitrogen is 15 kg, phosphorus is 7 kg, potassium is 5 kg (15 kg of ammonium diammonium, 26.7 kg of urea, and 10 kg of potassium sulfate).
Fertilization method: All phosphorus and potassium fertilizers are applied as the base fertilizer at one time. High-yielding fields use 40% of nitrogen fertilizers to attack stalk fertilizers and 60% of panicle fertilizers; 10% of seed fertilizers are used in mid-range fields, 50% of stalk fertilizers are used for nitrogen fertilizers, and 40% of panicle fertilizers are attacked.
Third, pest and weed control (1) chemical weeding. Pre-emergence weeding after sowing: Mixing with astragalonitrile suspension and acetochlor EC, or Ding A mixture, etc., for soil closure, evenly spraying the surface between the rows. When soil moisture is insufficient, it is necessary to appropriately increase the amount of water used for spraying. Maize post-emergence weed control: Generally, at 5 o'clock in corn, we spray stalks and leaves of weeds between corn lines with jatrophe and traceless spray. Spraying onto corn plants is strictly forbidden to cause phytotoxicity.
(2) Control pests. The main pests of summer corn seedlings include ground tigers, aphids, thrips, cotton bollworms, etc. The insect pests should be timely monitored and reported, and pests should be promptly controlled.
Fourth, seedling management Summer corn seedling management center task is to promote root growth, nurturing strong seedlings, lay the foundation for high corn yield. The main technical measures for seedling management include timely seedlings, seedlings, seedlings, cultivators, and seedlings.
1, rational close planting. Timely inspection of seedlings and seedlings, seedlings and seedlings during the appropriate period. After maize emerges, it is necessary to frequently check the seedlings in the field. Maize seedlings will have 2-3 leaf stage and time seedlings. The seedlings in the 5-leaf stage will be seedlings, and the diseased, weak, and residual seedlings will be removed to remove large and mixed seedlings and improve the uniformity of the group. The time should be on sunny afternoons. For Zhengdan 958 and other dense-planting varieties, the fertilized blocks usually have 4000-4500 strains of fertile seedlings, and the high-fertilized field blocks generally have 4,500-5000 strains of seed-retaining seedlings; the single fertilizer blocks generally have about 4,000 strains of fertilization blocks, and the high-fertilizer field blocks generally. About 4,500 acres left. When setting seedlings, it is necessary to pay attention to keeping the seedling density generally slightly higher than the number of actually harvested plants.
2, plowing. Maize seedling cultivator can break the soil compaction, promote the roots under the bar, improve the seedling soil permeability conditions. In recent years, summer corn is generally used hard-seemed live, and the height of wheat stubble (15-20 cm) is relatively high, which is unfavorable for corn seed dressing and provides a place for the occurrence of pests. Generally in the post-seedling maize seedlings, the ploughing and hoeing shall be carried out before the seedlings are sown, and the hoeing and weeding are combined. The cultivating depth is preferably 3-5 cm, and the seedlings should be shallow and the rows should be deep. After decomposing the straw, decomposition and decomposition of the straw can also increase soil organic matter.
3, seedlings grow strong. Seedlings should start from the seedling stage and end before jointing. Seedlings should master the principle of “not black, yellow, no fat, no wet, no wetâ€. The “seedlings†at the corn seedling stage can reduce the ear position, increase lodging resistance and drought resistance, and increase water absorption capacity in the later corn period. Seedlings usually grow from emergence to jointing, and the summer corn is about 15-20 days.
4, reasonable irrigation. For field plots with poor vegetation, seedlings can be irrigated after sowing to ensure that the seedlings are neat and uniform.
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