Autumn corn grabbing and planting technology
It is to catch spring corn. For mature corn pods, good weather should be collected as soon as possible, and dry in a timely manner to reduce losses. The second is timely drainage. For corn that has not yet fully matured, pay attention to timely drainage to reduce the soil and air humidity in the field and promote early maturing. The third is to grab autumn corn. For the already harvested plots, the autumn corn and other cash crops must be promptly rushed to provide disaster relief.
Autumn corn grabbing and planting techniques are as follows:
Choose good breeds. According to the characteristics of high temperature and low temperature in early stage of the growth of autumn corn, high-yielding and early-maturing varieties suitable for cultivation in high temperature season at seedling stage, fast grain filling in later stage, and resistance to fertilizer and lodging are selected, such as Yuyu 22, Linnong 1 and Hunan. Yongdan 3 and so on.
Early sowing when grab. Autumn corn is best sown at the end of July and early August. It is best to finish sowing before August 5 and pay attention to germination before sowing.
Seed treatment. The first is to use sun drying before sowing. Second, soaking seed dressing, the best choice for coating seeds, soaking in chemical agents are mainly potassium dihydrogen phosphate and trace elements, but the concentration of soaking is too high or soaking time is too long, the seeds are vulnerable to poisoning, reduce the germination rate.
Closely planted. Planting density of autumn maize should be increased by 500-800 plants/mu compared with that of spring maize, sowing spacing is 60-73 cm, plant spacing is 23-30 cm, depth is 5-6 cm, 2 plants are planted per hole, leave single plant, use per acre The amount of 2.5-3 kg guarantees 3500-4000 basic seedlings per mu.
Scientific fertilization. Combining ploughing and soil preparation, 1500 kg of bar fertilizer or soil miscellaneous fertilizer should be applied per acre as a base fertilizer, and 50 kg of compound fertilizer should be applied as a seed fertilizer (without contacting seeds) when sowing; 15-20 days after sowing Thin manure and urine for strong seedling fertilizer; jointing until earing before heavy ear fertilizer, mu compound fertilizer 15 kilograms or cake fertilizer 20 kilograms open acupuncture deep; 5-7 days after corn silking, grain per acre with a pack Spraying foliar on 40 kg of water can prevent premature aging, reduce baldness and increase the number of grains per ear.
Miao Dingmiao. 2 true leaves grow time seedlings, weak to stay strong; 5-7 true leaf when the Dingmiao, leaving a seedling per hole; found lack of seedlings, timely transplanting with soil to make up seedlings.
Cultivating earth. After maize emerged, we carried out timely cultivation and weeding. In the jointing stage, after cultivating the loose soil in the cultivator, combine the soil with soil. When the top-dressing was used for the last time, the soil on the loquat was cultivated higher to prevent the wind from falling down.
Drought resistant stains. In the event of drought in corn seedlings, the horse should be irrigated once after 4 pm to prevent drought and protect seedlings. In the middle and later periods, more water is required. In case of drought, furrow irrigation must be carried out; in case of autumn and rain, water should be drained in time. Stains.
Prevent pests. Pay attention to ground tigers at the seedling stage; jointing and booting period, use 50 grams of methamidophos and trichlorfon to water or mix 10-15 kilograms of fine soil to the heart and leaves, which can effectively prevent and control the third generation corn borer.
Interlaced. Only 1/3 of the male male flower has been extracted. Before the powder is loosened, the male flower is pulled out every other row, which can provide limited nutrient and water concentration to supply the growth of the ear, reduce the height of the plant, and improve the lighting conditions. Generally, it can increase production by 6% to 12%.
Artificially assisted pollination. Artificially assisted pollination at 9-11 a.m. After dehydration at the silking stage of the female corn flower, the male flower is shaken with a bamboo pole or pull string. It is carried out once a day for 2-3 times, pollinating the pollen, increasing pollination opportunities, and reducing the number of missing grains. And baldness, raise the seed-setting rate.
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