1, select the species:
Select new varieties that are suitable for high yield, good and disease resistance in this region. In alpine mountainous areas, varieties with short growing periods such as Huidan No. 4 and Great Wall 799 were selected; in middle and low-altitude areas, varieties with long growth periods such as Beiyu 21, Yunrui 88, and Jiyuan No. 8 were selected.
2, timely sowing:
Corn is a high-efficiency crop, and only by fully utilizing light and temperature conditions, prolonging the growth of seedlings to form a well-developed root system, stout stem shoots, and accumulation of more nutrients, lay the foundation for large spikes, multiple grains, and high yields. Therefore, most areas in my county should be sown in the middle of May. In order to seize the high yield of corn, it is necessary to achieve direct seeding of whole maize seedlings. Therefore, in addition to guaranteeing the quality of soil preparation and timely sowing of soil moisture, it is necessary to sow seedlings evenly, so that the seed is evenly distributed, deep and smooth, or transplanted to ensure Miao Quan, Miao Qi, Miao Zhuang, to increase the effective number of plants per unit area.
3, reasonable dense planting:
In our county, the planting density is generally 3500-4500 plants, because of different varieties, different fertilizer and water, and different climatic conditions. A compact variety of 4500 acres of planting, 4000 acres of semi-compact planting, 3500 loose plants per acre is appropriate. Planting methods include: planting single lines, waiting for two plants, and wide and narrow rows.
4, formula fertilization:
The main emphasis of fertilization on corn is base fertilizer and panicle fertilizer. See Miao Qiao for Miaofei and jointing fertilizer. Mu 1500-2000 kg of farmyard manure, 60-80 kg of urea, 50 kg of normal calcium, and 15 kg of potassium sulfate. Farmyard fertilizers are used as base fertilizers, Pu-calcium, potassium sulfate as pond fertilizer, and urea as top-dressing fertilizer. After transplanting 10 kg of urea at the 5 leaf stage for seedling fertilizer; 6 to 7 leaves when the mu urea 10 kg for the jointing fertilizer, 10-11 leaves large bell-mouth mu urea 40 kg for panicle fat, found that premature aging de-fertilizer plots Mu can use 10 kg of urea as a granular fertilizer.
5. Comprehensive pest control:
Selecting varieties with stronger disease resistance or lighter disease, changing crop rotation, increasing potash fertilizer, etc. can increase plant disease resistance, eliminate corn plant residues, kill overwinter larvae, and remove dead seedlings, etc., to reduce pests. Pay attention to timely control of gray spot disease, size spot disease, ground tiger, corn borer and so on.
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