First, select good varieties According to species characteristics, productivity, select varieties with high yield, stable yield, early maturity and strong cold resistance to meet the needs of spring, summer and autumn sowing.
Second, timely planting cowpea under open-air planting conditions, sowing can be 3 times a year. It is one of the main ways to obtain high profitability by arranging the sowing time in the best period of the best and most effective period of the breeding period. Spring sowing of cowpeas, generally sowing in mid-and late March, filming after sowing, mulching in late May, summer sowing of cowpea, sowing in general in early May, listing in mid-July; autumn sowing of cowpea: should generally be sowed in early August It will be listed in mid-September.
Third, rational planting of kidney bean spring, summer and autumn sowing, density due to variety characteristics have changed. In principle, we should master more than 2,000 holes per acre, 3 seeds per hole, plant spacing 20-25 cm, row spacing 1.2 cm, double row sowing, mulching after the emergence of green film rupture, half a month after the seedlings sealed nest, summer and autumn The fourth piece of true leaf seedlings sowed in the fourth seedling, with no less than 4000 strains per acre.
Fourth, to strengthen field management film covered spring soy bean, field management to prevent premature aging. Low base fertilizer, less topdressing, slow growth of seedlings, dry field performance, combined with water topdressing or with water and fertilizer topdressing, and strive to achieve strong seedlings early; fat foot, top dressing, no drought in the field, seedlings grow robust and discretionary top dressing. Summer sowing beans are hot and dry due to the weather, seedlings absorb fertilizer and water quickly, the focus of field management is to keep warm by watering. Fertilizer seedlings are weak, and when wilting occurs at noon, they must be combined with watering and fertilization to meet the needs of the growth and development of cowpeas; The focus of field management in autumn sowing beans is to control pests and diseases. Top dressing is timely and appropriate. Apply 15 kg of compound fertilizer per acre on the basis of 1500 kg of fertilizer and 30 kg of phosphate fertilizer per acre; apply 15 kg of compound fertilizer per acre for each 4 true leaves; and change the burrowing. Location, extending vines in the center of the application of urea 10 to 15 kg; after the end of growth as appropriate after top dressing.
V. Prevention and treatment of pests Kidney beans have pods as main pests, and diseases include gray mold. The incidence of spring-sinking pests is small, and summer and autumn sowing are more frequent. Therefore, it is necessary to focus on prevention and control of pests in summer and autumn. For every one of the four true leaves, the first one is prevented, and the inflorescence is prevented from growing for the second time. Afterwards, there is still a trend of development. Adhere to the weekly defense once. 75% of chlorothalonil is used for disease prevention, 50% of acetaminophen WP is 1500 times, and pest control is mainly sprayed with 2.5% kungfu 400 times solution or 25% exfoliating 800 times solution. Can also be used BT emulsion, 7216, insecticide, a killing spirit, BT-781 and other biological pesticides.
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