Early broadcast

    In late May to mid-June is the summer suitable sowing soybeans, and the higher the yield sown earlier. The test proved that since the beginning of June , it was broadcasted for one day every night , and the average yield per mu was about 2 kg. Since the end of June , it was broadcast for one day every night , and the average yield per mu was about 3 kg. Early sowing can prolong the vegetative growth period of soybeans, increase the accumulation of dry matter, and increase economic output. Therefore, it is necessary to sow as soon as possible after the summer harvest. It is best to use the wheat straw returning machine to "kill the cockroach" and plant it. Generally, 5 to 6 kilograms per acre are used , the row spacing is about 40 centimeters, and the sowing depth is 3 to 5 centimeters; there are about 12,000 seedlings per acre , the early maturity varieties should be dense, the late-maturing varieties should be thin, and the early-sown, high-fertility plots should be Rare.

    Scientific fertilization

    Generally, the fertilization principle of high-yield soybeans should be based on the application of farmyard manure, organic and inorganic combination; the application of chemical fertilizers, nitrogen, phosphorus and potassium fertilizers, supplementing micro-fertilizer; high-yield fields, re-application of phosphorus and potassium fertilizers, and thin application of nitrogen and phosphate fertilizers. Based on the base fertilizer and supplemented by topdressing, apply the seed fertilizer as appropriate, and carry out foliar spray fertilizer.

Irrigation chemical weeding. The cultivating can eliminate the weeds, store the water in the dry, protect the sputum, and break the sputum. It can also break the knot, loosen the soil, improve the physical and chemical properties of the soil, coordinate the relationship between water, fertilizer, gas and heat in the soil, and promote root growth and microbial activities. Accelerate the decomposition of organic matter such as wheat bran and improve soil fertility. At the same time, it is beneficial to the development of rhizobium and the formation of nodule, and improves nitrogen fixation capacity. Therefore, the sowing of soybean seedlings is an important measure to promote early seedling growth and cultivate strong seedlings. The most effective method for chemical weeding is to perform a soil chemically closed weeding before emergence after sowing, and eliminate the weeds before and after excavation.

    Prevention of pests and diseases

    Timely sowing, rational rotation and other agricultural measures can reduce pests. In the sowing period of summer soybean, seed coating agent or carbofuran granules can be applied to control underground pests such as cockroaches to ensure full seedlings; seedlings are mainly used to control mites, and 10% of imidacloprid WP can be used for 12 to 18 grams per acre . 40 ~ 50 kg for spraying; spraying 1% avermectin EC 2000 ~ 3000 times dilution to control the black bean fly, and cure the leaf insect pest; the pod granule period spray 1% Avi per acre Abamectin EC 2000 to 3000 times dilution or fenvalerate 20% EC 30 ~ 40 ml of 40 ~ 50 kg of water spray, and can prevent soybean pod borer borer, rid of leaf-eating insects. Further, the choice of control downy mildew metalaxyl wettable powder 35% or 80% Fosetyl aluminum WP 600 ~ 700-fold dilution of spray; anthrax prevention and the like may be sprayed purpura 1: 1: 100 fold Bordeaux mixture or 80% mancozeb wettable powder 600 to 800-fold dilution.

    Rational irrigation and drainage

    Drought and flood occur during the growth of soybeans. The flower pod stage is most sensitive to moisture, followed by the drum stage. From the beginning of the flowering period to the middle of the granules (about 60 days), it is the most critical period for summer soybeans. If you rely on natural precipitation, it is difficult to meet the water demand of summer soybeans. Therefore, in order to obtain high yields of summer soybeans, it is necessary to timely discharge irrigation according to the demand for water in different growth stages.