After 3-4 days before sowing after soybean sowing, use 50% acetochlor EC 100-150 ml/mu to confine the soil of 30-40 kg of water. If weeds already exist in the field, we can add 20 % Grams 100 ml/mu mixed with it. If soybeans have emerged, it is too late to seal in the soil, and 10% chlorimethanol can be used for emulsifying 60-75 ml/mu, or 15% of spermatozoa can kill 60-75 ml/mu of EC, or 12.5% ​​of Nigrosin EC 60-75 ml/ Mu, 40-50 kilograms of stems and leaves are treated. If single and dicotyledonous weeds are mixed, one of the above-mentioned agents may be used in combination with 40% Kezhiling agent 80-100 ml/mu, or 25% Huwei 80-100 ml/mu.
Early seedlings According to the test, the fixed Ding seedlings can produce about 8%-17% more than the late Ding seedlings. In order to avoid the emergence of linear seedlings and tall seedlings, we should pay close attention to seedlings when we have 3 leaves and 1 heart. The seedling density must distinguish between different varieties and different soil fertility, medium-middle fertility, and large late-maturing varieties of plants, such as Yudou No. 22, No. 25, and No. 16 Liumiao 10 000-12000/mu; middle-fertility plots 12500. -13,500 strains/mu; drought thin, early maturing varieties, such as Yudou No. 20, No. 23, No. 15 Liumiao 1,400-16000 plants/mu.
Early control in the early flowering period of soybeans. If the plants are thin and short, the leaves are small and thin, and the leaves are yellow or light green, the nitrogen and phosphorus fertilizers should be top-dressed with 10-20 kilograms per mu, and the diammonium unilateral furrows can be effective. Reduce the loss of calyx and promote vegetative growth. If the plants are long and closed, spraying with paclobutrazol 150 mg/kg or 200 mg/kg full bloom at the early flowering stage can inhibit the plant height, control the internode elongation, and reduce the growth rate.
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