To improve the seed-setting rate of soybeans and obtain high yields, in addition to selecting good varieties and timely planting, it is particularly important to strengthen the field management of soybeans. The specific measures are to do a good job of “seven defensesâ€:
First, chemical weed control Grassland weed control can increase production by 20%. Before sowing soybean seedlings, 80 ~ 100 ml of 45% bean curd lotion per acre, or 60 ~ 80 ml of 50% diammonium EC is uniformly sprayed on the surface. During the growing period of soybean, use 25% tiger water agent per acre of 70-130 ml, or 10.8% of high-efficiency herb to 25 ml of stems and leaves.
Second, the seedling stage picking up the heart-breaking bean seedlings growing 4 to 5 true leaves, picking off the growing point of the bean sprouts, not only can effectively prevent the plant leggy and lodging, but also conducive to grain filling mature. However, when topping, it is important to note that land with a thick soil layer, good fertility, and a thin soil layer and poor fertility cannot be extracted.
3. Drought-Resistant Drainage and Seed-Receiving Soybeans are both afraid of drought and not resistant to waterlogging. They are very sensitive to water reactions during the flowering stage. This requires the soil to remain mildly moist, and long-term drought or continuous rain can cause severe death. Therefore, in drought-stricken conditions, drought should be avoided, and in case of rainy weather, attention should be paid to trenching and drainage in order to prevent waterlogging in the field and ensure rain and dry weather.
Fourth, flowering, scarring, and fertilizer deficiency and fertilization are the best results before or after flowering. Generally urea urea 4 ~ 5 kg, can also be used 0.2% of potassium dihydrogen phosphate and 0.05% of ammonium molybdate mixed liquid foliar spray, spray usually 1 to 2 times.
V. spray paclobutrazol anti-growth If the plants are long, closed, at the beginning of the flowering period with paclobutrazol 150 mg / kg or full flowering period 200 mg / kg spray, can inhibit plant height, control internode elongation, reduce the growth rate.
Sixth, timely spraying insect pests and soybeans During the calyx, the leaves grow green, vulnerable to a variety of pests, mu 25% insecticide double 200 grams of water 50 kilograms, spray on the pods and leaves, can effectively control the pods Defects of cockroaches, borers, and roundworms.
Seventhly, sparse yellow leaves should be prevented from falling into the mature stage of grain filling, and the old yellow leaves in the middle and lower parts should be removed to prevent the canopy closure in the field and avoid falling out. When 70% of the soybean meal was full, all the leaves could be removed to make the grain full and mature.
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