Early flowering top-dressing soybeans at the beginning of flowering can generally increase production by about 10%. When the number of soybean flowering plants reaches 10%, 10 kg of urea, 20 kg of calcium superphosphate and 15 kg of diammonium are applied per acre. Such as foliar spray 1% urea water and potassium dihydrogen phosphate solution, the better. Spraying paclobutrazol on paclobutrazol resulted in dwarfing of soybean plants, thickening of leaves, extension of leaf functional period, and suppression of leggy. Generally, from soybean to branching to flowering, a 250-ppm paclobutrazol solution is evenly sprayed in 50 mu. Topping sowing on soybeans with tendencies of leggy and lustful late-maturing, the method of topping at the early flowering stage or flowering stage will remove about 2 centimeters from the end of the main stem to control its vegetative growth. It can also use the method of threshing. When the soybean plants appear to be indefinite, after the plants are sealed, iron leaves or bamboo pieces are used to scrape off part of the overlapped leaves to improve the ventilation and light transmission conditions, reduce the humidity in the field, and prevent the plants from lodging. . Spraying foliar fertilizers and spraying plant growth regulators such as “increase production spirit†or triiodobenzoic acid can make plants green, strengthen photosynthesis, increase nutrient accumulation, and have obvious effects of increasing glutinous rice, increasing grain, and increasing weight. It is generally sprayed at the early flowering stage, full flowering stage, and early stage of sowing in soybeans, which can increase production by more than 10%.
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