First, take heart and promote branching. When the spring bean grows two cotyledons, the upper unfolded true leaf is removed (also known as seedling topping). After harvesting, two main strains can be quickly grown on the stem base. At the same time, picking up the heart can make nutrient concentration transfer to new branches, making it grow faster, with thick stems and lush foliage. After picking it up, it can generally increase production by about 20%.
Second, increase the use of lime more flowers. Calcium is an indispensable nutrient for the growth of soybeans. The application of lime can effectively promote the growth of plants and increase the number of calyx, which generally can increase production by more than 15%. Before the flowering, 25~30 kg of lime in Mushi is applied.
Third, increase phosphorus, potassium to promote grain weight. Phosphorus and potassium can help normalize flowering and pollination of soybeans, promote grain filling and increase grain weight. During the flowering to the pod stage, Mushi superphosphate 20 kg, potassium chloride 6 kg, or 120 g of potassium dihydrogen phosphate, spraying 70 kg of water. If the leaves are too yellow, acre 0.5 kg urea mixed spray, spray once every 5 to 7 days, and even spray 2 to 3 times, generally can increase production by 25%.
Fourth, sodium spray increase production. Spring soybeans use 300 g of sodium sulfite during the initial flowering period, spraying 60 kg of water, which can inhibit respiration, reduce excessive consumption of photosynthetic products, and increase dry matter accumulation. This method can generally increase production by more than 30%, and can mature 3 to 5 days earlier.
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Shandong Shengli Bioengineering Co., Ltd , https://www.shenglipharm.com