Soybean cultivation: how to fertilize soybeans?

How to top up soybeans? Please introduce scientific topdressing methods for planting soybeans. General topdressing can be divided into seedling fertilizer, flower fertilizer and granulation fertilizer. Detailed methods can be referred to the following: soybean seedling fertilizer: soybean seedling nodule is in the stage of formation and there is no nitrogen fixation capacity. If nitrogen nutrition can not keep up, it will affect the early development of strong seedlings. Early topdressing can promote the growth of roots and leaves. Generally speaking, when the first compound leaf is unfolded, 4-6 kg of urea is applied per mu. Applying appropriate amount of phosphate fertilizer at seedling stage is beneficial to promote the formation and development of soybean root nodules, and 8-10 kg calcium superphosphate can be applied per mu. Soybean flower fertilizer: soybean flower and pod stage is the peak period of chemical fertilizer absorption, appropriate amount of nitrogen fertilizer can be applied at the early flowering stage, which can reduce the shedding of flowers and pods and increase the yield by 15-20% per mu. Generally, 5-8 kg of urea per mu is applied at 5-7 cm away from the root of soybean, and the soil is covered after application. If the soil is fertile and the plant grows healthily, then little or no nitrogen fertilizer is applied. When there is insufficient application of phosphorus in the base fertilizer, 7-10 kg superphosphate can be applied per mu in this period. Granulation fertilizer: after soybean entered the pod filling stage, the nitrogen fixation ability and root activity of rhizobium gradually declined, and the fertilizer absorption capacity weakened. Foliar fertilizer spraying should be adopted to supplement nutrition and reduce flower and pod drop. Generally, 50 kg of 0.3% potassium dihydrogen phosphate solution per mu was evenly sprayed on the front and back of the leaves from 4 pm to evening, 2-3 times in a row. If there is the phenomenon of denitrification, 0.5 kg urea can be mixed and sprayed each time. The cause of blighted Grain in Soybean the method of increasing yield of cultivated Soybean Click to get more Soybean planting techniques