Field management techniques of soybean in the middle and later stage

1. Management of flowering and podding period the main task of this period is to strive for more flowers, early flowering, full flowering, increasing flowers and pods, and preventing the shedding of flowers and pods. It is necessary to look at seedling management, the combination of protection and control, high-yield fields to control mainly, to avoid premature ridge closure, in order to achieve the maximum leaf area at the end of flowering. Specific measures: continue weeding before sealing ridges, look at the seedlings as appropriate after water and fertilizer, early flowering stage should be topdressing for weak seedlings, not topdressing for strong seedlings to prevent overgrowth. The effect of topdressing phosphate fertilizer at flowering and pod stage was obvious, during this period, soybean leaf area reached the maximum, water consumption increased, transpiration intensity and water demand reached the peak. When the leaves are old green and wilted at noon, they should be watered in time, otherwise the flowers and pods are easy to fall off. Picking the top (removing the 6cm tip) at the end of flowering can prevent lodging and promote the supply of more nutrients to flowers and pods. However, it is not suitable for soybean varieties with limited podding habits and soybeans cultivated in barren soil.

Second, the management of grain filling maturity period is the period when soybean accumulates the most dry matter. The main task of management in this period is to promote the transfer of nutrients to grains, to promote grain satiety and grain weight, and to promote early maturity of soybean. During this period, the lack of water will increase the number of blighted pods and grains and decrease the weight of 100 grains. If there is no rain in case of drought, it should be watered in time. Attacking seeds with water has an obvious effect on improving the yield and quality of soybean.