Key points of soybean seed filling stage management

In soybean production, the soybean grain filling stage is a more important period, which has a great impact on the yield. At this time, the growth is in the peak period, and the grain gradually expands, which is the period of soybean dry matter accumulation. So how to manage the grain filling period of soybean? Let's get to know it.

1. Extra-root fertilization

After entering the filling stage, the vegetative growth of soybean basically stopped, and the reproductive growth was in the peak stage, when a large amount of nutrients in the plant were transported to the grain to promote grain expansion, which was the period of the most dry matter accumulation. At this time, soybean has a great demand for phosphorus and potassium fertilizer. before that, most of these nutrients were moved from the soil through the root system, but the transformation of nutrients into porridge in the soil was weak, which also led to the incoordination between the nutrient demand of soybean and the fertilizer supply capacity of the soil. it is easy to appear nutrition deficiency and premature senescence, which has become the main factor limiting the high yield of soybean. Therefore, the method of extra-root fertilization can be adopted during the grain filling stage of soybean, which can effectively alleviate the contradiction between fertilizer demand and supply of soybean, and accelerate the accumulation, transformation and transportation of assimilation products. 0.3 kg urea and 70 kg potassium dihydrogen phosphate per mu can be used to spray 30 kg of water, foliar spraying, the effect is better, 2-3 times according to the growth.

2. Rational irrigation

When soybean expands, it needs not only nutrients, but also sufficient water, and the grain filling period is just after the rainfall peak, so Rain Water is less, and the moisture in the soil is often insufficient, resulting in the phenomenon of "autumn hanging". It has a great impact on soybean expansion, so it can timely irrigate and replenish water, promote grain expansion, and improve yield and quality.

3. Weeding

The weeding work should be strengthened during the soybean grain filling period, and the weeds and soybean seeds will expand and compete for water and fertilizer, which will inhibit the reproductive growth of soybean, so weeding must be done frequently. At this time, it is in the mature stage, it is not suitable to spray pesticides, so it is harmful to human health, so it is recommended to pull out the weeds in the field manually.

4. Pest control

At this time, it is also a period of high incidence of soybean heart borer and pod borer, they will eat in the pods, but continue to eat the seeds, nibbling up the pods, resulting in a decline in yield and the spread of diseases. Therefore, it is necessary to strengthen pest control measures and timely prevention and control of insect pests when they are found.

The above is the introduction of the main points of soybean seed filling period management, hope to help you, want to know more related knowledge, please follow us.