The Latest Control Methods for Heat Damage in Soybeans

A relatively hot agricultural news topic recently is about the continuous rise in temperature in the Huanggang City area, which has a very large impact on crop yields. Therefore, many areas now attach great importance to heat damage, because the weather can change at any time, and high-temperature weather may suddenly shift to their own region. Many growers are also very worried, and the relevant national departments are also very concerned. At the same time, relevant experts have also provided many high-temperature control methods. So today Qinnongwang is here to introduce several control methods for heat damage in soybeans, hoping to be helpful to friends who grow soybeans. Of course, other plantings can also learn from them.

1. Select heat-tolerant varieties

To prevent heat damage in the future, we can select relatively heat-tolerant varieties when planting soybeans. There are so many soybean varieties now that there is always one with extremely strong resistance to heat, such as Changji yellow soybean, Heihe varieties, Hefeng, Dufeng, Qing'an, and so on. The heat tolerance of these varieties is relatively good. These varieties are all new types developed by relevant experts specifically according to the climate and planting conditions of the relevant regions, so we should choose varieties with stronger resistance as much as possible, which can greatly reduce losses.

2. Reasonable planting density

Reasonable planting density is also a small method for preventing heat damage. Although the effect is not very good when real high temperatures arrive, it can still have a certain effect, because if planting is too dense, the field temperature is already relatively high even before high temperatures arrive, and once high temperatures come, the mortality rate increases greatly. So we should make the density as reasonable as possible, which also means planting cannot be too sparse. The best is about 550 to 620 plants per mu on average. The spacing between rows is 50 cm, and the spacing between plants is 40 cm. That is about right.

When the temperature is relatively high, we can lower the field temperature slightly through watering and irrigation. In fact, sprinkler irrigation is a very good method for heat damage control, because water plays a major role in regulating temperature. However, we cannot irrigate at noon every day when the temperature is highest and the sunlight is strongest. It is best to finish sprinkler irrigation for the field in the morning every day, so that by noon only the water in the field will evaporate, thereby reducing damage to soybeans. Second, another sprinkler irrigation is needed from afternoon to evening every day, which can return the soil temperature to its most normal state.

4. Scientific fertilization to enhance resistance

While protecting soybeans through methods, we also need to improve the soybean plants themselves. Since they have already been planted, then we certainly cannot start from the seeds, so we can enhance the resistance of soybeans, that is, their own immunity, through fertilization. During the flowering period of soybeans, we can apply an appropriate amount of nitrogen fertilizer, urea, and foliar fertilizer, which can provide sufficient nutrients to the plants and thereby improve their stress resistance. When spraying foliar fertilizer, it can not only enhance the resistance of soybeans but also have a certain cooling effect. This can be said to kill two birds with one stone.

5. Strengthen pest and disease control

Soybeans are very prone to disease in high-temperature weather, and once disease occurs, it is highly contagious, so the impact on soybean yield is very large. Therefore, during this period we must pay close attention to the growth status of soybeans and at the same time be prepared to prevent pests and diseases. The diseases most likely to occur in high-temperature weather are soybean rust, viral disease, and root rot, so we can spray with wettable powder of hymexazol, or spray with emulsifiable concentrate. At the same time, whiteflies are very likely to appear under high temperatures. They mainly damage the leaf surface of soybeans. We can use 5% acetamiprid spray for control.