Detailed Explanation of the Causes of Soybean Lodging and Prevention Methods

In soybean cultivation, many friends are quite "afraid" of lodging, because once lodging occurs, no matter how severe it is, it will cause a reduction in yield. Generally, it reduces yield by 20%-30%, and in severe cases, it can reach more than 50%. So what are the causes of soybean lodging? How can it be prevented? Let's learn about it together.

1. Weather causes

In the middle and late stages of soybean growth, the plants grow relatively tall. If extreme weather occurs, such as strong winds and heavy rain, and it lasts for a long time, lodging will occur. Moreover, there is no way to avoid this situation; you can only pray that the lodged area is smaller and the damage is less severe.

2. Variety causes

Soybean lodging has a certain relationship with its variety. Some soybean varieties grow very tall, but their stems are relatively thin and weak, and their own lodging resistance is weak. When planted in plots with sufficient fertilizer and water, lodging is very likely to occur. Some varieties do not grow tall, but their stems are thick and strong, and their lodging resistance is strong.

Prevention method: Therefore, excellent varieties should be reasonably selected according to the specific local conditions. For example, for plots with average fertility, varieties with taller growth can be selected, while for plots with good fertility conditions, varieties with shorter growth should be selected. At the same time, varieties with strong stress resistance should be selected, which has a certain effect on preventing lodging in the later stage.

3. Planting density

During planting, the greater the planting density, the more likely lodging is to occur. With high density, ventilation and air permeability in the field are reduced, the plant roots do not grow deep, and large-scale lodging is very likely to occur.

Prevention method: When planting, attention should be paid to density. It is not that the denser the planting, the higher the yield; the result may be exactly the opposite. Not only is lodging more likely to occur, but it will also affect the yield. Therefore, reasonable dense planting is the best. Generally, the specific number of plants per mu depends on soil fertility and climatic conditions. Generally, plots with good fertilizer and water conditions can plant 15,000 plants per mu, and those with average fertilizer and water conditions can plant 25,000 plants.

4. Excessive application of nitrogen fertilizer

Nitrogen fertilizer can promote plant growth and development. Many farmers often apply excessive nitrogen fertilizer when planting. Soybeans themselves produce rhizobia and have strong nitrogen fixation capacity. Excessive application of nitrogen fertilizer will cause soybeans to grow excessively, and the probability of lodging will also increase.

Prevention method: When planting, the amount of nitrogen fertilizer applied should be controlled. When sufficient base fertilizer is applied, nitrogen fertilizer should not be applied during topdressing. When topdressing at the flowering stage, nitrogen fertilizer should be reasonably applied according to the growth of the soybeans. For those with good growth, apply a little less, about 5 kg per mu. At the same time, phosphorus and potassium fertilizers should also be reasonably combined to improve the fruit-setting rate and increase yield.

The above is an introduction to the causes of soybean lodging and prevention methods. I hope it can help you. If you want to learn more related knowledge, please follow us.