Detailed Analysis of Soybean Lodging Causes and Prevention Methods

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

1. Weather causes

In the middle and late stages of soybean growth, the plants are 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 hope that the lodging area is smaller and the damage is less severe.

2. Variety causes

Soybean lodging is related to some extent to its variety. Some soybean varieties grow very tall, but their stems are relatively thin and weak, and their own lodging resistance is weak, so when planted in plots with sufficient fertilizer and water, lodging is extremely 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 root system does not grow deep, and large-scale lodging is extremely likely to occur.

Prevention method: Pay attention to density when planting. It is not that the denser the planting, the higher the yield; the result may be exactly the opposite. Not only is lodging likely to occur, but yield will also be affected. Therefore, reasonable close 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: Control the amount of nitrogen fertilizer applied during planting. When sufficient base fertilizer is applied, do not apply nitrogen fertilizer during topdressing. When topdressing at the flowering stage, reasonably apply nitrogen fertilizer according to the growth condition of the soybeans. For those with good growth, apply a little less, about 5 kg per mu. At the same time, reasonably combine phosphorus and potassium fertilizers 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 stay tuned to us.