How to judge whether soybeans are prosperous or not

Soybean itself has excellent nitrogen fixation, unlike other crops that need a large amount of nitrogen fertilizer, so it is easy to appear excessive growth phenomenon, such as improper fertilizer and water, inappropriate temperature and other problems, especially excessive nitrogen fertilizer application, easy to cause vigorous growth, thus leading to soybean lodging, unfavorable yield and quality. So what about any judgment of soybean bloom? How do you control it? Let's get to know each other.

1. Determine whether soybeans are prosperous

1, blade

Soybean leaves grow very vigorously, the field is completely closed, leaf photosynthesis index is low, poor permeability, easy to cause excessive stem growth.

2, leaf color

When the color of the upper part of the soybean leaves becomes dark green, and the leaf area is very large, and the leaves below the middle have begun to yellow, some leaves even appear to fall off.

3. Inflorescence

It is also possible to judge whether soybeans are overgrown according to the number of inflorescences. If there are a few inflorescences on the upper part of the main stem and few inflorescences on the branches and lower part of the main stem, this is also a prosperous performance.

II. Prosperity control technology

Once the above three situations occur, soybeans cannot be allowed to continue to grow freely. It is necessary to adopt prosperous control technology in time, one is artificial prosperous control, and the other is medicament prosperous control.

1. Artificial topping

Artificial topping is suitable for planting area is small, in the soybean appears excessive long place, its top growth node pinched off, do not randomly hit, to follow the "early not late, fertilizer not thin, thin not dense" principle. Moreover, it is not appropriate to tip too hard, just pinch off the top of the main stem 2-3cm, pinching too long may affect the subsequent growth of soybeans.

2. Drug control

General pesticide control and other crops, generally use paclobutrazol, it can effectively inhibit plant growth, pay attention to the concentration when using, according to the instructions of the dose application, so as not to over-concentrated, resulting in slow growth or growth stagnation of soybeans. When spraying, you must see flowers before you can apply medicine. If you find that the soybean in the field grows very high, if you don't see flowers, you can't apply medicine.

The above is how to judge whether soybeans are prosperous, I hope to help you, want to know more about the relevant knowledge, please pay attention to us.