How to judge whether soybeans are prosperous or not?

Soybean itself has excellent nitrogen fixation and does not need to apply a large amount of nitrogen fertilizer like other crops, so it is easy to grow too much, such as improper fertilizer and water, unsuitable temperature and so on, especially if too much nitrogen fertilizer is applied, it is easy to cause prosperous growth. this leads to lodging of soybean, which is disadvantageous to yield and quality. What about any judgment that soybeans are thriving? How to control it? Let's get to know it.

First, judge whether soybeans are prosperous or not.

1. Leaves

The leaf growth of soybean is very exuberant, the field is completely closed, the leaf photosynthesis index is low, and the permeability is poor, which can easily lead to excessive growth of stems and leaves.

2. Leaf color

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

3. Inflorescence

We can also judge whether the soybean is overgrown according to the number of inflorescences. If there are a few inflorescences in the upper part of the main stem and few inflorescences in the branches and the lower part of the main stem, it is also a sign of vigorous growth.

2. Prosperity control technology

Once the above three situations occur, soybeans can not be allowed to continue to grow freely, it is necessary to timely adopt prosperity control technology, one is artificial prosperity control, and the other is chemical control.

1. Manual topping

Artificial topping is suitable for small planting area, where there is overgrowth of soybean, pinch off its top growth node, do not beat at will, and follow the principle of "hitting early but not late, fertilizing not thinning, thinning and thinning". And tapping should not be too hard, just pinch off the top of the main stem 2-3cm, pinching too long may affect the follow-up growth of soybean.

2. Chemical control

General chemical control and other crops, generally use paclobutrazol, it can effectively inhibit plant growth, in use should pay attention to the concentration, in accordance with the instructions to apply the dose, in order to avoid excessive concentration, resulting in slow or stagnant growth of soybean. When administering the medicine, you must see the flowers before you can apply the medicine. If you find that the soybeans in the field are growing very tall, if you do not see the flowers, you can not apply the medicine.

The above is how to judge whether the soybean is prosperous or not. I hope it can help you. If you want to know more about it, please follow us.