How to hit the top of the latest cotton

Cotton is an important textile raw material in our life, and China is also a big cotton planting country in the world. Topping is an important measure to increase cotton production when planting. Cotton topping can eliminate the top growth advantage of cotton, adjust the transportation direction of water, nutrients and other substances in the body, avoid nutrient consumption, and have an obvious effect of increasing production and income. So when will the cotton topping be done? How should it be implemented? Let's take a look.

1. Topping time

The time of topping is extremely important, if the topping is too early, the growth of the upper fruit branches of the plant is strong, which can easily lead to heavy concealment in the field, poor permeability, resulting in the increase of rotten bolls; too late topping, too many ineffective buds, and delayed boll opening maturity. the yield and quality will also be affected to a certain extent. Therefore, topping must be timely, from the plant growth, soil fertility, centering and air temperature and other factors to determine the topping time. In general, it takes more than 80 days for buds to bloom to open bolls in the later period, and the appropriate period for topping is 80-90 days forward according to the first frost period.

2. Topping method

In topping, we should first remove one leaf from the top, while different plots should hit the weaker plots first, and then the stronger ones. And the same piece of land topping, it is necessary to part of the size of one by one, it is best to hit the top at a time, not in batches, and there are no missing plants. At this time, because the top is the concentration of pests to take you, so hit the top, can effectively reduce insect pests.

3. Control prosperity after hitting the top

Boom control should be carried out 1-2 times after topping, and the first boom control should be carried out before and after a week of topping. 4-5 grams of promethamine per mu can be diluted with 30 kg water and sprayed, which can well control invalid buds, reduce superfluous buds, shape plants and increase yield per mu. The second time is about a week for the first time, when the dose is increased and sprayed with 8-10 grams of ketamine diluted with 30 kilograms of water per mu. If the plant grows too well, the dose can be increased according to the actual situation.

4. Fertilizer and water management

After topping, cotton should be reasonably watered and fertilized according to the growth of the plant, generally applying compound fertilizer 5-8 per mu, and appropriate boron should be added. 50 grams of water can be sprayed with 50 grams of water per mu. After topping, cotton will soon enter the peak growth period of flowers, buds and bolls, which is also the period when cotton needs the highest moisture, so it should be watered in time after topping. Watering should be sufficient with small water, not too much at one time, but also suitable for investment watering according to the actual situation, so as not to cause greedy green late ripening phenomenon and affect the output.

The above is how to top cotton introduction, hope to help you, want to know more related knowledge, please pay attention to us.