The so-called "secondary growth" of cotton is that after a large amount of cotton is concentrated on the peach, several layers of no effect branches are formed in the upper part of the cotton plant, or a batch of vegetative branches appear in the leaf axils of the fruit branches, and the two types of shoots are successively sprouted. A group of young buds and small flowers. These young buds are difficult to form effective bells, which have disadvantages for the late growth of cotton.
So why does cotton produce "secondary growth"? There are mainly the following reasons: First, the high temperature and drought in the early stage, some farmers applied cotton ring fertilizer or peach fertilizer to cotton, did not organize drought resistance in time, cotton did not absorb nutrients, and the nutrient concentration was released after the recent rainfall, making it extended. Fruit branches or vegetative shoots; second, the cotton field is over-fertilized, and it is not chemically regulated in time. For example, a farmer's 3 mu cotton field, the early cotton grows prosperously, and 15 kg of urea is applied as a peach fertilizer per acre, so the cotton is in a madness; It is the excessive chemical regulation of cotton in the early stage, which inhibits the normal growth and development of cotton. After the rain, the growth of cotton plants is relieved, and the branches, buds and small flowers are regenerated. Fourth, the cotton plantings are vegetables or fruit trees, the soil fertility is sufficient, and the growth and development of cotton It is also prone to "secondary growth" when it is "combine" with the release of fertilizer water.
In order to avoid "secondary growth", it is necessary to quickly remove the non-effect branches, vegetative shoots and their young buds and florets; secondly, thoroughly eliminate the inefficient branches and leaves in the middle and lower parts of the cotton plant to enhance the ventilation and light transmission properties; Then spray the acetaminophen or the auxin to cap, use 5 grams of ketamine or 20 ml of auxin per acre, and spray 40 to 50 kilograms of water.
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