The phenomenon of excessive growth of vegetative organs such as stems, branches and leaves of cotton plants and the loss of balance between vegetative growth and reproductive growth is known as an animal grower. After the emergence of cotton, vegetative growth and reproductive growth occur simultaneously. If vegetative growth is too fast, reproductive growth is inhibited, resulting in shedding of bells, and in severe cases, no bell-ring phenomenon occurs, resulting in a reduction in cotton field production.
â–² Length of reason
The main application is fertilizer and water. From the bud to the beginning of flowering, it is the fastest period of vegetative growth in cotton. If the supply of nitrogen fertilizer is too much, the ratio of carbon and nitrogen metabolism will be imbalanced and the vegetative organs will grow too quickly. In the cotton area of ​​the Yellow River Basin, if the amount of nitrogen fertilizer is large during the bud period, the early rain season or the rain after watering can easily cause leggy.
â–²Control method
1. Reasonable fertilization and water-irrigated plastic film Under the condition of applying enough base fertilizer, it is generally not necessary to use the seedling fertilizer. In the high-yield cotton fields with medium and high fertility, fertilization is no longer possible during the bud period. All kinds of cotton fields to re-apply flower bell fertilizer. On the basis of pouring water at the bottom of the irrigation, no irrigation is needed during the seedling stage, and the first irrigation time is appropriately postponed for the bud period so as to “seedling seedlingsâ€.
2. If the phenomenon of leggy is found during the period of budding to the early flowering stage, the cultivator shall use the cultivating device to deeply cultivate the plant 12 to 16 cm near the root of the cotton plant. Cutting off some root systems can effectively control the growth in a short period of time.
3. Systematic control of ghetto control is the most effective measure to control cotton buddies. The first time of general chemical control should be carried out in the budding stage of cotton. The amount of mu should be controlled between 0.3 and 0.8 grams. The whole growth period of cotton needs to be controlled 3 or 4 times, and the principle of “before light and heavy†should be mastered. It can be flexibly used according to the specific conditions of the species and the local climate.
4. When the pruning cotton plants appear to be long, some of the main stems and leaves may be removed and the vegetative growth of the cotton plants may be inhibited.
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