The vegetative growth (root, stem, and leaf growth) and reproductive growth (bud, bell, and flocculation) of cotton are inconsistent, resulting in unbalanced supply, transport, and distribution of photosynthetic products within the cotton plant, causing cotton buds and bells to fall off. important reason. Through comprehensive measures centered on fertilization, controlling cotton growth is an important means to reduce the shedding of cotton buds. Practice has proved that controlling the growth of stems and leaves in the early stage of cotton and setting up a high-yield shelf in the middle period to make it stable and prevent premature aging at an early stage is an effective way to reduce the shedding of bells in the middle and lower parts. Therefore, in addition to rational dense planting and strengthening water management, scientific fertilization is the key.
Generally grasp the seedling situation, apply Miao Fei, in addition to the use of nitrogen fertilizer, but also appropriate appropriate phosphorus and potassium fertilizer, to prevent overgrowth of stems and leaves, to avoid premature closure, is conducive to the middle and lower part of the bell; stable Shi Lei fertilizer , And the application of organic fertilizer is appropriate, the gradual release of nutrients, control the stability of cotton plants, so that the vegetative growth and reproductive growth coordination, is conducive to fighting for light, can produce more organic nutrients, to meet the needs of vegetative growth and reproductive growth The flower and bell fertilizer is reused to prevent premature aging. At this time, the cotton plant has been transferred from vegetative growth to reproductive growth. Most of the organic nutrients have been distributed to reproductive organs, and a small amount of fast-acting nitrogen fertilizer should be applied. In addition, certain plant hormones (such as chlormequat, etc.) also play an important role in regulating the transport of photosynthetic products. Since hormones can promote the transport of organic nutrients into developing young bells, it is beneficial to the development of young bells and the shedding is significantly reduced. (also Mei)
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