Scientific fertilization can reduce cotton bud and boll shedding.

The vegetative growth (root, stem, leaf growth) and reproductive growth (bud, boll, boll growth) of cotton are not coordinated, resulting in the imbalance of the supply, transport and distribution of photosynthates in cotton plants, which is an important reason for the shedding of cotton buds and bolls. Through comprehensive measures centered on fertilization, controlling cotton growth is an important means to reduce cotton bud and boll shedding. Practice has proved that controlling the stem and leaf growth of cotton in the early stage, setting up a high-yield shelf in the middle stage to make it grow steadily and preventing premature senescence in the later stage is an effective way to reduce the shedding of buds and bolls in the middle and lower parts. Therefore, in addition to reasonable close planting and strengthening water management, scientific fertilization is the key. In general, if you look at the seedling situation and apply seedling fertilizer, in addition to nitrogen fertilizer, you can also apply appropriate amount of phosphorus and potassium fertilizer as appropriate to prevent excessive growth of stems and leaves and avoid premature closure, which is beneficial to more bolls in the middle and lower parts. Stable application of bud fertilizer and organic fertilizer is appropriate to gradually release nutrients, control the stable growth of cotton plants, coordinate vegetative growth and reproductive growth, help to strive for light, and produce more organic nutrients to meet the needs of vegetative growth and reproductive growth. Re-application of flower and boll fertilizer to prevent premature senescence in the later stage, when the cotton plant has changed from vegetative growth to reproductive growth, most of the organic nutrients have been allocated to the reproductive organs, it is appropriate to apply a small amount of available nitrogen fertilizer.

In addition, some plant hormones (such as dwarf, etc.) also play an important role in regulating the transport direction of photosynthate. Because hormones can promote the transport of organic nutrients to the developing young bolls, this is beneficial to the development of young bolls and the shedding is significantly reduced.