Causes and remedial measures of cotton defertilization

Cotton is one of the main crops in the world, and we can't live without it. If we want to plant cotton well, fertilization is an important work. However, in the middle and later stages of cotton growth, there will be the phenomenon of de-fertilization, which will lead to the decline of cotton production and affect the income of farmers, so what is the reason for cotton de-fatting? How to remedy it? Let's take a look at the detailed introduction.

1. Characteristics of fertilizer requirement

The normal growth and development of cotton requires many elements such as nitrogen, phosphorus, potassium, iron, zinc, copper and manganese. According to research, for every 100 kilograms of cotton, 13.36 kilograms of pure nitrogen, 4.65 kilograms of phosphate fertilizer and 13.35 kilograms of potash fertilizer are needed. Its demand increases with its growth, 5% of nitrogen, 3% of phosphorus and 2% of potassium are absorbed at seedling stage, 11% of nitrogen, 7% of phosphorus and 9% of potassium are absorbed at bud stage; 56% of nitrogen, 24% of phosphorus and 36% of potassium are absorbed at flowering stage; 23% of nitrogen, 52% of phosphorus and 42% of potassium are absorbed at boll opening stage; 5% of nitrogen, 14% of phosphorus and 11% of potassium are absorbed by cotton. From this data, it can be seen that the fertilizer demand of cotton in the whole growth period is less-more-less. When applying fertilizer, we should pay attention to the demand of nitrogen, phosphorus and potassium fertilizer in each growth stage and apply fertilizer reasonably.

2. Reasons for losing fat

There are two main reasons for cotton de-fertilization. the first is that the loss of base fertilizer applied in the early stage is more serious, while in the later stage, Rain Water is more and the rain period is too long, which leads to inconvenient fertilization, untimely topdressing and the phenomenon of de-fertilization. On the other hand, the fertilization is unreasonable and the fertilization method is wrong, sometimes farmers spread fertilizer directly on the surface, resulting in serious fertilizer loss, so there is the phenomenon of de-fertilization.

3. Remedial measures

Remedial measures should be taken for the de-fatted plants to avoid aggravation of symptoms, of which the most effective method is extra-root topdressing, which can quickly supplement the nutrients needed for plant growth and promote the plant to return to normal. The recoverable fertilizers are 1%, 2%, 2% urea, 0.2%, 0.3%, and 0.3% potassium dihydrogen, or they can be sprayed with plant growth promoters, which can be sprayed 2-3 times according to the growth of cotton, which can relieve the symptoms of cotton desalination.

The above is the introduction of cotton fattening reasons and remedial measures, hope to help you, want to know more related knowledge, please follow us.