Misunderstandings in Cotton planting
Myth 1, sparse planting saves work for cotton farmers, but the boll setting per plant limits the yield of cotton. According to the investigation, the bolls per plant of cotton farmers are mostly between 30 and 40. It is very difficult to tie more than 50 bells. According to the theoretical data, one jin of seed cotton is produced per 100 bolls. Planting 1000 plants per mu with 50 bolls per plant will yield 500jin of seed cotton. If there are 25 bolls per plant of 2500 plants, the yield of seed cotton is 625jin per mu.
Thus it can be seen that high yield and density of cotton is the key. Only with reasonable density can high yield be achieved.
Misunderstanding 2, fertilization due to the reduction of farm manure in recent years, the soil organic matter also decreased. In addition, the excess of inorganic fertilizers such as nitrogen and phosphorus caused the structure of the soil to be abusive, and the consolidation of the soil aggravated the disease of cotton. It has seriously affected the yield of cotton. Reasonable fertilization technology is also a necessary means to increase cotton production.
Misunderstanding 3, chemical control most cotton farmers are spraying chemical control drugs in the later stage of cotton. In this way, the use of chemical control drugs will not work, more will inhibit the growth point and reduce the number of bolls of cotton. Reasonable chemical control should be applied in small amounts and multiple times.
Misunderstanding 4, the late management of cotton is very important, according to multi-point survey, farmers who can spray foliar fertilizer in time can solve the problem of premature senescence of cotton and improve the ability of disease resistance.
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Application proportion of Special Fertilizer in Cotton drip Irrigation Field
First, the total amount of cotton fertilizer input in high latitude sub-suitable cotton areas per unit yield of seed cotton 300-380 kg, the need to put 70-80 kg of natural fertilizer, equivalent to 160-180 kg of standard fertilizer. To achieve "jin fat cotton". If you put 1 kg of standard fertilizer, you can produce 1 kg of lint. 137 regiment soil test results and cotton plant nutrition diagnosis generally lack zinc, 1-2 kg zinc fertilizer is applied in autumn, and the yield is increased by 5% and 10%. For plots rich in potassium, the application of potash fertilizer is 5-10 kg, especially
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Leaf blight of cotton
The symptom is also known as Cercospora leaf spot of cotton. It is mainly harmful to leaves. Most of the cotton infected in the late growth stage, at first produced many dark red dots on the leaves, and then expanded into nearly round, purplish red on the edge, slightly raised, brown in the middle, and produced a white mildew layer under wet conditions, that is, the conidiophores and conidia of the pathogen. The damaged leaves are easy to break. The pathogen Mycosphaerellagossypina (Cooke) Earle is called Gossypium, which belongs to ascomycetes subphylum fungi. Ascospores globular black, ascospores
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