How to fertilize cotton in the middle and later stage?

How to fertilize cotton in the middle and later stage? Please introduce the cotton mid-harvest period can refer to the following methods of fertilization: first, increasing the application of cotton peach fertilizer is of great significance. August-September is the season for a large number of cotton peaches. In order to bear more peaches, bear large peaches, cover the waist of peaches and cover the top of autumn peaches, we must seize the opportunity to apply enough cotton and peach fertilizer. First of all, the concentrated peach-bearing period of cotton is the peak of fertilizer demand for cotton, and if the supply of fertilizer is insufficient at this time, even the cotton with very good-looking leaves will be de-fatted and will soon become yellow and senile prematurely; secondly, the cotton concentrated peach-bearing period is generally not easy to appear crazy growth or "secondary growth". This is because, after the cotton peach, the direction of nutrient transport changes from the main stem to the cotton boll, and the cotton boll has the ability to carry nutrients; therefore, the application of peach fertilizer at this time will not cause the secondary growth of cotton; third, the cotton boll setting period is the second peak of carbon content in the cotton plant, the nitrogen content decreases, the soluble sugar content increases, the ratio of carbon to nitrogen is the largest, and the nutrients required are the most, not afraid of excessive growth, but for starving seedlings. Fourth, the middle and upper part of cotton is well ventilated and transparent, and the peach setting rate is high, which is generally more than 10 percentage points higher than the lower peach setting rate; the application of peach fertilizer can significantly increase the peach setting rate, promote the growth of cotton peach, greatly improve the cotton yield and quality, and significantly improve the rate of return on input. Second, according to the growth characteristics of cotton in the middle and later stage, we should master the following four points in cotton fertilization: first, we should change our concept and fully realize the great significance of increasing peach fertilizer; second, we should change a small amount of fertilizer into sufficient peach fertilizer. Generally in the middle of August, the application of Zhongde brand 30mur8Mel 12 long-acting compound fertilizer per mu is not less than 15kg; third, foliar fertilizer should be supplemented, foliar spraying Shima brand "fruit king" (600x) + "beautiful fruit element" (5000 times); fourth, it is necessary to change the way of fertilization, from spreading after rain to opening ditches or shoveling holes, so as to improve fertilizer efficiency, prevent cotton from losing fertilizer in the later stage, and cause premature senility. Third, do not regard premature senility as precocious and correctly distinguish between precocious and premature senility of cotton, which is very important to cotton production. Misdiagnosing precocious senility as premature senility and increasing the amount of fertilizer application will lead to late ripening of cotton, increase investment and reduce income; misdiagnosing premature senility as precocious, loosening management will lead to reduction of cotton production and income. Therefore, cotton farmers should master the difference between early maturity and premature senescence of cotton. The cotton matured early, the cotton plant showed early development, the whole growth period was earlier, the budding and flowering was early, and the boll setting was early. The upper fruit branch of cotton plant can grow three fruit nodes, and the boll number and boll weight of the upper fruit branch are very different from those of the middle fruit branch. The upper leaves of cotton plants normally fall yellow, but there are no or less fallen leaves before all the bolls are opened. The upper fruit branches of the premature senile cotton plants could not stretch, only 1-2 fruit nodes grew, the bolls were less and smaller than the middle bolls, the upper leaves yellowed and fell off during boll opening, the upper half of some cotton plants withered, and there were no or a few peaches with top cover. Generally speaking, premature senility is easy to occur in early cotton fields and potassium deficient fields. In the early cotton field, the cotton plant budded early, the nutrition supply center was transferred to the bud and boll, the vegetative growth was inhibited and premature senescence occurred. Potassium deficiency in the field led to stem blight and withered the upper branches and leaves of the cotton plant. Therefore, it is necessary to re-apply peach fertilizer to the early cotton field. In cotton fields with the trend of premature senility in the later stage, once the symptoms of premature senility are found, Shima brand "Fruit King" (600 times) + "Yechui" (900 times) should be sprayed immediately, and nitrogen and potassium fertilizer should be applied quickly to stop the harm of premature senility in time. At the same time, we should immediately increase the application of peach fertilizer and strengthen fertilizer and water management to prevent cotton from being fattened in the later stage. Yantai Agricultural means of production Science and Technology Co., Ltd. Telephone: 0535-6857828 foliar fertilizer in the middle and later stage of cotton application technology most cotton farmers last topdressing time is generally in late July. At this time, cotton is the peak growing season, a large number of budding, flowering, bolls, from the harvest for more than 2 months, need a lot of nutrition supply. From July to September is the rainy season in North China, there are many Rain Water, cotton roots are in the state of water supersaturation for a long time, and even some cotton are often flooded and suffocated, and their roots grow poorly, resulting in poor nutrient absorption and supply of cotton, resulting in a large number of buds and bolls falling, leaves yellowing and premature senescence, a large number of red leaf stem blight and other physiological diseases. In order to solve the above physiological diseases in the middle and later stage of cotton, the scientific and rational application of foliar fertilizer is a very effective means. From July to August, due to the slow growth of cotton caused by Rain Water (unable to close ridges in time), the leaves turned yellow, which could lead to insufficient nutrition supply of cotton bolls and the phenomenon of falling buds and bolls. At this time, if the lion horse brand "Ye Cui" (diluted 900x) + "beautiful fruit" (6000 times) can be sprayed every 10 days, it can quickly make the leaves turn green, thus reducing the phenomenon of bud and boll drop. Second, when cotton is damaged by spraying "pesticides", "fungicides" or "hormones", spraying Shima brand "Ye Cui" 900 times can relieve the symptoms. Third, when cotton falls seriously in the flower and boll stage, spraying Shima brand "Huabao" (900 times) every 10 days can significantly reduce bud and boll shedding, increase peach yield and increase yield. If the combination of "Huabao" + "beautiful fruit element" + Aizengmei is used 3000 times, cotton pollination can be promoted and the anti-falling effect is better. Red leaf stem blight often occurs in cotton in April and August, which is a physiological disease caused by comprehensive nutritional deficiency mainly caused by potassium deficiency, which can cause a large number of fallen leaves. At this time, spraying Shima brand "fruit king" + "beautiful fruit element" (6000 times) for 2-3 times, once every 10 days, can not only control red leaf stem blight, but also promote cotton boll expansion, increase fiber length, and reduce the harm of Verticillium wilt. Click to get more cotton planting technology click to get more food crop planting technology