At the moment when cotton enters the booming season, there is a high demand for fertilizer, temperature and moisture. According to the experiences of many places of research, experts have provided technical guidance for cotton farmers.
Scientific application of potassium to promote cotton growth
According to the survey, a considerable part of cotton farmers still lacks an accurate understanding of the use of potash fertilizers, and there is widespread shortage of potash fertilizers in cotton fields. Some cotton farmers do not know what the role of potash; Some believe that as long as the application of compound fertilizer or organic fertilizer contains potassium, it can meet the growth needs of cotton; there is a high price of potash, which will increase the cost of planting.
The application of potash fertilizer can balance the proportion of N, P and K in the soil, increase the life activity of cotton, increase the number of peaches per plant, significantly increase the weight of single bolls, accelerate the boll opening and improve the fiber quality, and can increase the production of 25 kg of seed cotton per acre. It can also increase the resilience to fusarium wilt.
High-yielding cotton fields generally apply 30 kg of potassium chloride or potassium sulfate fertilizer per acre, and divide the base fertilizer and top dressing twice. It should be noted that high potassium fertilizers must be applied to meet the requirements of cotton for insect resistance and yield increase. If potassium oxide is used at a content of 60%, the content of pure potassium in 30 kg of potassium fertilizer is 18 kg; and for the same dose, 45% of NPK fertilizer is applied, the content of pure potassium is only 7.5 kg, and the organic fertilizer is pure. The content of potassium is lower. At present, the price of potash fertilizer in the market has fallen more than in previous years, and the input and output ratio of potash fertilizer application is cost-effective.
One-time application of too much potassium will have an antagonistic effect on other elements and affect the absorption of other fertilizers by cotton. If potassium fertilizer is not applied in the base fertilizer, it should be applied in time at the budding stage and flowering stage of cotton. Potassium application outside the root is generally performed after a large amount of cotton bolls. Although potassium fertilizers can be used to supplement small amounts of potassium, the application of potash fertilizers should be based on ditching or deep-seated treatment, which may cause loss and volatilization.
Pu Shi Tao Fei related to high yield and quality
The amount of peach on cotton was positively correlated with the yield. In other words, the grasp of peach fertilizer is related to the high yield of cotton. Applying peach fertilizer can increase the boll weight, increase the percentage of clothes, and improve the fiber quality.
Why can peach fertilizer promote high yield and quality of cotton? First, the period of bell-ringing is the second peak of carbon content in cotton plants. The increase of soluble sugar, the decrease of nitrogen content, the largest proportion of carbon and nitrogen, and the largest amount of nutrients are needed. Therefore, the cotton cannot be hungry on cotton. Second, after the cotton begins to boll, the nutrient transport direction in the body is no longer transported to the main stalk. Instead, it is input to the cotton boll. The cotton plant body has a bearing capacity, and the application of the peach fertilizer does not cause madness. The third is the application of the peach fertilizer. After the 11th layer of cotton plants, the fruiting rate of the regenerated fruit twigs above the fruiting branches often exceeds 50%, which is more than 10% higher than that of the cotton plants without applying the peach fertilizer or applying the peach fertilizer. Fourth, the efficiency of putting fertilizer before sitting on the peach is required. After sitting on peaches, the fertilizer is low. For example, if you invest 1 yuan of fertilizer before sitting in peach, you can increase the income by 2 to 3 yuan, and you can increase the income of fertilizer by 4 to 5 yuan after you invest 1 yuan in peach.
This year, because many fertilizers have been consumed in the early stage of cotton production, especially in some disaster-stricken areas, fertilizers must be added in a timely manner and the technical points of application must be strictly observed. From the point of view of application technology, four aspects can be adjusted. The first is to make up the Peach Fertilizer Peach fertilizer; the second is to change the application of less than enough, generally 15 to 20 kg of urea per mus, potassium fertilizer shortage of potassium fertilizer field 8 to 10 kg; third is to change the appendage For acupuncture and planting, it is necessary to cultivate roots and protect the roots. Fourthly, when drought occurs, it is necessary to divert irrigation water, grab fertilize and fertilize, and adhere to the water to adjust soil moisture, adjust fertilizer with water, and adjust water with water to create good cotton yields. Ecological conditions. Only the application of peach fertilizer and application of peach fertilizer can make the cotton “tender in August†and “Laojian in September†and “harvest in Octoberâ€.
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