Formula fertilization of cotton, also known as balanced fertilization of cotton, is based on the characteristics of cotton growth and fertilizer requirements, according to the local soil nutrient conditions and the requirements of the level of cotton production, apply different types and different amounts of fertilizer, so that the soil effective nutrients In equilibrium and meet the requirements of cotton fertilizer. Through years of research and agricultural extension departments' practical experience in agricultural scientific research units, the ratio of nitrogen, phosphorus, and potassium in cotton fields is generally 1:0.8:0.6. If zinc, boron, and other trace elements can be applied at the same time as required, the effect is even greater. good.
In order to facilitate the operations of cotton farmers, special fertilizer manufacturers in cotton production will optimize the configuration of the combination of nitrogen, phosphorus, potassium and trace elements according to the growth and development needs of cotton. As long as farmers rely on their own production requirements, scientific methods of fertilization and the amount of fertilizer can be achieved. The intended purpose. To target 100-125 kilograms of cotton (lint) per mu, the content of organic matter in the cotton fields should be 1%~1.2%, while the application of organic fertilizer should be 4000~5000kg, 15kg of pure nitrogen, 12kg of pure phosphorus, and 9kg of pure potassium. Together with 1.2 kg of zinc sulfate, borax 0.5 ~ 1 kg. If it is required to produce 75 kilograms of cotton (lint) per acre of cotton, the required organic matter in the cotton field shall be 0.8% to 1%, 7.5 kilograms of pure nitrogen, 6 kilograms of pure phosphorus, and 4.5 kilograms of pure potassium, plus zinc sulfate and borax 0.5 ~1 kg. In order to increase the effective utilization of fertilizers, fertilization methods in cotton fields need to pay attention to fertilization methods. Generally, it is required that organic matter, phosphorus and potassium fertilizers, trace elements, and 1/3 of nitrogen fertilizers be used as a base fertilizer in combination with site preparation for furrow application and the remaining 2/3 nitrogen fertilizers. In combination with watering, topdressing at the budding stage or early flowering stage of the cotton is performed.
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