Fertilizer spraying helps increase cotton production
Foliar spray fertilizer is an auxiliary top-dressing measure. It is often used in the middle and late stages of cotton growth when the application of the top-dressing fertilizer is inconvenient. The commonly used fertilizers and methods of application in cotton fields are described as follows: 1. In the later stage of urea growth, if the cotton plants appear to be defertilized, 1 to 2% of the urea solution can be sprayed with 50 to 60 kilograms of leaf per acre to extend the leaves. Functional period, improve photosynthetic efficiency, prevent premature aging of cotton plants. 2. Superphosphate spraying calcium superphosphate solution can supplement the supply of phosphorus, which can promote the operation of organic nutrient in the cotton plant body, increase the boll weight, and improve cotton fiber quality. It is usually sprayed with 0.5 to 1% of superphosphate solution per acre of 50 to 60 kg. Pay attention to the preparation, the superphosphate should be soaked in water for 10-12 hours, and use the upper clear solution. 3, potassium dihydrogen phosphate flowering period with 300 ~ 500 times potassium dihydrogen phosphate solution foliar spray, can reduce the bell drop, increase the number of bolls per plant, at the same time, can also eliminate physiological diseases - red stem blight . 4. Borax Boron is an important trace element, which plays a significant role in the differentiation and development of cotton reproductive organs. The application of boron fertilizer not only reduced the shedding of the bolls, but also promoted the boll ripening and opening of the bolls and increased the pre-frost flower rate. The concentration of borax solution is 0.1 to 0.2%, that is, 50 to 100 grams of borax is used. After being dissolved in warm water, 50 kg of water is applied, and each spray of 40 to 50 kg per mu is used. China Agricultural Network Editor