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Cotton fertilizer points
Cotton is divided into five growth stages: seedling stage, seedling stage, bud stage, flower boll stage, and boll opening stage. Cotton is a deep root crop, long growth period, large amount of growth, the soil fertility requirements, the principle of fertilization is: Shizujifei, light to mention Miaofei, stable Shilei fertilizer, re-application of flower bell fertilizer, Shi cover fertilizer. In accordance with the "nitrogen, phosphorus, potassium, with micro" method of fertilization. 1. Apply 3,000 to 5,000 kilograms of organic fertilizer for basal allelopathic fertilizer, together with all phosphate fertilizers, most potash fertilizers, and some nitrogenous fertilizers. For zinc-deficient and boron-deficient land, 1-2 kg of zinc sulphate and 0.5-1 kg of borax can be applied in conjunction with organic manure application. 2. Steady planting seedling fertilizer is generally no longer top-dressing fertilizer, budding period as the cotton field grows, can consider urea 15-20 kg. 3, re-application of flowers and bolls with fertilizer-based nitrogen, appropriate phosphorus, potassium, Mushi black and white bio-fertilizer 25-30 kg, ditch strip application or acupuncture points, and timely cover soil. 4. Apply top dressing fertilizer According to the growing trend of cotton, make up the application of autumn peach fertilizer and mainly use foliar spray to add stamina to increase the weight of single bell. Mu topdressing urea 5-10 kg. Can also be used 0.3% of potassium dihydrogen phosphate and 1% urea mixed solution spray, spray 3 to 4 times, each time interval 7-10 days, to prevent premature aging.