Diffractive Rear Mirror,Rear Mirror,Diffractive Optical Mirror,Near Flat Top Gaussian Beam Lambda Research Optics ChangChun,LTD. , https://www.lambdachina.com
Chinese cabbage fertilization technology
Rational fertilization can promote the growth of Chinese cabbage, increase the number of leaves and leaf area, thereby increasing the yield of Chinese cabbage, improving the quality of Chinese cabbage, improving the quality of Chinese cabbage, and mastering several points of rational fertilization: First, organic fertilizer, organic fertilizer and chemical fertilizer The combination is based on base fertilizer, combined with topdressing and topdressing; the third is topdressing with nitrogen fertilizer, nitrogen, phosphorus and potassium in reasonable coordination, and appropriate supplementation of trace elements; fourth, formula fertilization according to soil nutrient status and fertility; It is a suitable fertilization. Before planting, combined with land preparation, 25-30 kg of calcium phosphate per acre, 100 kg of grass ash as base fertilizer, seedling stage, because the root system of cabbage is still underdeveloped, the ability to absorb nutrients is weak, the amount of fertilizer needed is not large, can be chased appropriately Applying chemical fertilizers, generally 5-7.5 kilograms of urea per acre is applied. The growth and growth rate of cabbage in the rosette period is relatively large, and the absorption of nutrients is soared. 15-20 kg of urea can be applied per acre, or it can be applied. 1000 kg of high-quality organic fertilizer, appropriate addition of 50-100 kg of plant ash or 7-10 kg of fertilizer containing potassium. In the early stage of the ball, the rosette leaves and the outer leaves are vigorously growing at the same time, and the amount of fertilizer is required. Therefore, a large amount of topdressing should be applied in the first few days of the start of the baggage, and 3000-4000 kg of decomposed human excrement per acre, or 20 kg of urea. It can be used for ditching, or it can be applied to a single plant. In the middle and late varieties, the ball-forming period is longer, and 10-15 kg of urea should be applied in the middle of the ball. Spraying 0.5% urea on the foliar top dressing or spraying potassium dihydrogen phosphate solution can increase the number of leaves and increase the yield of cabbage.
ã€Comment】 ã€Print this article】 ã€Close this page】 ã€Large, medium and small】