1. Application of organic fertilizer to improve quality: The supply of early nutrients in carrots is mainly based on base fertilizer. The base fertilizer should be mainly pig, chicken, cattle, horse manure and human urine, 2000-2500 kg per mu. The applied organic fertilizer must be fully decomposed, otherwise it will easily lead to abnormal roots, affecting its yield and quality. 2. Combination of nitrogen, phosphorus and potassium: nitrogen can promote the growth of branches and leaves, and synthesize more nutrients; phosphorus is beneficial to nutrient operation and quality, and it has a great influence on the initial growth and development of carrots, but it is very effective for the expansion of fleshy roots. Micro, it is generally applied in the base fertilizer; potassium can promote the meristematic activities of the root formation layer, and the yield increase effect is obvious. Therefore, the three elements can be used together to achieve high yields. For every 1000 kg of carrots produced, it needs to absorb 2.4-4.3 kg of nitrogen, 0.7-1.7 kg of phosphorus and 5.7-11.7 kg of potassium, the ratio of which is 1:0.4:2.6. 1/2 of the required nitrogen fertilizer is applied as a base fertilizer, and the remaining 1/2 can be applied as a top dressing when the leaf growth period and the fleshy root diameter reach 0.6 cm; all the required phosphate fertilizer can be applied as a base fertilizer; Part of it is used as base fertilizer, and the rest is used for topdressing when the fleshy roots are swollen. 3, the application of micro-fertilizer: carrots absorb more calcium, calcium content will cause carrot sugar and carotene content decreased, calcium deficiency is easy to cause hollow disease; carrots do not absorb magnesium, the more magnesium content The more sugar and carotene content, the better the quality. The application of calcium magnesium phosphate fertilizer in the base fertilizer can be sprayed once in the seedling stage and the leaf growth stage respectively, and the 0.1%-0.25% boric acid solution or the borax solution is sprayed twice in the fleshy root expansion period. According to comprehensive data, each kilogram of carrots produced 3.2 kilograms of nitrogen, 1.3 kilograms of phosphorus and 5 kilograms of potassium. Carrots have a large amount of nitrogen and phosphorus absorption, followed by phosphorus, but nitrogen fertilizer should not be too much, otherwise it will easily cause the length of the meat to become thinner and reduce the yield. According to the fertility characteristics and fertilizer characteristics of carrots, the fertilization should follow the principle of base fertilizer and supplemented by topdressing. Generally, on the basis of applying the mature organic fertilizer, the application of Tianji brand potassium phosphate can be 25-30 kg per mu. . Disclaimer: Some articles on this website are transferred from the Internet. If legal rights of third parties are involved, please inform this website. phone Mdvr Accessories,Wireless Transmitter And Receiver Box,Wireless Video Transmitter And Receiver,Touch Screen Monitor Vsstech Co.,Ltd. , https://www.vsstechcctvsystem.com