Chinese cabbage 1. Fertilization problems and fertilization principles are serious for the blind application of nitrogen fertilizer in Chinese cabbage production. The amount of nitrogen fertilizer is too large, the ratio of nitrogen, phosphorus and potassium is unreasonable, the application of high-phosphorus compound fertilizer is blindly applied, and the application of organic fertilizer in some areas is insufficient. The problem of serious acidification of the soil, etc., proposes the following principles of fertilization: (1) Optimize the amount of NPK fertilizer according to soil fertility conditions and target yield; (2) Based on base fertilizer, combined with base fertilizer and topdressing. Topdressing is mainly based on nitrogen and potassium fertilizers, and appropriate supplementation of trace elements. After the rosette period, strengthen the management of topdressing, and increase the topdressing in the early stage of the package. It is not suitable to trace the nitrogen fertilizer 2 weeks before harvesting; (3) The effective boron in the northern calcareous soil and the effective molybdenum in the soil with large acidity in the south are low, and attention should be paid to the supplement of trace elements; (4) When the acidification of vegetables is serious, an appropriate amount of acidic soil conditioner such as lime should be applied; (5) Avoid using organic fertilizer that is not fully decomposed, and advocate the application of commercial organic fertilizer and fertile farmyard manure to fertilize soil. 2. Fertilization advice (1) Application rate of organic fertilizer: The production level is 4500~6000 kg/mu, and the organic fertilizer is 4 square meters/mu; the production level is 3500~5000 kg/mu, and the organic fertilizer is 3~4 square meters/mu. (2) The production level is 4500~6000 kg/mu: nitrogen fertilizer (N) 10~13 kg/mu, phosphate fertilizer (P2O5) 4~6 kg/mu, potash fertilizer (K2O) 13~17 kg/mu. (3) The production level is 3500~4500 kg/mu: nitrogen fertilizer (N) 8~10 kg/mu, phosphate fertilizer (P2O5) 3~4 kg/mu, potash fertilizer (K2O) 10~13 kg/mu. For plots that are prone to trace element boron deficiency, or plots that have been shown to have boron deficiency symptoms in previous years, 1 kg of borax may be applied per acre before planting, or 0.1% to 0.5% of borax or boric acid may be used in the middle and late growth stages. The aqueous solution is sprayed on the foliar surface (may also be mixed with pesticides), sprayed once every 5 to 6 days, and sprayed 2 to 3 times; Chinese cabbage is a calcium-loving crop. In addition to the calcium-containing fertilizer (superphosphate), it can also be applied by foliar supplementation with 0.3% to 0.5% calcium chloride or calcium nitrate. When the soil pH of the southern vegetable field is less than 5, 100-150 kg of quicklime is required per acre to reduce soil acidity and calcium supplementation. All organic fertilizers and phosphate fertilizers were applied as base fertilizers, 30% of nitrogen fertilizers were used as base fertilizers, and 70% were applied in combination with irrigation in the rosette stage and the pre-balloon stage for 2 times. Pay attention to the application of potassium fertilizer in the early stage of the core, accounting for the total application. About 50% of potassium. This article URL: Guilin Guiding Opinions on Chinese Cabbage in Autumn and Winter 2015 Shower Gel,Shower Cream,Shower Foam,Body Shower Gel Wuxi Keni Daily Cosmetics Co.,Ltd , https://www.wxkenidaily.com