Cold Shed watermelon is a high-efficiency and economic crop. In the provinces of Hengshui Yucheng, Shijiazhuang Xinle and Baoding Qingyuan, the planting area is larger in the Zhongnan Plain, and the yield of watermelon is high. The demand for fertilizer is also greater. If sufficient nutrient supply cannot be ensured, the maximum yield of watermelon cannot be achieved, and the economic benefits will be affected; if the application of fertilizer is not balanced, the output will be too much attention and the internal quality will be neglected. Because the taste is not good, the product will be difficult to be sold in the market. There is a phenomenon of selling hard or even bad markets. Therefore, the cold-shed watermelon to achieve high-quality, high-yield, high-efficiency, fertilizer should pay attention to, should be scientific fertilization, specifically, base fertilizer to achieve the following four points: First, organic fertilizer must be cooked. Cold Shed watermelon is often used in the production of early spring cold shed cultivation mode, the production environment is carried out in a closed environment, if the application of organic fertilizer is raw fertilizer, fertilizer with more pests and bacteria, it will hurt the fragile Watermelon roots, without added organic fertilizer, will be fermented and fermented in the soil, resulting in heat energy and injuring watermelon seedlings and roots. During the process of decomposing organic fertilizer, various harmful gases such as ammonia will be produced. Gases will be harmed and injure the watermelon seedlings. Therefore, the organic fertilizer used in the base fertilizer must be fully decomposed. The commonly used farmyard fertilizers include pig manure, chicken manure, sheep manure and other animal manure, and the application amount per mu is controlled at about 5 square meters. For example, the amount of peasant manure used is about 5,000 kilograms per mu. Second, balanced with fertilizer. Watermelon is a kind of hipotassium and phosphorus-like economic crops. The three-element N, P and K fertilizers must be reasonably proportioned. The application of chemical fertilizers at the base fertilizer accounts for about 70% of the total fertilizers (the topdressing fertilizer is mainly nitrogen and potassium fertilizers). . Fertilizers should be based on well-known brands of compound fertilizers with comprehensive nutrient and high absorption and utilization. The total content of nitrogen, phosphorus, and potassium fertilizers should be more than 45%, and potassium sulfate fertilizers should be the best. The amount of land per mu is 70 kg. Third, increase the biological bacteria fertilizer. In the old traditional planting areas, due to many years of heavy planting, soil compaction, high salinity, poor physicochemical properties of the soil, and low absorption and utilization of fertilizers by watermelons, such plots can easily induce watermelon pests and diseases, resulting in a decline in yield. Poor taste, increased investment in production costs, and reduced planting benefits. Therefore, especially for the cultivation of old areas with biological bacterial fertilizer, these beneficial bacteria can play a role in reducing soil compaction, improving the physical and chemical properties of soil, improving nutrient utilization of fertilizers, reducing pesticide residues, etc. It has the characteristics of low investment and high return rate. The use of large-brand, high-profile, high-activity biological bacteria fertilizer, generally about 2 kg per mu. Fourth, appropriate amount of supplemental fertilizer. Watermelon is more sensitive to trace fertilizer, once the soil is missing, there will be fewer female flowers, reduced rate of melon, melon-shaped, cracked melons easily, resulting in decreased yield, decline in the commercial performance of watermelon, directly affecting planting income. Frequently used in the production of cold shed watermelon fertilizer iron, boron, zinc, calcium, etc., can be combined with the bottom application and foliar spray method, the end of the application of the amount of compound fertilizer, can also be mixed, the total amount Each kilogram of land is 1 kilogram, enter the watermelon expansion period, spray foliar micro fertilizer plus 98% content of potassium dihydrogen phosphate foliar fertilizer, can play a dual effect of increasing production and improve the quality of watermelon, general spraying 2-3 times . Antigen Sars Poct Test,Sars-Cov-2 Antigen Test,Covid-19 Antigen Rapid Test,Covid-19 Igg Igm Antibody Test Wuxi BioHermes Bio & Medical Technology Co., Ltd. , https://www.biohermesglobal.com