The application method of irrigating with water is also called “fertilizingâ€, and it is generally a kind of top dressing that provides nutrients during the period of rapid growth of the crop. Since it is a supplementary fertilizer, it cannot replace basic fertilizers such as basal fertilization. However, because this method is convenient and fast, it is widely used in irrigated fields of vegetable fields and cash crops and special food crops. At present, the fertilization is mainly used in the vigorous season of growing vegetable crops, and is widely used in greenhouse cultivation and open field vegetables. Due to the rapid fertility of fertilized fertiliser, it is generally effective from 2 to 3 days to 3 to 5 days after rinsing. It is reflected in the changes in leaf color and plant height, which is in line with the enthusiasm of some growers. Therefore, fertilization has been used for many years. It has been widely adopted. Considering comprehensively the agricultural production targets with high yield, high quality, high quality, and environmental protection, and the lack of rural labor, the technical essentials for flushing and fertilizing are briefly described as follows: Choose fertilizer type Only water-soluble fertilizers can be applied with water. Urea, ammonia, ammonium sulfate and ammonium nitrate are commonly used in nitrogenous fertilizers; potassium and potassium sulfates are used in potassium fertilizers, and potassium nitrate can also be used. Even phosphorus-containing ammonium phosphate and diammonium phosphate do not need to be flushed. Because the phosphate fertilizer has poor mobility after being dissolved, it is easily fixed and cannot infiltrate into the root layer with water. The best application method of phosphate fertilizer can only be layered buried in the soil in order to improve its utilization. Quasi-fertilization Fertilizer application is better during the growing period of crops. For example, in fruit and vegetables, it can be applied after full fruit period and after picking fruits. In addition, if the cabbage is in the filling stage, the choice of temperature during the autumn planting will reduce the soil mineralization. The effect is reduced, and the vegetable crop is also suitable for application during the growing season. Control the amount of irrigation In the case of flood irrigation, flood irrigation is prevented, and when the canal is irrigated, the depth of the ditch is appropriate to the amount of water, so that nutrients dissolved in the water are prevented from being lost. Many farmers like to use this top-dressing method and it is effective to use it. However, in order to pursue the effect of the surface, regardless of the cost, one-sided use of large amounts of nitrogen fertilizer, misuse of fertilization, will lead to vegetables, longevity, quality, fertilizer use efficiency, loss of nitrogen, increase soil salinization. Some people break down granular high-concentration compound fertilizers and crush them; others use unprocessed and insoluble solid organic fertilizers or microbial preparations as fertilizers. These are not appropriate. In short, the following points must be mastered in principle: The mode of fertilization should be applied in a timely and appropriate manner, mainly for top dressing in intensive vegetable cultivation, and topdressing nitrogen and potassium. Second, there are four types of fertilizers that should not be used for flushing: one that does not flush phosphorus; two that do not flush granular composite fertilizers; three that do not flush solid organic fertilizers; and that do not crush microbial preparations or fertilizers. Greenhouse Plastic Plastic Clamps Greenhouse Plastic Plastic Clamps,Greenhouse Structure Connecting Clamps,Agricultural Greenhouses Clamps,Plastic Clamps JIANGSU SKYPLAN GREENHOUSE TECHNOLOGY CO.,LTD , https://www.engreenhouse.com