Rational application of water-soluble fertilizer

A small amount of attention to balance a small number of times is the most important fertilization principle of water-soluble fertilizer, which accords with the characteristics of continuous absorption of nutrients by plant roots, and reduces the leaching loss caused by one-time large amount of fertilization. Water-soluble fertilizers are usually poured, drenched or applied through irrigation equipment. Especially under the condition of drip irrigation and fertilization, the root growth is dense and large, so the dependence on soil nutrient supply is reduced, and more depends on the nutrients provided by drip irrigation. There are higher requirements for the reasonable proportion and concentration of nutrients. If the formula is not balanced, it will affect the growth of crops. Reasonable irrigation to avoid excessive irrigation is generally enough to keep the depth of the root layer moist. The depth of the root layer varies greatly with different crops, so you can dig up the soil at any time to know the specific depth of the root layer. Excessive irrigation not only wastes water, but also seriously leaches nutrients below the root layer, wastes fertilizer and reduces crop production. In particular, urea and nitrate nitrogen fertilizer are easily lost with water. When combined with other fertilizers, water-soluble fertilizer is usually used only as topdressing. Do not use water-soluble fertilizer instead of other fertilizers, use them together to reduce costs and give full play to the advantages of all kinds of fertilizers. First of all, drip irrigation fertilization, drip water, and so on when the pipe is full of water to start fertilization. Immediately after the end of fertilization, drip clean water for 20-30 minutes, and discharge all the residual fertilizer liquid in the pipe. Secondly, long-term drip irrigation in greenhouse or greenhouse will cause salt accumulation on the surface and affect root growth. Drip irrigation under plastic film can be used to inhibit the transfer of salt to the surface. Third, pay attention to the uniformity of fertilization. In principle, the slower the drip irrigation, the better. Especially for the elements with poor mobility in the soil, prolonging the fertilization time can greatly improve the utilization rate of difficult-to-move nutrients.