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When applying fertilizer in drip irrigation, should irrigation or fertilization be carried out first?

When applying liquid fertilizer by drip irrigation, firstly, the amount of fertilizer should be calculated according to the planting crops, the area of rotation irrigation area and the growth period, and the fertilizer should be poured into the fertilizer tank or fertilizer pool and diluted with water. The general fertilizer should not exceed 1 / 2 of the container, and should be used for standby after mixing evenly. After irrigation, drip clean water for 15 ~ 20 minutes to check whether the pipeline leaks, and then start pumping fertilizer solution for irrigation with water. Generally, a can of fertilizer is chased for about 20 minutes, and then the pipeline is cleaned with clean water for another 30 minutes to prevent the emitter from blocking.

Liquid fertilizer has a wide range of applications. Accordingly, there are many application methods and methods. In the well irrigation area, liquid fertilizer can be used for equipment fertilization. The effect of water and fertilizer integration can be achieved through sprinkler irrigation, drip irrigation and other water-saving agricultural facilities combined with fertilizer applicators. At the same time, it is not limited by terrain. As long as the irrigation system is reasonably designed, it can be used to directly transport fertilizer and water to crop roots, improve the utilization effect of water and fertilizer, increase production and efficiency, It can also realize automatic and semi-automatic management and save manpower. This is the best way to apply liquid fertilizer.

In canal irrigation areas, flushing application can be adopted. The fertilizer can be poured into the irrigation water in a certain proportion at the irrigation inlet. The operation is simple but the quantity is not accurate. In the process of fertilization, the liquid fertilizer should be poured into the irrigation water at a uniform speed according to the irrigation amount and irrigation time, and the dilution ratio of fertilizer should be mastered. Generally, it is recommended that the dilution ratio of liquid fertilizer is 1000 ~ 1500 times.

In arid areas, liquid fertilizer can be used as leaf fertilizer spraying. Spraying leaf fertilizer can provide nutrients for crops and be directly absorbed and utilized by the leaf surface. At the same time, foliar fertilizer can be flexibly matched with drought and stress resistance reagents and fertilizer synergists to improve crop stress resistance and nutrient absorption. However, pay attention to the fertilizer concentration during operation and spray it in strict accordance with the instructions. Excessive concentration will cause damage to the leaves. The spraying is generally diluted 500 ~ 800 times. If you want to use it well, nutrition should be matched

The principle of wooden bucket tells us that how much water the bucket can hold does not depend on the longest wooden board, but on the shortest one. The same is true for crop fertilization. It is not the nutrient elements with the highest nutrient content that determine crop yield, but the elements with relatively low content. The role of each nutrient element in crop growth cannot be replaced by other elements. Crops cannot grow healthily without any element.

For a long time, the three elements of nitrogen, phosphorus and potassium have been considered more in the process of crop fertilization, but little attention has been paid to medium and trace elements. They are basically supplied by the soil, year after year, so that the trace elements in the soil are hollowed out, which can no longer meet the needs of crop growth, and then crop growth will be affected. For example, when wheat is planted in zinc deficient areas, spraying 0.5kg foliar zinc fertilizer can increase the yield by nearly 40kg. At the same time, the content of zinc in wheat grains will be significantly improved and the product quality will be improved.