How to use foliar fertilizer

In addition to relying mainly on the root system to absorb the nutrients needed from the soil, the foliar surface can also absorb nutrients. Foliar fertilization is mainly used to help crops supplement some medium and micronutrient elements or growth regulators, which is also very important to improve crop yield and quality. Under special circumstances, such as the late reproductive growth stage of field crops, the aboveground parts such as fruits lack medium and micronutrient elements such as calcium and boron, and when the root activity decreases and the nutrient absorption capacity weakens, it needs to be supplemented by leaf fertilization; or when there is no irrigation in the high temperature and dry season, the transport of available nutrients in the rhizosphere soil is not smooth. Or in the waterlogged waterlogged land, crop roots lack oxygen, resulting in crops can not absorb normally, the method of foliar fertilization should be adopted. Therefore, the main problems solved by foliar fertilization are: one is the supply of medium and trace elements; the other is to alleviate the difficulty that the root system can not absorb nutrients temporarily. The absorption of leaves is faster than that of roots, and nutrients can be quickly provided to plants. It has the following advantages: fast direct supply of nutrients, avoiding the fixation and degradation of nutrients in the soil, and the nutrient use efficiency is higher than that of soil fertilization. Its disadvantage is that the fertilizer effect is short and limited. It is a kind of auxiliary fertilization method. Skills of foliar fertilization 1. selection of fertilizer composition: foliar fertilization is mainly the supply of trace elements, and the combination of trace elements is beneficial to the absorption and utilization of nutrients. To determine the variety of fertilizer, first, it depends on the needs of crops; second, it depends on the limited types of nutrients in the soil. 2. The concentration of leaf fertilizer should be determined: if the concentration is too high, it will hurt the leaves, and if the concentration is too low, it will not work. 3. The time and climatic conditions of fertilizer spraying should be selected: for example, to avoid spraying fertilizer before rain; the key period of nutrition efficiency should be selected during the growth period. The frequency of spraying fertilizer usually needs to be sprayed more than 2 times to be effective.