The Importance of Foliar Fertilizer
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The use of foliar fertilizer is mainly to add some micronutrient elements or growth regulators to the crop, which is the necessary to improve the crop yield and crop quality. In some special cases, such as the late stage of the field of reproductive growth is also an important period of production. Fruit and soil that lack of calcium, boron and other micronutrient elements,the root activity will decrease and the nutrient absorption capacity will be weak. Therefore,foliar fertilization is necessary.
The advantages of foliar fertilizer
Absorb easily
After fertilization, all kinds of nutrients are first adsorbed by the soil as
well as some fertilizers must have a transformation process. After the ion exchange and diffusion effect, the fertilizer is absorbed by the crop roots and then reach through the stem vascular to the leaf. The transport distance is long. Therefore, the use of foliar fertilization can promote a variety of nutrients be quickly absorbed by crop leaves, the fertilizer can directly get into the leaves and involved to the metabolism process of crop. Therefore, foliar fertilization speed and effect are faster than the effect of soil fertilization. According to the study, the fertilizer absorption speed of leaf is faster one time than the speed of root.
The effect is obvious
Foliar fertilization can make nutrients directly get into plant through leaves. In addition, the absorption speed of foliar fertilization is rapid so that the nutrients in the crop body can be increased in a short time which can solve the problem of fertilizer scarcity and promote the using of fertilizer. The foliar fertilization can effectively promote the progress of various physiological processes in the crop, significantly improve the photosynthesis intensity, improve the activity of the enzyme, promote the synthesis of organic matter, transformation and transportation which is conducive to the accumulation of dry matter, production and quality improvement.
Less consumption
Foliar fertilization is generally less used, 
especially for boron, manganese, molybdenum, iron and other trace element fertilizers. In order to meet the needs of crops, there always need lot of fertilizer for root growth. And foliar fertilizer need to be sprayed on the crop leaves, the dosage should be one or some tenth of soil fertilization.
High efficiency
The advantages of foliar fertilizer are: high yield, high utilization rate, the effect is remarkable and so on. Foliar fertilizer is the best choice for farmer.
Spraying foliar fertilizer need to pay attention to these factors
The effect of foliar fertilizer is short because the amount of foliar fertilizer is limited. The efficiency of leaf nutrition is related to leaf structure, and leaves have low permeability to mineral nutrient, especially leafy leaves such as olive, citrus and coffee.
Fertilizer drops are not easy to infiltrate into the leaves, the leaves of water drops fall from the surface will lead to fertilizer loss. If there is rain after the fertilization, the rain will scour the fertilizer. Windy and hot day also will bad for fertilizer spraying because hot day will dry the foliar fertilizer.
The correct method of spraying foliar fertilizer
The foliar fertilizer spraying should be uniform, meticulous, thoughtful. The spraying drop should be small and the spraying should be evenly, in particular, we should pay attention to spray on the upper leaves. The nutrient absorption rate of new leaves is rapid than the old leaves strong absorption capacity, especially peach, pear, persimmon, apple and other fruit trees. The positive
leaf cuticle is 3-4 times thick than the back, so we should pay attention to spray the back of the leaves so that promote the fertilizer absorption. So when we spray fertilizer, we should spray both sides ofthe leaves.
In the purchase of foliar fertilizer, we should choose the type has been marked with the function so that the purpose of fertilization and the function of foliar fertilizer should be consistent. Selecting the foliar fertilizer and mastering the application technology is the key to improve the crop yield, save the cost, improve the quality and protect the environment and also is the main way to balance the fertilizer.
The articke is translated from: http://www.fert.cn/news/2017/08/22/101323657173.shtml
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