The main role of foliar fertilization is to compensate for soil fertilization, prevent premature senescence, and promote crop nutrient balance. Proper use of foliar fertilizer can increase crop yield, improve crop quality and enhance crop stress tolerance. In order to improve the use of foliar fertilizer, the following points should be noted when using.
First, we must choose good quality foliar fertilizer
When purchasing foliar fertilizer, pay attention to the trademark, enterprise standard number, product quality certificate, agricultural use registration certificate, factory name, factory address, production date, packaging, whether the packaging is intact, liquid fertilizer should pay attention to the solubility. With or without precipitation.
Second, to be targeted
It is generally believed that in the case of insufficient base fertilizer, foliar fertilizer mainly based on nitrogen and phosphorus fertilizer can be selected; when sufficient application of base fertilizer is applied, foliar fertilizer mainly based on trace elements should be selected, and growth can also be selected according to different needs of crops. Adjust the foliar fertilizer of the substance. For example, when cotton is sprayed with boron fertilizer in the bud stage, it can prevent falling buds and increase the length of fiber and the content of clothing. The application of zinc in rice and corn can prevent rice seedlings and corn white seedling disease; peanuts and soybeans planted in acid soil in the south. Application of molybdenum-containing fertilizer can increase oil content and protein content; application of brassinolide can make vegetables mature in advance, reduce cellulose content, improve taste and increase sugar content.
Third, the spray concentration should be appropriate
Spraying foliar fertilizer must strictly control the spray concentration, especially for foliar fertilizers containing growth regulating substances. For example, tridecyl alcohol with a concentration of 0.5 to 1 microgram can promote seed germination, but the concentration of more than 1 microgram will inhibit the seed germination. Therefore, it is necessary to carry out the spraying in strict accordance with the concentration required by the instructions for use of various foliar fertilizers.
Fourth, choose the best spraying time and location
In order to facilitate the absorption of nutrients by crops, the spraying time is best selected in the early morning or evening when the wind is not strong. In case of heavy rain after spraying foliar fertilizer, spray it again. If sprayed in a small area, it can be sprayed on the back of the leaf because the back of the leaf absorbs nutrients faster than the leaf surface.
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