The main role of foliar fertilizer is to make up for the lack of soil fertilization, prevent premature plant failure, and promote crop nutrient balance. The correct use of foliar fertilizer can increase crop yield, improve crop quality and enhance crop resistance. In order to improve the application effect of foliar fertilizer, the following points should be taken into account when using:
First, choose good quality foliar fertilizer. When choosing to purchase foliar fertilizer, pay attention to the trademark, enterprise standard number, product quality certification, agricultural use registration certificate, plant name, site, and date of production of the package, whether the packaging is intact, and liquid fertilizer should pay attention to the solubility With or without precipitation.
Second, we must be targeted. Generally speaking, in the case of insufficient basal fertilizer, leaf fertilizers mainly composed of nitrogen and phosphorus fertilizers should be used. When sufficient base fertilizers are used, the use of trace element-based foliar fertilizers can be selected, and growth can be selected according to the different needs of the crops. Regulates the foliage of the material. For example, cotton is sprayed with boron fertilizer at budding stage to prevent falling buds from falling and increase fiber length and lint content; applying zinc fertilizer to rice and corn can prevent and cure rice blast seedlings and corn white seedling disease; peanuts and soybeans planted in acidic soils in the south. Spraying molybdenum fertilizer can increase oil content and protein content; application of brassinolide can make vegetables ripe for market in advance, reduce cellulose content, improve taste and increase sugar content.
Third, spray concentration to adapt. Spraying foliar fertilizer must strictly control the spraying concentration, especially for foliar fertilizers containing growth regulators. For example, triacontanol at a concentration of 0.5 ppm to 1 ppm can promote seed germination, but a concentration of more than 1 ppm can inhibit seed germination. Therefore, it is necessary to spray in strict accordance with the requirements of various foliar fertilizer application instructions.
Fourth, choose the best spraying time and location. In order to facilitate the absorption of nutrients by crops, it is best to choose the spraying time in the early morning or early evening with little wind power. If heavy rain falls after spraying, spray it again. If it is a small area spray, it can be sprayed on the back of the leaf because the back of the leaf absorbs nutrients faster than the surface.
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