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 not only enhances crop resistance, but also improves crop quality and yield. To effectively improve the use of foliar fertilizer, the following points should be taken into account when using it: First, choose a good quality foliar fertilizer. When choosing to purchase foliar fertilizer, pay attention to whether the trademark, enterprise standard number, product quality certification, agricultural use registration certificate, plant name, site, and production date on the packaging bag are complete, the packaging is in good condition, and the liquid fertilizer must pay attention to solubility. How, with or without precipitation. Second, spraying foliar fertilizer should be targeted. It is generally believed that in the case of insufficient basal fertilizer, leaf fertilizers dominated by nitrogen and phosphorus fertilizers can be used; when sufficient basal fertilizers are used, the use of trace element-based foliar fertilizers can be selected, and growth can be selected according to the needs of the crops. Regulates the foliage of the material. For example, spraying boron fertilizer during the budding stage can prevent falling bells and increase fiber length; applying zinc to rice and corn can prevent the growth of rice seedlings and corn white seedlings; spraying peanuts and soybeans containing molybdenum fertilizer in the southern acidic soil. The oil content and protein content can be increased; the application of brassin can make vegetables mature in advance, reduce the cellulose content, improve the taste and increase the sugar content. Third, foliar fertilizer spraying concentration should be appropriate. Spraying foliar fertilizer must strictly control the spraying concentration, especially for foliar fertilizers containing growth regulators. For example, triacontanol at a concentration of 0.5-1 ml/l can promote seed germination, but concentrations above 1 ml/l can inhibit seed germination. Therefore, it is necessary to spray in strict accordance with the concentration required by the instruction manual of various foliar fertilizers. Fourth, grasp the best spraying time and spray site. In order to facilitate the absorption of nutrients by crops, spraying time is best selected in the early morning or late evening when the wind is not strong. After spraying foliar fertilizer in case of heavy rain within 24 hours, it should be sprayed once more. If it is a small area spray can be sprayed on the back of the leaf, because the back of the leaf absorbs nutrients faster than the leaf surface. Author: Xin Feng
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