Foliar fertilizer has the characteristics of quickly supplementing crop nutrients and improving fertilizer utilization. When the root fertilization of the crop cannot meet the needs in time, the foliar spray method can be used to quickly supplement the nutrients required by the crop. For example, in the late stage of crop growth, when the root activity declines and the ability to absorb fertilizer decreases; or when the crop growth process shows certain nutrient deficiencies; the soil environment is unfavorable for crop growth, and when the crop roots absorb nutrients, the foliage is sprayed. Fertilizer can play a role in supplementing nutrients.
1. Foliar fertilizer types There are many varieties of foliar fertilizers. There are two main categories: (1) nutrient dosage forms, mainly fertilizers, containing several or dozen different nutrients (nitrogen, phosphorus, potassium, trace elements) , amino acid, humic acid, etc.); (2) pure plant growth regulating dosage form; (3) nutrient-regulating mixed type, adding plant growth regulator to the fertilizer.
2. How to use foliar fertilizer Foliar fertilizer is a fertilizer for plant leaf absorption. Its use method is mainly foliar spray, and it can also be used for soaking seeds and roots.
3. Problems to be paid attention to when purchasing foliar fertilizers (1) Foliar fertilizer is only an auxiliary method for root fertilization, which cannot replace root fertilization. In particular, nitrogen, phosphorus, potassium, a large number of elemental fertilizers, mainly through root fertilization, soil supply. Therefore, the use of foliar fertilizer can not ignore the soil fertilization, only on the basis of soil fertility, can fully exert the effect of foliar fertilizer. At present, many foliar fertilizers have added plant growth regulators, which have the effect of promoting cell division and so on. This requires strengthening the management of fertilizer and water to ensure the needs of crops, so that the role of foliar fertilizer can be fully exerted.
(2) When purchasing foliar fertilizer, it should be purchased due to soil and crops. The different components of foliar fertilizer have different effects. Although the instructions all have the effect of increasing yield, the ingredients are different and the effects after use are different. For example, fertilizers containing amino acids have outstanding characteristics for improving crop quality; fertilizers containing fulvic acid have drought-resistance effects; in calcareous soils or alkaline soils, iron is insoluble ferric iron, which is difficult for plants to absorb, often suffering from Chlorosis deficiency; cultivation of fruit trees on red and yellow soil, often occurs some trace elements are insufficient, such as zinc deficiency, roots can be directly supplied with nutrients, avoiding nutrient adsorption or transformation by soil, and improving fertilizer effect. If the foliar fertilizer containing only trace elements or the trace elements applied on the crops that do not lack trace elements are not matched, it will not function properly and cause waste. Therefore, when purchasing foliar fertilizer, pay attention to its ingredients and purchase as needed.
(3) When purchasing foliar fertilizer, it is necessary to first check whether there is a registration certificate issued by the Ministry of Agriculture. All products that have obtained the registration certificate of the Ministry of Agriculture have undergone rigorous field tests and product inspections, and the quality is guaranteed.
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