What are the advantages of foliar fertilizer? A comprehensive analysis of the benefits of using it
What are the advantages of foliar fertilizer? We also ask knowledgeable readers to help explain. With the rapid development of agriculture, foliar fertilizer has gradually been accepted by farmer friends. Zhongdi Web has compiled the advantages of foliar fertilizer, and they are listed in detail below for readers to refer to. The main advantages of foliar fertilizer: Advantage one, foliar fertilizer has high fertilizer efficiency...
What are the advantages of foliar fertilizer? We also ask knowledgeable readers to help explainWith the rapid development of agriculture, foliar fertilizer has gradually been accepted by farmer friends. Zhongdi Web has compiled the advantages of foliar fertilizer, and they are listed in detail below for readers to refer to.
The main advantages of foliar fertilizer:
Advantage one, foliar fertilizer has high fertilizer efficiency
In general, after applying nitrogen, phosphorus and potassium chemical fertilizers, they are often fixed or leached due to factors such as soil acidity, soil moisture content and soil microorganisms, which reduces fertilizer efficiency. Foliar feeding can avoid this phenomenon and improve fertilizer efficiency. Foliar fertilizer is sprayed directly on the leaf surface without contacting the soil, avoiding the adverse factors brought by soil adsorption and leaching, so its utilization rate is relatively high and the total amount of fertilizer can be reduced.
Moreover, foliar feeding has a relatively high utilization rate and also stimulates root absorption. Under the condition of maintaining the same yield, multiple foliar sprays can save 25% of soil-applied nitrogen, phosphorus and potassium fertilizers.
Advantage two, foliar fertilizer saves time and labor
If foliar fertilizer is mixed with pesticides for a single spray, it can not only save operating costs, but also improve the efficacy of certain pesticides. Tests have shown that the inorganic and organic nitrogen compounds in foliar fertilizer promote the absorption and translocation of pesticides; surfactants can improve the spreadability of fertilizer and pesticide on the leaf surface and extend the absorption time of easily soluble nutrients; the pH value of foliar fertilizer can produce a buffering effect and increase the absorption rate of certain pesticides.
Advantage three, foliar fertilizer acts quickly
Foliar fertilizer acts faster than root fertilizer, and foliar feeding can promptly and rapidly improve the plant's nutritional status. Generally speaking, foliar feeding is faster than root absorption. For example, when a 1-2% urea aqueous solution is sprayed on the leaves, measurements show that 1/3 can be absorbed after 24 hours; when a 2% superphosphate extract is sprayed, after 5 minutes it can be transported to all parts of the plant. From this it can be seen that foliar feeding can supplement the nutrients the plant needs in a short time and ensure normal plant growth.
Advantage four, foliar fertilizer causes low pollution
Nitrate is one of the substances that cause cancer. Due to unscientific and excessive application of nitrogen fertilizer, nitrate is promoted to persist and accumulate in surface water systems and vegetable crops, which has attracted increasing attention. Of the nitrate ingested by people, 75% comes from vegetable crops. Therefore, using foliar feeding in vegetable cultivation can not only reduce soil-applied nitrogen fertilizer and maintain the established yield, but also produce vegetables with reduced pollution.
Advantage five, foliar fertilizer is highly targeted
Supplement whatever the crop lacks? During plant growth and development, if a certain element is lacking, its deficiency symptoms will quickly be reflected on the leaf surface. For example, when a crop lacks nitrogen, the seedlings often turn yellow; when it lacks phosphorus, the seedlings turn red; when it lacks potassium, plant development is delayed, the leaf color is dark green, and finally orange-red chlorotic spots appear. Based on the deficiency characteristics of crop leaves, the missing elements can be sprayed in time to supplement them and improve the symptoms.
Advantage six, foliar fertilizer can supplement the insufficiency of nutrient absorption by the roots
At the seedling stage of plants, the root system is not well developed and its absorption capacity is weak, so yellow and weak seedlings are likely to appear. In the later stage of plant growth, root function declines and the ability to absorb nutrients is poor. Therefore, foliar feeding can increase yield. Especially for fruit trees and vegetable crops, the effect of foliar feeding is relatively obvious.
However, the concentration and single application amount of foliar fertilizer are both limited, and it cannot be sprayed in large amounts, especially for major nutrient elements and secondary nutrient elements, so it can be used for trace elements that require smaller amounts.
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