Slow-release water-retention fertilizer and preparing method thereof

Abstract

The invention discloses a slow-release water-retention fertilizer and a preparing method thereof. The slow-release water-retention fertilizer is prepared from, by weight, 8-10% of calcium lignosulphonate, 3-5% of polyacrylamide, 3-5% of potassium humate, 10-15% of molasses powder, 3-5% of zinc sulfate heptahydrate and borax and 45-70% of nitrogen phosphorus and potassium inorganic nutrient. Fertilizer nutrients can be fast diffused close to fertilization points to ensure long-term absorption of root system distribution and achieve the optimal use effect; the water absorbing component can serve as a soil water-retaining agent, continuously keeps water from loss, continuously provides sufficient water for crop root systems and determines dissolution and absorption of the fertilizer. The slow-release water-retention fertilizer is manufactured into a nail shape, which is beneficial for inserting the whole fertilizer strip into the deep part of the soil, it is avoided that more labor is needed for ditching and fertilizing, the slow-release capacity of the fertilizer can be greatly improved, long-term action of the fertilizer is kept, the fertilizer is good in forming performance and convenient to carry, and loss is reduced.

Description

Technical field [0001] The present invention belongs to the technical field of fertilizers. More specifically, the present invention relates to a slow-release water-retaining fertilizer suitable for fruit trees, landscape trees and economic forests and a preparation method thereof. Background technique [0002] The current fertilization of fruit trees, forest trees and landscape trees has the following problems: [0003] 1. If the method of fertilization is applied, the fertilizer will be leached and volatilized seriously, and the nutrient utilization rate will be low; it is easy to cause the surface salt (nutrient) content to be too high, and the roots of the trees cannot be deeply pierced because of the fertility. Weeds compete for nutrients; [0004] 2. If trenching and burying are adopted, the work efficiency is low, and the labor cost is very high, especially in the mountains, it is more time-consuming and laborious; [0005] 3. The existing fertilizer varieties have a certain d...

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Problems solved by technology

[0003] 1. If the fertilization method is applied by spreading, the leaching and volatilization of the fertilizer will be serious, and the nutrient utilization rate will be low; it will easily cause the surface salt (nutrient) content to be too high, and the root system of the tree will not be able to penetrate deeply due to the fertilization, so it is prone to premature aging and death, and the surface is prone to growth Weeds compete for nutrients;

[0004] 2. If trench digging is used for burial, the work efficiency will be low and the labor cost will be high, especially in mountainous areas, which will be more time-consuming and labor-intensive;

[0005] 3. Existing types of fertilizers are somewhat one-sided: high-concentration compound fertilizers lose nutrients quickly and do not last long enough; organic fertilizers lack quick-acting properties and require a large amount of fertilization, and the contents of trace elements in the above two types of fertilizers are seriously insufficient;

[0006] 4. Existing fertilizers do not have water-retaining performance or have poor water-retaining performance. Using water-retaining agents alone not only increases labor, but also costs a lot

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