Special biochar slow release base fertilizer for potatoes and preparation method thereof

Abstract

The present invention provides a special biochar slow release base fertilizer for potatoes. The base fertilizer includes a core layer and coating layer coated on the surface of the core layer. The core layer is prepared by mixing the following raw materials by weight: 10-20 parts of molasses, 40-50 parts of biochar, 8-10 parts of eggshell powder, 40-50 parts of triple superphosphate, 20-30 parts of potassium chloride, 5-10 parts of urea, 8-15 parts of ammonium sulfate, 2-3 parts of zinc sulfate, 2-4 parts of magnesium sulfate, 1-3 parts of boric acid, and 0.3-0.5 part of a fertilizer additive; the weight of the core layer is 50%-60% of the total weight of the slow release fertilizer; the coating layer is a mixture of biochar and a binder, and the weight of the coating layer is 40%-50% of the total weight of the slow release fertilizer. The slow release of nutrients in the fertilizer is controlled, one-time fertilization can meet the demand on fertilizer of the crop throughout the growing season, so as to reduce fertilizer usage; and the special biochar slow release base fertilizer effectively prevents pollution of the fertilizer to the environment, improves the soil, increases the potato production, and enhances the quality of potatoes.

Description

technical field [0001] The invention relates to the field of agricultural fertilizers, in particular to a special biochar slow-release potato base fertilizer and a preparation method thereof. Background technique [0002] Fertilizers are the material guarantee for the sustainable development of agriculture and the material basis for increasing grain production. In the 1980s, the application of chemical fertilizers contributed about 46.3% to the increase in grain production in my country, and the application of fertilizers greatly promoted the production of grain in my country. According to statistics, from 1996 to 2009, the use of chemical fertilizers in my country increased by 41.2%, while the total grain output only increased by 5.1%. The increasing input of chemical fertilizers did not continue to increase the grain output. An important reason for this phenomenon is that the reduction in the utilization rate of chemical fertilizers leads to a decline in the effect of incr...

AI Technical Summary

Problems solved by technology

In the 1980s, the application of chemical fertilizers contributed about 46.3% to the increase in grain production in my country. The application of fertilizers greatly promoted the production of grain in my country. However, in the 1990s, while the input of chemical fertilizers increased linearly, the grain output According to statistics, from 1996 to 2009, the use of chemical fertilizers in my country increased by 41.2%, while the total grain output only increased by 5.1%. The increasing input of chemical fertilizers did not continue to increase grain output.

Although there is no big gap with the world in terms of traditional chemical fertilizer varieties, the utilization rate of chemical fertilizers is low, especially nitrogen fertilizer, which is 30% lower than the international level, causing economic losses of tens of billions of yuan and serious environmental pollution every year.

The current chemical fertilizer market is mainly dominated by fully soluble, instant, and quick-dispersion fertilizers, which intensifies the waste and loss of fertilizers

Commonly used quick-acting fertilizers have a short period of action. In production, topdressing must be done several times to meet the nutrient requirements of crops throughout the growth period. This not only takes a lot of labor and increases the cost of fertilization, but also causes a large loss of surface fertilizer during topdressing, which is significantly reduced. Fertilizer effect, it is difficult to exert the yield increasing effect of fertilizer

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