A multilayer slow release functional fertilizer and a preparing method thereof

Abstract

A multilayer slow release fertilizer is disclosed. NPK components are enveloped by using an enveloping agent and are adopted as an inner layer structure. An outer layer is prepared by covering with a mixture of fermented organic materials and smashed quartz stone granules. The fermented organic materials contain a plurality of organic acids to be supplied for direct absorption for plants. Using of chemical components is reduced. When the fertilizer enters the surface of soil, firstly, the mixed quartz stone granules can destroy hardened soil, makes the soil loose and soft so as to allow components to enter, and plays a role of improving the soil; the fermented organic materials are absorbed by roots along with water streams so as to expose the inner enveloping structure; and the special enveloping agent is slowly dissolved along with time to release inner chemical components, thus avoiding nutrient loss and plant root cell water loss due to overhigh salinity. The chemical components and the organic materials are reasonably divided in labor and cooperated, supplement each other and bring out the best in each other.

Description

technical field [0001] The invention relates to a multilayer slow-release functional fertilizer and a preparation method thereof, belonging to the field of multilayer slow-release fertilizers in fertilizers. Background technique [0002] Chemical fertilizer is the largest material input in agricultural production. According to the statistics of the Food and Agriculture Organization of the United Nations, chemical fertilizers account for 40-60% of the increase in yield. However, the production time shows that due to the nature of the fertilizer itself and the soil Due to the impact of environmental conditions and agricultural measures, the utilization rate of chemical fertilizers is very low. The waste of nutrient resources caused by the low utilization rate of fertilizer nutrients in China is astonishing. According to statistics, the annual production and application of nitrogen fertilizer in China is about 20 million tons, and the seasonal utilization rate of fertilizers is...

AI Technical Summary

Problems solved by technology

[0002] Chemical fertilizer is the largest material input in agricultural production. According to the statistics of the Food and Agriculture Organization of the United Nations, chemical fertilizers account for 40-60% of the increase in yield. However, the production time shows that due to the nature of the fertilizer itself and the soil The impact of environmental conditions and agricultural measures, etc., the utilization rate of chemical fertilizers is very low