Preparation method of special compound organic sustained-release fertilizer for potatoes

Abstract

The invention discloses a preparation method of a special compound organic sustained-release fertilizer for potatoes, and relates to the technical field of sustained-release fertilizers. The preparation method of the special compound organic sustained-release fertilizer for the potatoes comprises the following steps: activating biomass char, performing modification preparation on chitosan, and preparing a sustained-release fertilizer. A compound produced by performing esterification and polymerization on citric acid and polyaspartic acid is utilized, so that fertilization efficiency of the compound sustained-release fertilizer can be improved with certain inhibition effects on pests and pathogens achieved. The special compound organic sustained-release fertilizer disclosed by the inventionintegrates an organic fertilizer, an inorganic fertilizer and a microbial fertilizer, so that, nutrients needed for potato growth, including nitrogen, phosphorus, potassium and the like, are providedin a balanced way; and thus, the fertilizer is comprehensive in nutrients, and combines long-term and short-term fertilization effects.

Description

Technical field: [0001] The invention relates to the technical field of slow-release fertilizers, in particular to a method for preparing a special compound organic slow-release fertilizer for potatoes. Background technique: [0002] my country is a large agricultural country. With the continuous development of agricultural technology, agricultural production depends more and more on chemical fertilizers. At present, the amount of chemical fertilizers used in my country ranks first in the world, and it shows a trend of increasing year by year. However, traditional chemical fertilizers face two major problems in the process of agricultural production and use: one is the large amount of chemical fertilizers used, and the utilization rate is low. The utilization rate of nitrogen fertilizer in the current season in my country is 30-35%, the utilization rate of phosphorus fertilizer is 10-25%, and the utilization rate of potassium fertilizer is 35%. -50%; Second, the use of chemic...

AI Technical Summary

Problems solved by technology

However, traditional chemical fertilizers face two major problems in the process of agricultural production and use: one is the large amount of chemical fertilizers used, and the utilization rate is low. The utilization rate of nitrogen fertilizer in the current season in my country is 30-35%, the utilization rate of phosphorus fertilizer is 10-25%, and the utilization rate of potassium fertilizer is 35%. -50%; Second, the use of chemical fertilizers is unreasonable. At present, the use of quick-acting fertilizers in my country is still dominated by batches of quick-acting fertilizers, with low utilization rates, short fertilizer effect cycles, high costs, and environmental pollution.

In agricultural production, partial application of nitrogen fertilizer or partial application of potassium fertilizer has a great impact on potato yield, especially partial application of nitrogen fertilizer often leads to a large reduction in yield

[0005] In my country, due to the long-term use of chemical fertilizers for many years, the shortage of organic fertilizers and the imbalance of various nutrients have caused the ecological environment of farmland, soil physical and chemical properties and soil microbial flora to be damaged to varying degrees, which has affected the safety of agricultural products to a certain extent.