Smart controlled-release fertilizer

Abstract

The invention provides a smart controlled-release fertilizer. The fertilizer consists of the following components by weight ratio: 0.5%-0.2% of improved net structural polyacrylamide, 0.5%-0.8% of macromolecular lignin and the balance of nitrogen, phosphorus, potassium and other fillers, wherein the other fillers contain clay and an anti-blocking agent. According to the smart controlled-release fertilizer provided by the invention, the improved net structural polyacrylamide and the macromolecular lignin are added, so that a soil granular structure is obviously improved, soil hardening and acidifying can be relieved, and the air permeability and water-holding capacity of the soil are improved; and the fertilizer has functions of soil loosening and water holding, and stimulates root system growth, a vigorous fertilizer absorbing capability of the soil is maintained, the fertilizer application amount can be reduced, and the production and income of crops can be increased through applying the fertilizer which accounts for 70%-80% of the usage of a conventional compound fertilizer in an agricultural production process, so that environmental pollution is reduced.

Description

technical field [0001] The invention relates to a fertilizer, in particular to an intelligent speed-controlling fertilizer. Background technique [0002] Over the past 60 years, China's agriculture has gone through a path of high input, high output, and high resource consumption. High output is accompanied by a huge consumption of agricultural chemical fertilizers. According to preliminary estimates, by 2030, with the increase of my country's population, in order to ensure national food security, the demand for fertilizers will increase to 68 million tons according to the existing fertilizer varieties and usage methods. [0003] Therefore, the quantitative development model and traditional habitual unscientific fertilization methods will face the following problems: 1. Soil problems: China's cultivated land soil compaction, acidification, destruction of microbial populations, secondary salinization, lack of effective medium and trace elements, Problems such as the decline of...

AI Technical Summary

Problems solved by technology

[0003] Therefore, the quantitative development model and traditional habitual unscientific fertilization methods will face the following problems: 1. Soil problems: China's cultivated land soil compaction, acidification, destruction of microbial populations, secondary salinization, lack of effective medium and trace elements, Problems such as the decline of soil organic matter content continue to worsen, affecting the healthy growth of crops, and the use of chemical fertilizers increases, but the crop output does not increase and the quality declines, affecting people's health; , nitrogen and other mineral resources, but my country is not rich in these resources. For example, China relies almost entirely on imports of sulfur used for fertilizer production; 3. Environmental problems: Extensive use of chemical fertilizers leads to eutrophication of inland freshwater lakes, and overgrowth of cyanobacteria and aquatic plants seriously affects the ecology of water systems To balance groundwater pollution, the country spends a huge amount of money on water pollution caused by agricultural pollution

However, the cost of coated fertilizers is too high at present, and it is difficult to meet the needs of Chinese agriculture

The Chinese Patent No. ZL200710022749.6 in the prior art discloses a low-cost environmental-friendly loss-controlling fertilizer, which discloses a composite loss-controlling fertilizer made of polyacrylamide material, but the polyacrylamide added in the invention patent is a linear polymer , the loss and release of fertilizers cannot be well controlled, and the polyacrylamide used cannot be decomposed in the soil. Long-term use will pollute the soil and cause the soil to be closed, which is not conducive to crop growth.