Special controlled-release fertilizer for single-cropping hybrid rice and preparation method thereof

Abstract

The invention discloses a special controlled-release fertilizer for single-cropping hybrid rice, which is composed of the following components in parts by weight: 100-150 parts of common urea, 200-300 parts of 1-methylene-2-urea, 50-100 parts of 2-methylene-3-urea, 150-250 parts of monoammonium phosphate, 300-400 parts of potassium chloride, 1-2 parts of zinc sulfate monohydrate, 10-50 parts of bamboo charcoal and 10-50 parts of sodium humate. On the premise of producing the high-concentration compound fertilizer, the effect of synchronous fertilizer nutrient release and hybrid rice fertilizer demand is achieved according to the law that the nitrogen demand in the hybrid rice later period accounts for a quarter of total nitrogen by using the principles of quick effect taking of urea (7 days), 1-methylene-2-urea (40-80 days) and 2-methylene-3-urea (80-120 days), staircase release of nitrogen and chelation adsorption actions of sodium humate and nano charcoal on secondary and minor elements. The invention also discloses a preparation method of the special controlled-release fertilizer for single-cropping hybrid rice.

Description

technical field [0001] The invention relates to agricultural fertilizers, in particular to a special fertilizer for slow and controlled release of single-season hybrid rice, and also relates to a preparation method of the special fertilizer for slow and controlled release of single-season hybrid rice. Background technique [0002] The promotion and planting of hybrid rice has solved China's food security problem. Super hybrid rice has continuously refreshed the rice yield record and made important contributions to the tenth consecutive increase in my country's total grain output. However, due to non-execution of formula fertilization, the production potential of hybrid rice cannot be reached, resulting in a reduction in production due to unmatched good varieties and good methods in some areas. Today, the area of ​​single-crop hybrid rice in the middle and lower reaches of the Yangtze River is expanding year by year, and labor resources are increasingly scarce. Hybrid rice re...

AI Technical Summary

Problems solved by technology

There are three deficiencies in the published invention patents for special fertilizers for hybrid rice: First, there are too many organic fertilizers and fillers, resulting in low nitrogen, phosphorus and potassium content, which may easily cause farmers to apply the customary amount to the field, resulting in later defertilization and reduced production Second, most of them use organic or inorganic coating slow-release technology, and it is difficult to synchronize the release of fertilizer nutrients with the demand of hybrid rice; Third, some invention patents add everything regardless of whether it is needed, which actually causes waste of nutrients and increases the cost of fertilization for farmers

For example, the application number 201210267637.8 is a special fertilizer for single-season rice. In addition to the raw materials of nutrients, more than 10 other substances are added, which may have a certain impact on the nutritional content; another example is the name of the invention patent CN102153419B - a special fertilizer for rice, organic and other inorganic substances Accounting for 80%, it is only suitable for application in rice areas lacking organic fertilizers

Another example is the invention patent CN101792355B titled Synchronous Slow-release Super Hybrid Rice Special Fertilizer and its preparation method. The process is complicated, and all of them use coated slow-release technology. Long-term application will cause soil structure to deteriorate, which is not conducive to soil fertility cultivation.

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