Fertilizer suitable for rice and preparation method and application of fertilizer

Abstract

The invention relates to a fertilizer suitable for rice and a preparation method and application of the fertilizer. The fertilizer comprises a leaf surface spraying agent and a soil conditioner, wherein the leaf surface spraying agent comprises 200-230 parts of silicon dioxide, 60-80 parts of potassium nitrate, 8-15 parts of calcium nitrate, 2-3 parts of selenium, 2 or less parts of added elements, 1-2 parts of a plant growth regulator, 0.1 or less part of a bacteriostat and 1,000 parts of water; and the soil conditioner comprises 60-100 parts of potassium-rich rock, 30-50 parts of quick lime,150-300 parts of a sugar alcohol solution, 3-4 parts of urine, 4-5 parts of diammonium phosphate, 0.5-1.5 parts of microelements, 30-50 parts of livestock feces, 20-40 parts of crop straw, 10-30 parts of humic acid, 0.5-1.5 parts of biological bacteria and 0.1 or less part of a bactericide. According to the fertilizer, cadmium is effectively reduced through both the leaf surface spraying agent and the soil conditioner.

Description

technical field [0001] This patent application belongs to the technical field of agricultural fertilizers, especially rice fertilizers. More specifically, it relates to a fertilizer suitable for reducing cadmium pollution of brown rice, its preparation method and use. Background technique [0002] As known in the industry, cadmium is a heavy metal element that forms inorganic compounds with chemical elements such as oxygen, chlorine, and sulfur, and is distributed in nature. With the rapid development of modern industry, the pollution caused by industrial "three wastes" has become more and more serious, which has brought cadmium pollution to farmland rice. high content) also directly pollutes the soil. According to the results of soil sampling survey conducted in Shaoguan City, Guangdong Province in 2007, the rate of heavy metals exceeding the standard in Shaoguan City was 22.77%, among which cadmium exceeded the standard by 30 times; the average soil cadmium content in Cha...

AI Technical Summary

Problems solved by technology

[0006] Due to the strong mobility of cadmium ions, the existing fertilizers have a single and insignificant effect of reducing cadmium, and cannot form a two-pronged effect. There is no technical reference for the development of fertilizers exclusively for rice. Therefore, it is necessary to develop a more efficient fertilizer. Cadmium-reducing fertilizers to meet production requirements