Fertilizer capable reducing cadmium content of rice

Abstract

A fertilizer capable of reducing the cadmium content of rice is prepared from chicken manure, rapeseed meal, rice chaff, bamboo powder, humic acid and a microbial agent. The chicken manure, the rapeseed meal, the rice chaff, the bamboo powder and humic acid raw powder are added into a heating and stirring machine according to proportions to be stirred evenly, then the microbial agent is added for carrying out two-end type fermentation, and the fertilizer is prepared after the raw materials are fully fermented and decomposed. The fertilizer can quickly enter soil in a large area to inhibit the effectiveness of cadmium ions, change the granular structure of the soil and improve the adsorption capability of the soil, so that the overall quality of the rice soil is improved, and the cadmium content of planted rice is reduced.

Description

technical field [0001] The invention relates to the technical field of crop cultivation, in particular to a fertilizer for reducing cadmium content in rice. Background technique [0002] As a toxic heavy metal, cadmium is increasingly polluting crops. When cadmium enters the crops and is absorbed by the human body, it mainly combines with sulfhydryl-containing low-molecular-weight plasma proteins to form metallothioproteins, which are selectively stored in the liver, Kidney, spleen, pancreas, thyroid, adrenal gland, and testis are highly accumulative. Long-term or excessive absorption of cadmium by the human body can lead to bone pain. At the same time, cadmium can also cause a series of chronic damage to the human body, such as high blood pressure, testicular damage, carcinogenicity, teratogenicity, anemia, osteoporosis, etc. [0003] It is generally believed that there are several reasons for the excessive content of heavy metal cadmium in rice planting: [0004] 1. Th...

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Problems solved by technology

[0006] 3. Improper rice planting patterns, such as excessive use of elemental phosphate fertilizers to increase soil cadmium content, excessive use of chemical fertilizers and pesticides cause soil acidification and enhance the activity of cadmium ions

[0007] At present, most of the existing cadmium reduction technologies have problems such as high cost, time-consuming, and slow results. For example, the traditional guest-soil method (replacing old soil with new soil) requires a lot of money, manpower and material resources, and the discharged polluted soil is difficult to deal with. ; while more advanced chemical and biological measures can reduce the cadmium content in the soil to a lower level, but the treatment process is relatively slow, and whether it can reduce the cadmium content of the edible part of the crop to an acceptable level still needs to be verified

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