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A regulator suitable for the safe production of rice in cadmium-polluted paddy fields

A technology of safe production and regulating agent, applied in the restoration of polluted soil, etc., can solve unrealistic, expensive and other problems, and achieve the effect of promoting early growth and rapid growth, and increasing rice yield

Inactive Publication Date: 2011-12-21
SHENYANG INST OF APPLIED ECOLOGY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

In view of the actual national conditions of our country, it is obviously unrealistic to stop farming in large areas of moderately and lightly polluted farmland and carry out long-term phytoremediation or other costly engineering repairs.

Method used

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  • A regulator suitable for the safe production of rice in cadmium-polluted paddy fields

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0012] Screening of regulators for safety production in paddy fields polluted by cadmium

[0013] 1. Experimental design

[0014] Based on the rice varieties in the Shenyang rice area, extensively collected rice varieties, using soil plot experiments, referring to the realization of cadmium pollution in paddy fields, prepared cadmium-contaminated soil by artificially adding cadmium, and using my country's agricultural industry standard pollution-free rice (NY 5115 -2008) based on the cadmium limit value, the enrichment characteristics of cadmium in each variety were determined, and the variety with relatively high cadmium content was found at the same time, that is, Liaoxing 17. Rice varieties with high accumulation of cadmium were used as test materials, and regulators of rice safety production were screened out by adding regulators of sepiolite, lime and calcium dihydrogen phosphate to the polluted soil.

[0015] Concrete steps: in spring, on the paddy field soil polluted by...

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Abstract

The invention relates to rice safety production technology in cadmium-polluted paddy fields, in particular to a regulator suitable for rice safety production in cadmium-polluted paddy fields. A mixture of sepiolite and lime or sepiolite and calcium dihydrogen phosphate was applied as a conditioner to the contaminated soil for growing rice. By applying the paddy field regulating preparation of the present invention, the rice varieties can realize normal growth of rice in paddy fields polluted with medium and low levels of cadmium, and the cadmium content in the rice meets the cadmium limit value of my country's agricultural industry standard pollution-free rice (NY 5115-2008).

Description

technical field [0001] The invention relates to rice safety production technology in cadmium-polluted paddy fields, in particular to a regulator suitable for rice safety production in cadmium-polluted paddy fields. Background technique [0002] The farmland soil distributed in the urban-rural fringe is facing more and more serious environmental problems. Among them, the pollution of heavy metals in the paddy field soil is also very serious, especially the industrial wastewater irrigated farmland. These heavy metals can easily enter the human body through the food chain, posing a great threat to human health (Document 1: Shi Rongguang, Zhao Yujie, Peng Shengwei, et al. Analysis of soil-crop cadmium content accumulation and health risks under different land use types[J] .Resource Science.2008,30(12):1904-1910.; Literature 2: Bai Lingyu, Zeng Xibai, Li Lianfang, etc. The impact and cause analysis of different agricultural utilization methods on the accumulation of heavy metals ...

Claims

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Application Information

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IPC IPC(8): B09C1/08
Inventor 魏树和詹杰牛荣成周启星
Owner SHENYANG INST OF APPLIED ECOLOGY - CHINESE ACAD OF SCI
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