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Modifying agent for rice safety production applicable to cadmium-polluted rice field

A technology of safe production and improver, applied in the fields of rice cultivation, application, organic fertilizer, etc., can solve the problems of unrealistic and high cost, and achieve the effect of promoting early growth and rapid growth and improving rice yield.

Inactive Publication Date: 2012-03-28
SHENYANG INST OF APPL ECOLOGY CHINESE ACAD OF SCI
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  • Abstract
  • Description
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  • Application Information

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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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  • Modifying agent for rice safety production applicable to cadmium-polluted rice field

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0012] Example Screening of cadmium-polluted paddy field safety production improver

[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, determine the enrichment characteristics of cadmium in each variety, and find out the varieties with higher relative content of cadmium at the same time. A rice variety with high accumulation of cadmium was used as the test material, that is, Liaoxing 17, and the rice safety production improver was screened out by adding fly ash and lime improver to the polluted soil.

[0015] Specific steps: On the paddy field soil polluted by cadmium in spring, evenly sprinkle the modifier with a...

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Abstract

The invention relates to the technology of rice safety production of a cadmium-polluted rice field, in particular to a modifying agent for rice safety production applicable to a cadmium-polluted rice field. Lime and / or fly ash, as the modifying agent, is applied to polluted soil for growing rice. By applying the modifying agent for therice field, the rice variety realizes that the rice grows normally in intermediate-level and low-level cadmium-polluted rice fields, and the cadmium content in the rice accords with the cadmium limiting value of the pollution free rice of the agricultural industry criteria (NY 5115-2008).

Description

technical field [0001] The invention relates to rice safety production technology in cadmium-polluted paddy fields, in particular to an improver suitable for safe production of rice 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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Patent Type & Authority Applications(China)
IPC IPC(8): C09K17/06C09K17/04A01G16/00C09K101/00A01G22/22
Inventor 魏树和牛荣成周启星
Owner SHENYANG INST OF APPL ECOLOGY CHINESE ACAD OF SCI
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