Method for inhibiting rice from absorbing arsenic and cadmium by using gypsum composite

A compound and gypsum technology, applied in the field of soil remediation, can solve the problems of high cost of physical remediation methods, inapplicability of large-area polluted soil, and affecting large-area rice planting, etc., to achieve stable effect, easy access, and good growth

Inactive Publication Date: 2019-01-25
RES INST OF ZHEJIANG UNIV TAIZHOU +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the cost of physical remediation is high, and it is not suitable for the remediation of large-scale contaminated soil, and the more economical phytoremediation method also faces problems such as remediation plants are difficult to handle or affect large-scale rice planting.

Method used

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  • Method for inhibiting rice from absorbing arsenic and cadmium by using gypsum composite
  • Method for inhibiting rice from absorbing arsenic and cadmium by using gypsum composite
  • Method for inhibiting rice from absorbing arsenic and cadmium by using gypsum composite

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Embodiment

[0027] The method of utilizing gypsum compound of the present invention to inhibit rice from absorbing arsenic and cadmium comprises the following steps:

[0028] 1) The first season of rice: First, add 0.15% of gypsum compound (G1F1) and 0.30% of Gypsum composite (G2F2), after fully mixing it with paddy soil, add an equal amount of deionized water to each treatment until the soil is flooded by about 3cm, and after 48 hours of stability, transplant rice seedlings Xiushui 03 (a variety with low accumulation of arsenic and cadmium ), the rice was flooded with water about 3cm before the rice was filled, no base fertilizer was added before rice planting, 0.16g / kg of urea and 0.08g / kg of potassium dihydrogen phosphate were applied to the tillering fertilizer, and 0.12g / kg of urea and 0.08g / kg of potassium dihydrogen phosphate were applied to the booting fertilizer. Potassium hydrogen 0.06g / kg. At the same time, the treatment without gypsum compound is set as the control group (CK)...

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Abstract

The invention discloses a method for inhibiting rice from absorbing arsenic and cadmium by utilizing a gypsum composite, which comprises the following steps of: before rice is transplanted, the gypsumcomposite is applied to paddy field soil polluted by the arsenic and the cadmium, and the gypsum composite and the paddy field soil are fully and uniformly mixed; before rice filling, the flooding depth of paddy soil is kept at 2-4 centimeters; after the rice is filled, the surface layer of the paddy field soil is kept moist, and no flooded water layer exists. The gypsum composite has stable effect of inhibiting the rice from absorbing arsenic and cadmium, is easy to obtain, is economical and practical, and can continuously act on the rice for at least two growth seasons.

Description

technical field [0001] The invention relates to a method for inhibiting rice from absorbing arsenic and cadmium by using a gypsum compound, and belongs to the technical field of soil restoration. Background technique [0002] In recent years, with the acceleration of industrialization and urbanization, the extensive use of arsenic and cadmium-containing chemicals and the discharge of arsenic and cadmium-containing wastewater from metallurgical and chemical industries have led to a large amount of arsenic and cadmium accumulation in the soil. Typical heavy metal pollutants. For example, the discharge of wastewater from an arsenic product factory in Hunan has caused serious arsenic pollution in farmland soil. The soil arsenic content in heavily polluted areas is 7.7-255mg / kg, with an average value of 97.1mg / kg, which is much higher than the limit value of arsenic in farmland soil; Lechang, Guangdong Province The surrounding area of ​​the lead-zinc mine was irrigated with mini...

Claims

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Application Information

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IPC IPC(8): A01G22/22A01G7/06C05G1/00
CPCA01G7/06A01G22/22C05D3/02C05D9/02
Inventor 赵文亮邱伟迪翟伟伟陈敏唐先进
Owner RES INST OF ZHEJIANG UNIV TAIZHOU
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