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Agricultural and chemical regulation method capable of reducing arsenic absorption of rice

A chemical regulation, rice technology, applied in chemical instruments and methods, botanical equipment and methods, rice cultivation, etc., can solve the problems of limiting the effect of foliar application, resistance and control, and achieve planting density, reduce absorption, guarantee The effect of yield and quality safety

Inactive Publication Date: 2017-12-08
INST OF ENVIRONMENT & SUSTAINABLE DEV IN AGRI CHINESE ACADEMY OF AGRI SCI
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Problems solved by technology

The cuticle and wax on the surface of rice leaves can largely prevent the attachment of liquid fertilizer sprayed on rice leaves, thus greatly limiting the effect of foliar application

Method used

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  • Agricultural and chemical regulation method capable of reducing arsenic absorption of rice
  • Agricultural and chemical regulation method capable of reducing arsenic absorption of rice
  • Agricultural and chemical regulation method capable of reducing arsenic absorption of rice

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach

[0042] The implementation mode of this test example is as follows:

[0043] Test site: Arsenic-polluted area in Shimen, Hunan.

[0044] Test period: April to July 2016.

[0045] Test soil: The total arsenic content in the paddy field is 66.33 mg / kg (about twice the national soil environmental quality standard).

[0046] Experimental treatment: set four experimental treatments with a width above the ridge of 40 cm, a width below the ridge of 50 cm, and a height of 10, 20, 30, and 40 cm. In addition, two levels of ferrihydrite application and no ferrihydrite application were designed.

[0047] Control treatment: corresponding rice was planted under the ridge as a control.

[0048] Experimental rice variety: early rice Xiangzao 143.

[0049] Test method: The rice is first subjected to conventional seedling raising treatment, and after the ridge treatment is completed, the seedlings are transplanted on the ridge. Application of ferrihydrite treatment Apply 2.0 g of ferrihydri...

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Abstract

The invention relates to an agricultural and chemical regulation method capable of reducing the arsenic absorption of rice. The method comprises the steps that rice transplanting soil is ditched and ridged, wherein the cross section of ridges is in an isosceles trapezoid shape; before rice transplanting, 2-3 rows of pits used for transplanting rice seedlings are dug in the rice transplanting soil on the ridges, 1.5-2.5 g of ferrihydrite is applied to each pit and mixed uniformly, and then rice seedlings are transplanted. The paddy field soil is ridged for rice planting, the arsenic absorption of the rice is remarkably reduced, and the rice yield is not influenced; then the ferrihydrite is applied to the ridges so that the arsenic absorption of the rice can be reduced to a greater extent, and the yield and quality safety of agricultural products are guaranteed.

Description

【Technical field】 [0001] The invention belongs to the technical field of agricultural planting. More specifically, the present invention relates to an agrochemical regulation method for reducing arsenic uptake by rice. 【Background technique】 [0002] Arsenic is a toxic and carcinogenic metalloid element that exists widely in nature. Its pollution not only seriously affects the quality of agricultural products, but also seriously threatens human health. Therefore, arsenic pollution is also a very serious environmental problem facing the world. Rice is a very important food crop and has strong sensitivity to arsenic. The main reason is that arsenic in farmland soil under flooding conditions mainly exists in the form of reduced arsenite, which is mobile. Strong, highly toxic, and relatively difficult to be adsorbed by the soil solid phase, thus increasing the activity of arsenic in the soil solution to a large extent, and finally making rice absorb more arsenic than other crop...

Claims

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Application Information

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IPC IPC(8): A01G16/00A01C21/00C09K17/04C09K101/00A01G22/22
CPCA01C21/00A01G22/22C09K17/04C09K2101/00
Inventor 曾希柏苏世鸣白玲玉王亚男
Owner INST OF ENVIRONMENT & SUSTAINABLE DEV IN AGRI CHINESE ACADEMY OF AGRI SCI
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