Rice field irrigation method for reducing content of cadmium in rice

A content and irrigation technology, applied in the fields of botanical equipment and methods, rice cultivation, horticulture, etc., can solve the problems of shortened lifespan, renal dysfunction, and increased mortality.

Active Publication Date: 2013-01-16
溧阳常大技术转移中心有限公司
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Problems solved by technology

According to Japanese research, long-term consumption of rice with high Cd content will cause human kidney dysfunction, resulting in increased mortality and shortened life span

Method used

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  • Rice field irrigation method for reducing content of cadmium in rice
  • Rice field irrigation method for reducing content of cadmium in rice
  • Rice field irrigation method for reducing content of cadmium in rice

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Embodiment Construction

[0022] Select soils with Cd concentrations of 5 mg / kg and 10 mg / kg, plant japonica rice and indica rice in each soil, and irrigate according to six different methods. The Cd content in the obtained rice is as follows: Figure 1-4 As shown, rice yield is shown in Table 1.

[0023] Table 1 Comparison of rice yield under different irrigation methods (unit: g / pot)

[0024]

[0025] Slight water control from the tillering stage to the heading stage, and keeping the water layer at 5-10 cm in other stages can greatly reduce the Cd concentration of rice, but it will not have a significant impact on rice yield. Compared with the flood irrigation during the whole growth period commonly used in the actual production of rice, the Cd content of rice decreased by 22.2%-53.8%, and compared with the commonly used water control 10-15 days before maturity in the actual production of rice, the Cd content of rice decreased by 53.1% -61.5%. In rice field heavy metal Cd medium and lightly pollu...

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Abstract

The invention relates to a rice field irrigation method for reducing the content of cadmium in rice. The method comprises the steps of controlling water at tillering stage and heading stage of rice, irrigating in a waterflooding manner at other stages, and keeping the water layer being 5-10 cm. By strictly controlling the water control period and water control degree of the rice field, the rice field irrigation method can effectively reduce the content of cadmium in rice without affecting the rice yield.

Description

technical field [0001] The invention relates to a technology for preventing and controlling heavy metal pollution of agricultural products, in particular to a paddy field irrigation method for reducing cadmium content in rice. Background technique [0002] Since the 1950s, with the substantial increase in population, the rapid development of industries such as mining, smelting and manufacturing, the extensive use of agricultural chemicals and the discharge of urban sewage and sewage, resulting in the harmful effects of Cd, Pb, Hg, Cu, etc. The rapid and excessive accumulation of biologically toxic metal elements in the environment has aroused widespread concern about the environmental pollution caused by human activities. Most of these metal elements are summarized together and are called "heavy metals". "element. Among the various heavy metal elements, cadmium (Cd) is one of the most concerned elements, because Cd is easily absorbed by plants and is often enriched in the h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01G16/00A01G22/22
Inventor 刘建国钟晓梅王明新孙向武
Owner 溧阳常大技术转移中心有限公司
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