A method for reducing cadmium content in brown rice
A technology of rice and content, applied in rice cultivation and other directions, can solve the problems affecting the growth and development of rice, harm to human health, etc., and achieve the effect of good control effect, reduction of Cd content, and enhanced effect of cadmium reduction.
Active Publication Date: 2019-09-20
YONKER ENVIRONMENTAL PROTECTION
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Problems solved by technology
Once the farmland soil is polluted by Cd, Cd is easily absorbed by rice roots and enters the plant, which not only affects the growth and development of rice, but also accumulates in brown rice through the food chain, causing serious harm to human health.
Method used
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Embodiment
[0029] Example Experimental Design:
[0030] On the same piece of paddy field soil, set 5 treatments, each treatment set 3 repetitions, and the area of each experimental sample square is 25m 2 (5m×5m), a total of 15 plots, all sample plots are randomly arranged in blocks.
[0031] The specific operation and management of each treatment in this embodiment includes the following steps. When the same piece of paddy field soil was harvested last season, the whole amount of rice straw was uniformly recovered, pulverized with a pulverizer or a ball mill, and obtained by passing through a 1mm sieve is the product used in the present invention. biochar. Biochar and calcium-magnesium-phosphorus fertilizers were evenly spread on the soil surface 7 days before rice planting, and thoroughly mixed with the surface 20cm of soil by plowing. After 3 days, the base fertilizer was applied and flooded until the rice seedlings were transplanted. The application amount of material charcoal is ...
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The invention discloses a method for reducing the content of cadmium in brown rice. The method includes the following steps that firstly, biomass charcoal and calcium magnesium phosphate fertilizer are evenly mixed according to the weight ratio of (4-12):1 and are evenly scattered on the surface of soil according to the total amount of 600-1000 kg / hm<2> 7-14 days before transplanting of rice seedlings, tillage is conducted, base fertilizer is applied three days later, and flooding is conducted until the rice seedlings are transplanted; secondly, the rice seedlings are transplanted, when the rice seedlings grow to the booting stage and the filling stage, and lime water is applied in the booting stage and the filling stage respectively, wherein the time interval between two times of lime water application is 15-20 days, the lime content in the lime water applied each time is 150-325 kg / hm<2>, and the mass concentration of the lime water is 8-15%. The method can effectively reduce the content of Cd in brown rice, can provide various nutrients for rice, and can also increase the yield of rice.
Description
technical field [0001] The invention relates to a method for reducing cadmium content in brown rice, and belongs to the technical field of prevention and control of heavy metal pollution of agricultural products. Background technique [0002] Cd is a non-essential element for the human body and plants, and one of the most toxic heavy metal elements. At the same time, Cd is also recognized as the main heavy metal pollution element in rice fields. With the acceleration of industrial development and urbanization, the random discharge of industrial "three wastes" and urban domestic sewage, as well as the unreasonable use of pesticides and fertilizers containing heavy metal Cd, the release of Cd in the environment has been intensified, and Cd in the soil The continuous increase of accumulation will cause ecological and environmental problems such as the decline of soil productivity, the pollution of agricultural products and the destruction of the ecological environment. Accordi...
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IPC IPC(8): A01G22/22
Inventor 贺前锋朱维刘代欢李学钊卜雪婷熊殷俊
Owner YONKER ENVIRONMENTAL PROTECTION