Decreasing Effects of Different Sources of Organic material on Cadmium Accumulation in Rice
Received date: 2021-11-06
Online published: 2022-03-17
A pot experiment was conducted to study the effects of adding alfalfa and vermicompost on the physical and chemical properties of soil and the accumulation of cadmium in rice during the growth of rice. The results showed that, the soil Eh value decreased significantly with the addition of organic matter, with the more by alfalfa than by vermicompost under the same organic matter addition level. The soil pH of the alfalfa treatment group was lower than that of the vermicompost treatment group in the early stage of rice growth, and there was no significant difference between the two treatment after the heading stage. The addition of external organic materials could transform the highly active cadmium to the low active cadmium in the soil. Compared with the control without adding exogenous organic materials, the cadmium content in each part of the rice treated with exogenous organic materials was significantly reduced. Moreover, the cadmium content in each part of the rice plant in the alfalfa treatment group was significantly lower than that in the vermicompost treatment group under the same organic matter addition level.
Key words： rice; soil; Cd; organic matter
ZHU Jing, SUN Xingxing, ZHANG Xiaoxu, TAO Runping, ZHANG Jiawei, XU Yiqun . Decreasing Effects of Different Sources of Organic material on Cadmium Accumulation in Rice[J]. China Rice, 2022 , 28(2) : 73 -76 . DOI: 10.3969/j.issn.1006-8082.2022.02.015
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