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首页> 外文期刊>Environmental Science and Pollution Research >Impacts of rapeseed dregs on Cd availability in contaminated acid soil and Cd translocation and accumulation in rice plants
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Impacts of rapeseed dregs on Cd availability in contaminated acid soil and Cd translocation and accumulation in rice plants

机译：油菜渣对受污染酸性土壤中镉有效性的影响以及水稻植株中镉的迁移和积累

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摘要

The objective of the present study was to investigate the effects of rapeseed dregs (RSD, a commonly organic fertilizer in rural China) at application rates of 0, 0.75, 1.5, and 3.0 % on Cd availability in soil and its accumulation in rice plants (Oryza sativa L., Xiangwanxian 12(#), and Weiyou 46(#)) by means of a pot experiment. The results showed that application of RSD resulted in a sharp decrease in the soil TCLP-extractable Cd content. However, the soil TCLP-extractable Cd content in amended soil gradually increased during the rice growing period. Application of RSD significantly increased Cd transport from root to shoot and the amount of Cd accumulated in the aerial part. RSD was an effective organic additive for increasing rice grain yield, but total Cd content in rice grain was also increased. At an application rate of 1.5-3.0 % RSD, the total Cd content in Weiyou 46(#) brown rice was 0.27-0.31 mg kg(-1), which exceeded the standard safe limit (0.2 mg kg(-1)) and was also higher than that of Xiangwanxian 12(#) (0.04-0.14 mg kg(-1)). Therefore, Weiyou 46(#) had a higher dietary risk than Xiangwanxian 12(#) with RSD application. We do not recommend planting Weiyou 46(#) and applying more than 0.75 % RSD in Cd-contaminated paddy fields.
机译：本研究的目的是研究0、0.75、1.5和3.0％的油菜籽渣（RSD，在中国农村是一种常见的有机肥料）对土壤中Cd的有效性及其在水稻中的累积的影响（通过盆栽试验，水稻（Oryza sativa L.），香万县12（＃）和微油46（＃））。结果表明，使用RSD可使土壤TCLP可提取的Cd含量急剧下降。然而，在水稻生育期，改良土壤中的TCLP可提取的Cd含量逐渐增加。施用RSD显着增加了Cd从根部到芽的​​转运，并增加了Cd在地上部分的积累量。 RSD是提高稻米产量的有效有机添加剂，但稻米中总Cd含量也增加了。在RSD为1.5-3.0％的情况下，维优46（＃）糙米中Cd的总含量为0.27-0.31 mg kg（-1），超过了标准安全限值（0.2 mg kg（-1））和也比向万县12（＃）（0.04-0.14 mg kg（-1））高。因此，使用RSD的威优46（＃）的饮食风险高于湘万县12（＃）。我们不建议在被Cd污染的稻田中种植Weiyou 46（＃）并施用超过0.75％RSD。

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