College of Agriculture, Guizhou University, Guiyang, 550025, China.
Institute of Soil and Water Resources and Environmental Science, College of Environmental and Resource Sciences, Zhejiang Provincial Key Laboratory of Agricultural Resources and Environment, Zhejiang University, Hangzhou, 310058, China.
Bull Environ Contam Toxicol. 2022 Jan;108(1):158-166. doi: 10.1007/s00128-021-03317-1. Epub 2021 Aug 18.
Organic matter plays an important role in controlling arsenic(As) release and transformation in soil, however, little is known about the effect of manure application on As behavior in soils with different As contents. In this study, waterlogged incubations using various As-contaminated paddy soils with manure amendment were conducted to investigate how manure application influence As mobilization and methylation in different paddy soils. The results indicated that manure application increased As release in paddy soils with high As (> 30 mg kg) contents. Moreover, our findings also showed that manure application increased the relative abundance of arsM-harboring Euryacheota and Planctomycetes at the phylum level and arsM-harbouring Methanocellaceae, Anaerolinea and Bellinea at genus level, thereby promoting As methylation. These results provide important insights for the significant variation in As mobilization and methylation in paddy soils amended with manure. Moreover, our results suggest that serious consideration should be given to the manure application in As-contaminated paddy soil.
有机物质在控制土壤中砷（As）的释放和转化方面起着重要作用，但对于施用有机肥如何影响不同砷含量土壤中砷的行为知之甚少。本研究采用淹水培养的方式，用不同砷污染的稻田土壤进行有机肥添加，以研究有机肥施用如何影响不同稻田土壤中砷的迁移和甲基化。结果表明，有机肥的施用增加了高砷（>30mgkg）含量稻田土壤中砷的释放。此外，我们的研究结果还表明，有机肥的施用增加了 ArsM 基因丰度较高的真核生物和浮霉菌门的相对丰度，以及 ArsM 基因丰度较高的产甲烷菌科、拟杆菌门和贝氏菌门的相对丰度，从而促进了砷的甲基化。这些结果为有机肥施用引起的稻田土壤中砷的迁移和甲基化的显著变化提供了重要的见解。此外，我们的研究结果表明，在砷污染的稻田土壤中施用有机肥时应慎重考虑。
