摘要
通过向土壤中添加As(Ⅲ)和DMA培养试验,研究了土壤砷化学价态以及有效性变化的问题。结果表明,加入土壤中的As(Ⅲ)和DMA在120 d后全部转变为As(V),土壤有效态砷含量也呈减少趋势。pH、有机质及铁铝锰氧化物是影响As(Ⅲ)在土壤中转化过程的主要因素,而DMA在土壤中的转化只受铁铝锰氧化物的影响。
An incubation test was conducted to study the transformation process of exogenous As(Ⅲ) and DMA in soil,and the changes of chemical valence and availability of arsenic in the process were analyzed. The results indicated that the exogenous As(Ⅲ) and DMA were totally transformed into As( V) after 120 days aging. With the increase of incubation time,the content of available arsenic in soil decreased.Soil pH,organic matter and Fe,Al and Mn oxides are the main factors affecting the transformation of As(Ⅲ),while Fe,Al and Mn oxides are the main factors affecting the conversion of DMA.
作者
高雪
刘国一
谭海运
侯亚红
任清
GAO Xue;LIU Guo-yi;TAN Hai-yun;HOU Ya-hong;REN Qing(State Key Laboratory of Barley and Yak Germplasm Resources and Genetic Improvement/Institute of Agricultural Resources and Environment,Tibet Academy of Agricultural and Animal Husbandry Science,Tibet Lhasa 850000,China;Integrated Agriculture and Animal Husbandry Service Center,Tibet Lazi 858100,China)
出处
《西藏农业科技》
2019年第4期10-12,共3页
Tibet Journal of Agricultural Sciences
基金
西藏自治区自然科学基金项目“外源砷在土壤中的形态转化及对青稞生物有效性研究”(XZ2017ZRG-43)。
