Effects of soil moisture on available arsenic and alkaline phosphatase activity in paddy soil
XIE Wei1,2, TAN Xiang-ping1, TIAN Hai-xia1, WANG Zi-quan1, YANG Rui1, WEI Ge-hong3, HE Wen-xiang1,2
1. College of Resources and Environment, Northwest A & F University, Yangling 712100, China;
2. Key Laboratory of Plant Nutrition and the Agri-environment in Northwest China, Ministry of Agriculture, Yangling 712100, China;
3. College of Life Sciences, Northwest A & F University, Yangling 712100, China
The relationship of available arsenic and soil alkaline phosphatase activity at different soil moistures (35%, 65% and 110% of water holding capacity) was studied by an indoor simulated experiment. The results showed that available arsenic content increased after arsenic pollution and declined with aging until held steady after 15days. Flooding reduced the available arsenic content and soil alkaline phosphatase activity. The relationship of soil enzymatic activities (U) and arsenic concentration (C) was described well by the model U=A/(1+B×C), which indicated that soil alkaline phosphatase activity could be a good predictor for arsenic pollution in paddy soil under different soil moistures. Ecological dose 10% (ED10) of total and available arsenic were 67mg/kg and 11mg/kg in paddy soil, respectively. The results of this study suggested that it was an efficient way to appropriately change the soil moisture to relieve the toxicity of arsenic contamination in paddy soil.
谢伟, 谭向平, 田海霞, 王紫泉, 杨瑞, 韦革宏, 和文祥. 土壤水分对稻田土壤有效砷及碱性磷酸酶活性影响[J]. 中国环境科学, 2016, 36(8): 2418-2424.
XIE Wei, TAN Xiang-ping, TIAN Hai-xia, WANG Zi-quan, YANG Rui, WEI Ge-hong, HE Wen-xiang. Effects of soil moisture on available arsenic and alkaline phosphatase activity in paddy soil. CHINA ENVIRONMENTAL SCIENCECE, 2016, 36(8): 2418-2424.
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