Mechanism of heavy metal uptake and transport in soil-rice/wheat system and regulation measures for safe production
WANG Cheng-chen1, TIAN Wen1, XIANG Ping1, XU Wu-mei2, GUAN Dong-xing3, Lena Q. MA3
1. School of Ecology and Environment/Institute of Environmental Remediation and Human Health, Southwest Forestry University, Kunming 650224, China; 2. School of Energy and Environment Science, Yunnan Normal University, Kunming 650500, China; 3. College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058, China
Abstract：To master the heavy metal pollution in rice and wheat crops from main production regions in China, we collected the data from existing literature and analyzed the concentrations of arsenic (As), cadmium (Cd), chromium (Cr) and lead (Pb) in soil-rice/wheat system, summarized their underlying mechanisms of target heavy metals absorption, transport, and accumulation. In addition, effective remediation measures for safe production were also introduced. The results showed that 31.3% and 22.2% of Cd, 26.2% and 32.1% of Pb in rice and wheat grains are over the value of China National Standard (GB2762-2017). Reducing the bioavailability of As, Cd, Cr and Pb and controlling their absorption in the soil-rice/wheat system could effectively decrease their accumulation in grains. The heavy metals uptake in soils-crop systems can be effectively decreased by water and fertilizer management, chemical modification, phytoremediation, bioremediation and genetic methods to achieve safe production. In the future, we should form a multi-disciplinary and integrated all factor pattern to improve the soil pollution research in China. Furthermore, developing the contaminated soil utilization technology for the safe production of agricultural products, so as to better ensure the national food safety production.
王成尘, 田稳, 向萍, 徐武美, 管冬兴, 马奇英. 土壤-水稻/小麦重金属吸收机制与安全调控[J]. 中国环境科学, 2022, 42(2): 794-807.
WANG Cheng-chen, TIAN Wen, XIANG Ping, XU Wu-mei, GUAN Dong-xing, Lena Q. MA. Mechanism of heavy metal uptake and transport in soil-rice/wheat system and regulation measures for safe production. CHINA ENVIRONMENTAL SCIENCECE, 2022, 42(2): 794-807.
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