Effect of biochar and biochar based fertilizer on growth of Lactuca sativa L. and absorption of heavy metals
LIU Chong1,2, LIU Xiao-wen1, WU Wen-cheng1, CAI Xin-de1, LIANG Xiao1, LI Yun-biao1, NAN Zhong-ren2
1. South China Institute of Environmental Science, Ministry of Environmental Protection, Guangzhou 510655,China; 2. Key Laboratory of Western China's Environmental System (Ministry of Education), Gansu Key Laboratory for Environmental Pollution Prediction and Control, College of Earth and Environmental Sciences, Lanzhou University, Lanzhou 730000, China
Abstract：A pot experiment was conducted out for paddy soil and lettuceto study the effects of amendment of biochar and biochar based fertilizer on growth of lettuce and absorption of heavy metals. The results indicated that rice straw biochar and biochar based fertilizer could promote the growth of lettuceand improved soil physical and chemical properties except NH4+-N. Heavy metals content of various parts of lettucedecreased with treatment and the order of heavy metals content in different plant tissues was root> shoot. There was a distinct reduce of heavy metals after the application of high dose of biochar based fertilizer and Cd, Cu, Pb and Zn content of lettuce leaf could be reduced by 34.78%, 29.37%, 46.59% and 40.95%, respectively. Bioaccumulation factors of Cd, Cu, Pb and Zn in different plant tissues of lettuce showed a decreasing trend while transfer coefficient of Cd, Cu and Zn in shoot increased with treatment. Biochar and biochar based fertilizer could significantly inhibit the absorption and accumulation of heavy metals in lettucein paddy soil.
刘冲, 刘晓文, 吴文成, 蔡信德, 梁啸, 李云标, 南忠仁. 生物炭及炭基肥对油麦菜生长及吸收重金属的影响[J]. 中国环境科学, 2016, 36(10): 3064-3070.
LIU Chong, LIU Xiao-wen, WU Wen-cheng,CAI Xin-de, LIANG Xiao, LI Yun-biao, NAN Zhong-ren. Effect of biochar and biochar based fertilizer on growth of Lactuca sativa L. and absorption of heavy metals. CHINA ENVIRONMENTAL SCIENCECE, 2016, 36(10): 3064-3070.
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