生物炭及炭基肥对油麦菜生长及吸收重金属的影响

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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.

Key words： biochar amelioration heavy metal remediation immobilization

Received: 19 February 2016

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	Articles by authors
	LIU Chong
	LIU Xiao-wen
	WU Wen-cheng
	CAI Xin-de
	LIANG Xiao
	LI Yun-biao
	NAN Zhong-ren

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LIU Chong,LIU Xiao-wen,WU Wen-cheng等. Effect of biochar and biochar based fertilizer on growth of Lactuca sativa L. and absorption of heavy metals[J]. CHINA ENVIRONMENTAL SCIENCECE, 2016, 36(10): 3064-3070.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2016/V36/I10/3064

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