天然有机酸对伴矿景天吸取土壤镉的影响

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Abstract Field experiments were conducted to study the effects of low, medium and high doses of natural organic acids (malic acid and citric acid) using hole or spray application on the remediation of slightly acidic Cadmium (Cd) contaminated soil and the Cd accumulation in shoots of Sedum plumbizincicola, Then the best application pattern of natural organic acid was determined. Results showed that compared with the control, the hole/spray application of natural organic acid for 0~30d significantly reduced the soil pH value and increased available Cd concentrations in soil. The shoot biomass and Cd concentration in shoot of S. plumbizincicola were significantly increased after 60d. Spray application of low concentration citric acid is proved to be the best pattern. Compared with the control, the soil pH value decreased by 0.32 units and soil available Cd increased by 29.4% after 10d. After 60d, the shoot biomass of S. plumbizincicola increased by 38.6%, the shoot Cd content increased by 30.7%, and the shoot Cd extraction increased by 81.7%. The results showed that both malic acid and citric acid using hole/spray application were effective methods to assist S. plumbizincicola in the remediation of acidic Cd contaminated farmland soil, and the optimal application pattern was 75kg citric acid sprayed per hectare.

Key words： hole application spray application malic acid citric acid Sedum plumbizincicola Cd

Received: 12 October 2022

PACS:	X53
	X173

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	Articles by authors
	LI Kan-qi
	WU Jia-ling
	CHEN Zhe
	LI Mao-lin
	ZHOU Hong-yan

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LI Kan-qi,WU Jia-ling,CHEN Zhe等. Effects of natural organic acids on cadmium uptake by Sedum plumbizincicola from the soil[J]. CHINA ENVIRONMENTAL SCIENCECE, 2023, 43(5): 2413-2422.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2023/V43/I5/2413

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