钝化剂与肥料对油菜和孔雀草间作体系的影响

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Abstract A pot experiment was conducted to investigate the effects of mercapto-modified palygorskite (MPAL), K₂SO₄, and foliar spraying with MnSO₄ on the biomass and Cd accumulation in the plants and Cd fractions in soils under the mode of monoculture of low-Cd accumulating cultivar of Brassica chinenesis L., and intercropped B. chinensis and Cd hyperaccumulator Tagetes patula L. The results showed that MPAL significantly reduced Cd concentrations in the shoots of B. chinenesis and T. patula, Cd accumulation in the shoot of B. chinensis, Cd extraction ratio (CER), and available Cd in the soil. Addition of K₂SO₄ with 0.4g/kg significantly increased Cd accumulation in the shoot of T. patula, while it reduced Cd uptake in the shoot of B. chinensis. Meanwhile, in the intercropped systems the percentage of exchangeable Cd fraction in the rhizosphere soil was decreased, and the ratio of residual Cd fraction was on the contrary. Foliar spraying with 0.6g/L MnSO₄ could significantly inhibit Cd concentration, Cd accumulation and CER in the shoot of B. chinensis under the monoculture treatment. In view of reducing Cd uptake and ensuring quality and safety of B. chinenesis, and meanwhile it did not affect CER, the addition of 0.4g/kg K₂SO₄ was recommended for the intercropping system of B. chinenesis and T. patula.

Key words： low-cadmium accumulating cultivar of pakchoi Tagetes patula passivator potassic fertilizer foliar spraying

Received: 06 July 2020

PACS:

X171.5

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	Articles by authors
	YAN Xiu-xiu
	XU Ying-ming
	WANG Lin
	TAO Xue-ying
	SUN Yue-bing
	LIANG Xue-feng

Cite this article:

YAN Xiu-xiu,XU Ying-ming,WANG Lin等. Effects of immobilization agent and fertilizers on the intercropping system Brassica chinenesis and Tagetes patula[J]. CHINA ENVIRONMENTAL SCIENCECE, 2021, 41(3): 1264-1271.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2021/V41/I3/1264

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