东北黑土区旱地土壤剖面除草剂残留及其影响因素

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Abstract This study examined the vertical distribution of herbicide residues in 14 typical dryland soil profiles (0~100cm) from the black soil region of Northeast China. Residues from 57 different herbicides were measured across various soil depths to clarify their vertical distribution characteristics and influencing factors. The findings revealed that herbicide residue characteristics were primarily influenced by the application strategies under different land uses. Notably, nicosulfuron, a commonly used herbicide in cornfields, exhibited significantly higher residue levels in the 0~60cm soil layer compared to other herbicides. A negative correlation was observed between the herbicide's octanol-water partition coefficient (logK_ow) and its distribution ratio in the surface soil (0~20cm) (P<0.001), while a positive correlation was found between the herbicide's degradation period and its distribution ratio in the deep soil (80~100cm) (P<0.05). Additionally, soil pH was negatively correlated with herbicide residues in surface soils (P<0.05), and soil bulk density was negatively correlated with herbicide residues in deep soils (P<0.05). Summer rainfall was found to enhance the vertical migration of herbicides within the soil profile. These results provide crucial data and a scientific foundation for the mitigating, risk control and management of herbicide residues in the agricultural soils of China's black soil region.

Key words： black soil herbicide soil profile residual characteristics influencing factor

Received: 18 June 2024

PACS:

X592

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	Articles by authors
	LIU Han-qiang
	LI Rui
	JIAN Le
	HU Wen-you
	XIE En-ze
	HUANG Biao
	ZHAO Yong-cun

Cite this article:

LIU Han-qiang,LI Rui,JIAN Le等. Residues and influencing factors of herbicides in dryland soil profiles in the black soil region of Northeast China[J]. CHINA ENVIRONMENTAL SCIENCECE, 2025, 45(1): 243-252.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2025/V45/I1/243

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