内蒙古河套灌区盐碱土壤N<sub>2</sub>O排放特征

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Abstract It were chosen for high saline-alkaline soil, S₁[electrical conductivity (EC) 2.60dS/m] and low saline-alkaline soil, S₂[electrical conductivity (EC) 0.74dS/m] in Hetao Irrigation District of Inner Mongolia. The static box method was used in field in-situ observation test for 3year. A 3-yr study was conducted with sunflower crops in intensively managed saline-alkaline soils cropping systems in northeastern China to examine the effects of salt and alkali on N₂O emissions. Results indicated that high saline-alkaline soil significantly increased N₂O emissions with obvious differences as compared with low saline-alkaline soil. The accumulative emissions of N₂O during the 3-year observation period were estimated at 180.6mg/m², 167.6mg/m² and 118.2mg/m² for the low saline-alkaline soil. Compared with low saline-alkaline soil, the high saline-alkaline soil significantly increased the accumulative emissions of N₂O by 19%, 26% and 45% from 2014 to 2016, respectively. Our findings suggest that mitigating N₂O emissions on saline-alkaline soil can be achieved by remediating saline-alkaline soil.

Key words： saline-alkaline soils different saline-alkaline levels N₂O emissions

Received: 22 August 2018

PACS:	X511
	S151.9
	S182

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	YANG Wen-zhu
	JIAO Yan
	YANG Ming-de
	WEN Hui-yang

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YANG Wen-zhu,JIAO Yan,YANG Ming-de等. N₂O emissions from saline-alkaline soil with different saline-alkaline levels in the Hetao Irrigation District of Inner Mongolia, China[J]. CHINA ENVIRONMENTAL SCIENCECE, 2019, 39(3): 948-953.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2019/V39/I3/948

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