N2O emissions from saline-alkaline soil with different saline-alkaline levels in the Hetao Irrigation District of Inner Mongolia, China
YANG Wen-zhu1,2, JIAO Yan1,3, YANG Ming-de1, WEN Hui-yang1
1. Water-saving Agricultural Engineering Research Center, Inner Mongolia Normal University, Hohhot 010022, China; 2. Inner Mongolia Key Laboratory of Environmental Chemistry, Hohhot 010022, China; 3. College of Chemistry and Environmental Sciences, Inner Mongolia Normal University, Hohhot 010022, China
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.
杨文柱, 焦燕, 杨铭德, 温慧洋. 内蒙古河套灌区盐碱土壤N2O排放特征[J]. 中国环境科学, 2019, 39(3): 948-953.
YANG Wen-zhu, JIAO Yan, YANG Ming-de, WEN Hui-yang. N2O emissions from saline-alkaline soil with different saline-alkaline levels in the Hetao Irrigation District of Inner Mongolia, China. CHINA ENVIRONMENTAL SCIENCECE, 2019, 39(3): 948-953.
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