Pathways of nitrogen loss and optimized nitrogen management for a rice cropping system in arid irrigation region, northwest China

Journal of Environmental Management
Zhan XiaoyingYang Zhengli

Abstract

The reactive nitrogen (N) loss of the rice cropping system in the arid region shows a different pattern from that of subtropical humid region due to different climate types and crop management. However, little attention has been paid to this region. To fill this knowledge gap, a two-year (2009-2010) field observation was conducted in the Ningxia irrigation region, northwest China, to explore the major pathway of N loss following local farmers' optimal practice. Further, we determined the site-specific emission factors of ammonia and nitrous oxide, rate of surface runoff and subsurface (leaching and seepage) to improve the inventory resolution of arid irrigation region. Results showed that ammonia volatilization (45%-49% of total N loss), leaching and seepage (30%-33% of total N loss) were proved to be the primary factors of N loss in rice paddy fields. The emission factor of ammonia (21%) and N leaching rate (7.5%) following farmers' practice were 2.1 and 5.4 times higher than the country-specific default value in China. The country-specific N runoff rate and emission factor of N2O could be directly adopted in this region. A 20% reduction of N fertilizer to farmers' practice (300 kg N ha-1) alongside the application of organic ...Continue Reading

References

Feb 19, 2009·Proceedings of the National Academy of Sciences of the United States of America·Xiao-Tang JuFu-Suo Zhang
Jan 30, 2010·Science·H Charles J GodfrayCamilla Toulmin
Sep 5, 2014·Nature·Xinping ChenFusuo Zhang
Dec 29, 2015·Environmental Science & Technology·Feng ZhouShuoshuo Gao
Dec 20, 2016·Nature Plants·Chuang ZhaoJosep Peñuelas
Jun 2, 2017·Environmental Science & Technology·Xiaoying ZhanXiaoyan Tang
Nov 29, 2017·Environmental Pollution·Xikang HouYanhong Tang
Jan 13, 2018·Environmental Pollution·Hongyuan WangHongbin Liu
Jan 29, 2019·Environmental Science and Pollution Research International·Xiaoying ZhanHongbin Liu

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Citations

Jun 21, 2020·Journal of Environmental Management·Avelino Núñez-DelgadoMuhammad Shaaban

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