Centennial-scale analysis of the creation and fate of reactive nitrogen in China (1910-2010)

Cui S.; Shi Y.; Groffman P.M.Schlesinger W.H.Zhu Y.-G.

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Centennial-scale analysis of the creation and fate of reactive nitrogen in China (1910-2010)

机译：Centennial-scale analysis of the creation and fate of reactive nitrogen in China (1910-2010)

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Human mobilization and use of reactive nitrogen (Nr) has been one of the major aspects of global change over the past century. Nowhere has that change been more dramatic than in China, where annual net Nr creation increased from 9.2 to 56 Tg from 1910 to 2010. Since 1956, anthropogenic Nr creation exceeded natural Nr creation, contributing over 80of total Nr until 2010. There is great interest and uncertainty in the fate and effects of this Nr in China. Here, a comprehensive inventory of Nr in China shows that Nr (including recycled Nr) has continuously and increasingly accumulated on land (from 17 to 45 Tg), accompanied by increasing transfers to the atmosphere (before deposition; from 7.6 to 20 Tg), inland waters (from 2.7 to 9.6 Tg), and coastal waters (from 4.5 to 7.7 Tg) over the past 30 y. If current trends continue, Nr creation from human activities will increase to 63 Tg by 2050, raising concerns about deleterious environmental consequences for land, air, and water at regional and global scales. Tremendous amounts of Nr have accumulated in plants, soils, and waters in China over the past 30 y, but the retention capacity of the terrestrial landscape seems to be declining. There is a possibility that the negative environmental effects of excessive Nr may accelerate in coming decades, increasing the urgency to alter the trajectory of increasing Nr imbalance. Here, a conceptual framework of the relationships between human drivers and Nr cycling in China is oriented and well-targeted to Chinese abatement strategies for Nr environmental impact.

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《Proceedings of the National Academy of Sciences of the United States of America》 |2013年第6期|2052-2057|共6页
作者
Cui S.; Shi Y.; Groffman P.M.Schlesinger W.H.Zhu Y.-G.;
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作者单位

Key Lab of Urban Environment and Health, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China;

Cary Institute of Ecosystem Studies, Millbrook, NY 12545, United States;

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收录信息美国《科学引文索引》(SCI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
原文格式 PDF
正文语种英语
中图分类自然科学总论;
关键词
Biogeochemical cycling; Chemical fertilizer; National nitrogen budget; Nitrogen use efficiency;

Centennial-scale analysis of the creation and fate of reactive nitrogen in China (1910-2010)

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