Effects of livestock grazing on soil nitrogen mineralization on Hulunber meadow steppe, China
Soil nitrogen (N) cycling is an important factor in terrestrial ecosystems, including grasslands. Understanding the effects of grazing on nitrogen cycling in grassland ecosystems is critical for better management and for improving knowledge of the mechanisms underlying grassland degradation and can...
| Main Authors: | , , , , , , |
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| Format: | Journal Article |
| Language: | Inglés |
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Czech Academy of Agricultural Sciences
2016
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| Online Access: | https://hdl.handle.net/10568/77351 |
| _version_ | 1855516290212429824 |
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| author | Yan, R. Yang, G. Chen, B. Yan, Y. Xin, X. Li, L. Zhu, X. |
| author_browse | Chen, B. Li, L. Xin, X. Yan, R. Yan, Y. Yang, G. Zhu, X. |
| author_facet | Yan, R. Yang, G. Chen, B. Yan, Y. Xin, X. Li, L. Zhu, X. |
| author_sort | Yan, R. |
| collection | Repository of Agricultural Research Outputs (CGSpace) |
| description | Soil nitrogen (N) cycling is an important factor in terrestrial ecosystems, including grasslands. Understanding the effects of grazing on nitrogen cycling in grassland ecosystems is critical for better management and for improving knowledge of the mechanisms underlying grassland degradation and can provide basic information for sustainable development in grassland ecosystems. In this study, in situ incubation in intact soil cores was used to measure seasonal changes in soil nitrogen mineralization and nitrification in the meadow steppe of the Hulunber grasslands of northeastern China. Soil plots were subjected to varying intensities of cattle grazing, and soil characteristics including several aspects of the nitrogen cycle were analysed. The findings demonstrate that soil inorganic N pools and nitrogen mineralization peaked in August and that moderate grazing intensity produced higher seasonal mean net N mineralization (Amin); net nitrogen mineralization rate (Rmin); net ammonification rate (Ramm) and net nitrification rate (Rnit). Seasonal mean net mineralization rate was increased by 6–15% in the lightly and moderately grazed plots (0.34–0.46 AU cow/ha) and by 4–5% in the heavily grazed plots (0.69–0.92 AU cow/ha). Also it was found that soil moisture was significantly positively correlated with inorganic N, Amin, Ramm and Rmin and significantly negatively correlated with Rnit, while soil temperature exhibited the opposite effect. The obtained results demonstrated net nitrogen mineralization and ammonium rates, which were strongly linked to grazing intensity, soil temperature and soil moisture. |
| format | Journal Article |
| id | CGSpace77351 |
| institution | CGIAR Consortium |
| language | Inglés |
| publishDate | 2016 |
| publishDateRange | 2016 |
| publishDateSort | 2016 |
| publisher | Czech Academy of Agricultural Sciences |
| publisherStr | Czech Academy of Agricultural Sciences |
| record_format | dspace |
| spelling | CGSpace773512025-11-12T05:38:15Z Effects of livestock grazing on soil nitrogen mineralization on Hulunber meadow steppe, China Yan, R. Yang, G. Chen, B. Yan, Y. Xin, X. Li, L. Zhu, X. nitrogen ecosystems climate change environmental factors nutrient cycling in ecosystems grazing intensity Soil nitrogen (N) cycling is an important factor in terrestrial ecosystems, including grasslands. Understanding the effects of grazing on nitrogen cycling in grassland ecosystems is critical for better management and for improving knowledge of the mechanisms underlying grassland degradation and can provide basic information for sustainable development in grassland ecosystems. In this study, in situ incubation in intact soil cores was used to measure seasonal changes in soil nitrogen mineralization and nitrification in the meadow steppe of the Hulunber grasslands of northeastern China. Soil plots were subjected to varying intensities of cattle grazing, and soil characteristics including several aspects of the nitrogen cycle were analysed. The findings demonstrate that soil inorganic N pools and nitrogen mineralization peaked in August and that moderate grazing intensity produced higher seasonal mean net N mineralization (Amin); net nitrogen mineralization rate (Rmin); net ammonification rate (Ramm) and net nitrification rate (Rnit). Seasonal mean net mineralization rate was increased by 6–15% in the lightly and moderately grazed plots (0.34–0.46 AU cow/ha) and by 4–5% in the heavily grazed plots (0.69–0.92 AU cow/ha). Also it was found that soil moisture was significantly positively correlated with inorganic N, Amin, Ramm and Rmin and significantly negatively correlated with Rnit, while soil temperature exhibited the opposite effect. The obtained results demonstrated net nitrogen mineralization and ammonium rates, which were strongly linked to grazing intensity, soil temperature and soil moisture. 2016-05-31 2016-10-21T13:38:27Z 2016-10-21T13:38:27Z Journal Article https://hdl.handle.net/10568/77351 en Open Access application/pdf Czech Academy of Agricultural Sciences Yan, R.; Yang, G.; Chen, B.; Wang, X.; Yan, Y.; Xin, X.; Li, L.; Zhu, X.; Bai, K.; Rong, Y.; Hou, L. (2016). Effects of livestock grazing on soil nitrogen mineralization on Hulunber meadow steppe, China . Plant, Soil and Environment 62 p. 202-209 ISSN: 1214-1178 |
| spellingShingle | nitrogen ecosystems climate change environmental factors nutrient cycling in ecosystems grazing intensity Yan, R. Yang, G. Chen, B. Yan, Y. Xin, X. Li, L. Zhu, X. Effects of livestock grazing on soil nitrogen mineralization on Hulunber meadow steppe, China |
| title | Effects of livestock grazing on soil nitrogen mineralization on Hulunber meadow steppe, China |
| title_full | Effects of livestock grazing on soil nitrogen mineralization on Hulunber meadow steppe, China |
| title_fullStr | Effects of livestock grazing on soil nitrogen mineralization on Hulunber meadow steppe, China |
| title_full_unstemmed | Effects of livestock grazing on soil nitrogen mineralization on Hulunber meadow steppe, China |
| title_short | Effects of livestock grazing on soil nitrogen mineralization on Hulunber meadow steppe, China |
| title_sort | effects of livestock grazing on soil nitrogen mineralization on hulunber meadow steppe china |
| topic | nitrogen ecosystems climate change environmental factors nutrient cycling in ecosystems grazing intensity |
| url | https://hdl.handle.net/10568/77351 |
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