Research on soil net nitrogen mineralization in Stipa grandis grassland with different stages of degradation

Wanyu Wen; Xiaobing Li; Lihong Chen; Dandan Wei; Han Wang; Meng Zhang; Jing Yu

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자료유형: 학술저널

저자정보: Wanyu Wen (Chinese Academy of Forestry) Xiaobing Li (Beijing Normal University) Lihong Chen (Beijing Normal University) Dandan Wei (Beijing Normal University) Han Wang (Beijing Normal University) Meng Zhang (Beijing Normal University) Jing Yu (Beijing Normal University)

저널정보: 한국지질과학협의회 Geosciences Journal Geosciences Journal Vol.20 No.4

발행연도: 2016.1

수록면: 485 - 494 (10page)

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Net nitrogen mineralization is one of the nitrogen cycling process, and it is very important to understand nitrogen mineralization characteristics in degradation grassland. In the upper 0–10 cm soil layer of Stipa grandis P. A. Smirn. grassland in the Xilin river basin, Inner Mongolia, we studied the soil net nitrogen mineralization and nitrification among three varying stages of degradation grassland and analyzed the relationship between the mineralization rate of the soil net nitrogen and environmental factors, using the resin-core incubation method. Our results demonstrated that, from May to October 2012, the accumulated net nitrogen mineralization was 21.620 mg kg–1, 12.486 mg kg–1, and 48.053 mg kg–1 in the slightly, medium, and heavily degraded grasslands, respectively and varied greatly among the three stages of degradation shown by the S. grandis grassland plots. During the cultivation period, the variation of net nitrogen mineralization and nitrification was similar to the variation of soil mineral nitrogen. The higher soil mineral nitrogen content indicated higher mineralization of net nitrogen. In July and August, soil moisture was positively correlated with the net nitrogen mineralization rate, and the correlation coefficients between these two factors of 0.73, 0.58, and 0.79 for the slightly, medium, and heavily degraded plots, respectively. The rates of net nitrogen mineralization and nitrification were negatively correlated with soil total nitrogen, but positively correlated with C/N ratio, and weakly correlated with other physicochemical properties.

참고문헌 (53)

참고문헌 신청

An, Y. / 1999 / The difference between the grass and soil in different stage of grassland deterioration / Grassland of China 4:31~36

Bhogal, A. / 1999 / Comparison of methodologies for field measurement of net nitrogen mineralisation in arable soils / Plant and Soil 207:15~28

Biondini, M. E. / 1998 / Grazing intensity and ecosystem processes in a northern mixed-grass prairie, USA / Ecological Applications 8:469~479

Cai, X. B. / 2008 / Characteristics of soil fertility in alpine steppes at different degradation grades / Acta Ecologica Sinica 28:1034~1044

Cheng, Y. / 2013 / Soil pH has contrasting effects on gross and net nitrogen mineralizations in adjacent forest and grassland soils in central Alberta, Canada / Soil Biology and Biochemistry 57:848~857

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이 논문의 저자 정보

Wanyu Wen

소속기관 Chinese Academy of Forestry

주요연구분야 자연과학 > 지구과학 > 지질학

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Xiaobing Li