Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1111/gcb.15361 |
Long‐term active restoration of extremely degraded alpine grassland accelerated turnover and increased stability of soil carbon | |
Yanfu Bai; Lina Ma; Abraham A. Degen; Muhammad K. Rafiq; Yakov Kuzyakov; Jingxue Zhao; Rui Zhang; Tao Zhang; Wenyin Wang; Xiaogang Li; Ruijun Long; Zhanhuan Shang | |
2020-10-13 | |
发表期刊 | Global Change Biology
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出版年 | 2020 |
英文摘要 | Soil nutrient contents and organic carbon (C) stability are key indicators for restoration of degraded grassland. However, the effects of long‐term active restoration of extremely degraded grassland on soil parameters have been equivocal. The aims of this study were to evaluate the impact of active restoration of degraded alpine grassland on: (a) soil organic matter (SOM) mineralization; and (b) the importance of biotic factors for temperature sensitivity (Q10) of SOM mineralization. Soils were sampled from intact, degraded and restored alpine grasslands at altitudes ranging between 3,900 and 4,200 m on the Tibetan Plateau. The samples were incubated at 5, 15 and 25°C, and Q10 values of SOM mineralization were determined. Structural equation modeling was used to evaluate the importance of vegetation, soil physico‐chemical properties and microbial parameters for Q10 regulation. The Q10 of N mineralization was similar among intact, degraded and restored soils (0.84–1.24) and was higher in topsoil (1.09) than in subsoil (0.92). The best predictive factor of CO2‐Q10 for intact grassland was microbial biomass, for degraded grassland was basal microbial respiration, and for restored grassland was soil bulk density. Restoration by planting vegetation decreased the Q10 of SOM mineralization as soil bulk density, the most important negative predictor, increased in restored grassland. The Q10 of SOM mineralization in topsoil was 14% higher than in subsoil because of higher microbial abundance and exo‐enzyme activities. The NH4+ content was greatest in intact soil, while NO3− content was greatest in degraded soil. The SOM mineralization rate decreased with grassland degradation and increased after long‐term (>10 years) restoration. In conclusion, extremely degraded grassland needs proper long‐term management in active restoration projects, especially for improvement of soil nutrients in a harsh environment. |
领域 | 气候变化 ; 资源环境 |
URL | 查看原文 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/299206 |
专题 | 气候变化 资源环境科学 |
推荐引用方式 GB/T 7714 | Yanfu Bai,Lina Ma,Abraham A. Degen,等. Long‐term active restoration of extremely degraded alpine grassland accelerated turnover and increased stability of soil carbon[J]. Global Change Biology,2020. |
APA | Yanfu Bai.,Lina Ma.,Abraham A. Degen.,Muhammad K. Rafiq.,Yakov Kuzyakov.,...&Zhanhuan Shang.(2020).Long‐term active restoration of extremely degraded alpine grassland accelerated turnover and increased stability of soil carbon.Global Change Biology. |
MLA | Yanfu Bai,et al."Long‐term active restoration of extremely degraded alpine grassland accelerated turnover and increased stability of soil carbon".Global Change Biology (2020). |
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