Soil respiration sensitivities to water and temperature in a revegetated desert (SCI)
文献类型：期刊论文
| 作者 | Zhang Z. S.; Dong X. J.; Xu B. X.; Chen Y. L.; Zhao Y.; Gao Y. H.; Hu Y. G.; Huang L. |
| 刊名 | Journal of Geophysical Research-Biogeosciences
 |
| 出版日期 | 2015 |
| 卷号 | 120期号:4页码:773-787 |
| 英文摘要 | Soil respiration in water-limited ecosystems is affected intricately by soil water content (SWC), temperature, and soil properties. Eight sites on sand-fixed dunes that revegetated in different years since 1950s, with several topographical positions and various biological soil crusts (BSCs) and soil properties, were selected, as well as a moving sand dune (MSD) and a reference steppe in the Tengger Desert of China. Intact soil samples of 20cm in depth were taken and incubated randomly at 12 levels of SWC (0 to 0.4m(3)m(-3)) and at 9 levels of temperature (5 to 45 degrees C) in a growth chamber; additionally, cryptogamic and microbial respirations (R-M) were measured. Total soil respiration (R-T, including cryptogamic, microbial, and root respiration) was measured for 2years at the MSD and five sites of sand-fixed dunes. The relationship between R-M and SWC under the optimal SWC condition (0.25m(3)m(-3)) is linear, as is the entire range of R-T and SWC. The slope of linear function describes sensitivity of soil respiration to water (SRW) and reflects to soil water availability, which is related significantly to soil physical properties, BSCs, and soil chemical properties, in decreasing importance. Inversely, Q(10) for R-M is related significantly to abovementioned factors in increasing importance. However, Q(10) for R-T and respiration rate at 20 degrees C are related significantly to soil texture and depth of BSCs and subsoil only. In conclusion, through affecting SRW, soil physical properties produce significant influences on soil respiration, especially for R-T. This indicates that a definition of the biophysical meaning of SRW is necessary, considering the water-limited and coarse-textured soil in most desert ecosystems. |
| 收录类别 | SCI |
| 语种 | 英语 |
| 源URL | [http://ir.casnw.net/handle/362004/27652]  |
| 专题 | 寒区旱区环境与工程研究所_中科院寒区旱区环境与工程研究所（未分类）_期刊论文 |
| 推荐引用方式 GB/T 7714 | Zhang Z. S.,Dong X. J.,Xu B. X.,et al. Soil respiration sensitivities to water and temperature in a revegetated desert (SCI)[J]. Journal of Geophysical Research-Biogeosciences,2015,120(4):773-787. |
| APA | Zhang Z. S..,Dong X. J..,Xu B. X..,Chen Y. L..,Zhao Y..,...&Huang L..(2015).Soil respiration sensitivities to water and temperature in a revegetated desert (SCI).Journal of Geophysical Research-Biogeosciences,120(4),773-787. |
| MLA | Zhang Z. S.,et al."Soil respiration sensitivities to water and temperature in a revegetated desert (SCI)".Journal of Geophysical Research-Biogeosciences 120.4(2015):773-787. |
入库方式： OAI收割
来源：寒区旱区环境与工程研究所
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