Root respiration and its relation to nutrient contents in soil and root and EVI among 8 ecosystems, northern China
Root respiration and its relation to nutrient contents in soil and root and EVI among 8 ecosystems, northern China
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中国北方8个生态系统根系呼吸及其与土壤和根系养分含量及EVI的关系
DOI：
10.1007/s11104-010-0354-x
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发表时间：
2010-03
期刊：
影响因子：
4.9
通讯作者：
中科院分区：
文献类型：
--
作者：
根呼吸是生态系统碳收支的一个关键且不确定的组成部分。研究了参考温度下根系呼吸变化与根系和土壤养分含量变化以及植被指数（EVI）的相关性。8个生态系统包括3个森林、2个灌丛、2个草甸草原和1个森林-草原过渡带。在对不同根径的数据进行汇总时，质量比根呼吸与根氮含量呈正相关。面积比根呼吸通过增加细根生物量而随着土壤有效氮的增加而增加。除了土壤和根系养分含量的影响外，细根质量比呼吸也遵循EVI模式，表明根系呼吸强烈依赖光合作用。简单的呼吸- evi关系可以提供一种方便的方法来估计根呼吸，并在定量空间外推中具有潜在的应用前景。
Root respiration is a critical and uncertain component of ecosystem carbon budgets. We assessed whether variation in root respiration at a reference temperature were associated with that of root and soil nutrient contents and enhanced vegetation index (EVI) among 8 ecosystems, including three forests, two shrublands, two meadow grasslands, and one meadow in a forest-steppe ecotone in northern China. Mass specific root respiration was positively related to root nitrogen content when data from all the different classes of root diameter were pooled. Area specific root respiration increased with soil available nitrogen through increasing fine root biomass. Beside the effect of soil or root nutrient contents, mass specific respiration of fine roots followed EVI patterns, suggesting that root respiration was strongly dependent on photosynthesis. A simple respiration–EVI relationship may provide a convenient way to estimate root respiration and has potential applications in quantitative spatial extrapolation.
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通讯作者：
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DOI：
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DOI：
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发表时间：
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期刊：
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