Stand ages regulate the response of soil respiration to temperature in a Larix principis-rupprechtii plantation
Stand ages regulate the response of soil respiration to temperature in a Larix principis-rupprechtii plantation
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林龄调节华北落叶松人工林土壤呼吸对温度的响应
DOI：
10.1016/j.agrformet.2013.10.008
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发表时间：
2014-01
影响因子：
6.2
通讯作者：
Yang, Yan
中科院分区：
文献类型：
--
作者：
Yue, Chao;Yue, Chao;Yang, Yan;Yang, Yan
了解土壤呼吸及其对温度的敏感性与包括林龄在内的森林结构之间的联系，对于准确评估植树造林对全球碳平衡的影响至关重要。研究了中国北部3个华北落叶松人工林(10年生、20年生和45年生成熟林)土壤呼吸(RS)及其组成部分(土壤异养(RH)和自养(RA)呼吸)随季节温度变化的变化。结果表明，RS、RHandRA有显著的季节变化(P<；P<；0.001)，林龄对RH有显著的影响(P=0.004)。在三种年龄林分中，幼林在无雪季节的相对湿度最低，这可能是由于土壤有机碳最低所致。结果表明，Rh的Q10值(从2.69到3.03)明显低于Ofra(从3.06到4.39)。此外，RH值的Q10显著依赖于林分年龄。成熟林的Q10值(3.03±0.09)显著高于幼龄林(2.69±0.08)，说明林龄在调节土壤呼吸对温度变化的响应中具有重要意义。研究还发现，由于幼龄林土壤温度最高，幼龄林土壤有机碳的瞬时周转速率显著快于幼龄林和成熟林(P<；0.001)。在研究人工林对全球碳循环的影响时，也必须考虑林分年龄对非生物因素对土壤碳循环的影响。
Understanding the linkage of soil respiration and its sensitivity to temperature with forest structure including stand age is critical for accurately assessing the impact of afforestation on global carbon balance. In this study, we investigated the changes of soil respiration (RS) and its components (soil heterotrophic (RH) and autotrophic (RA) respiration) in response to seasonal temperature change over threeLarix principis-rupprechtiiplantation stands (10-year-old sapling stand, 20-year-old young stand and 45-year-old mature stand) in North China. We found a significant seasonal variation ofRS,RHandRA(P< 0.001), and significant stand age effect onRH(P= 0.004). Among the three age stands, sapling stand has the lowestRHduring the snow-free season, possibly due to the lowest soil organic carbon. All three stands show thatRSexponentially increases with increasing temperature, and theQ10ofRH(from 2.69 to 3.03) is significantly lower than that ofRA(from 3.06 to 4.39). Furthermore, theQ10ofRHis significantly dependent on stand age. TheQ10ofRHat mature stand (3.03 ± 0.09) was substantially higher than that at sapling stand (2.69 ± 0.08), highlighting the importance of stand age in regulating the response of soil respiration to temperature change. We also found that the transient turnover rate of soil organic carbon in sapling stand is significantly faster than those in young and mature stands (P< 0.001) due to the highest soil temperature at sapling stand. Such regulations of stand age on soil carbon cycling through abiotic factors must also be taken into account when investigating the effect of plantation on the global carbon cycle.
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影响因子：
8.8
作者：
Bradford, Mark A.;Davies, Christian A.;Wallenstein, Matthew D.
通讯作者：
Wallenstein, Matthew D.
影响因子：
11.6
作者：
Jianwu Tang;P. Bolstad;Jonathan G Martin
通讯作者：
Jianwu Tang;P. Bolstad;Jonathan G Martin
影响因子：
4
作者：
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通讯作者：
R. Vargas;M. Carbone;M. Reichstein;D. Baldocchi
影响因子：
4
作者：
Schlesinger, WH;Andrews, JA
通讯作者：
Andrews, JA
影响因子：
64.8
作者：
Högberg, P;Nordgren, A;Read, DJ
通讯作者：
Read, DJ