Controlling Factors of Soil CO2 Efflux in Pinus yunnanensis across Different Stand Ages.
Controlling Factors of Soil CO2 Efflux in Pinus yunnanensis across Different Stand Ages.
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不同林龄云南松土壤CO2流出的控制因素
DOI：
10.1371/journal.pone.0127274
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发表时间：
2015
期刊：
影响因子：
3.7
通讯作者：
Chen Q
中科院分区：
文献类型：
--
作者：
Wang S;Zhao J;Chen Q
尚未很好地研究了不同林分年龄的土壤呼吸（RS）的特征。在这项研究中，我们确定了在中国中部元南高原的三个自然森林林（例如15岁，30岁和45岁）的三个自然森林林（例如15岁，30岁和45岁）下的驱动因子的时间变化。随着展台年龄的变化，没有发现一致的趋势。 RS的排名为30年龄> 45岁> 15岁。在三个地点中，15岁支架中的RS对土壤温度（TS）最敏感。但是，TS仅解释了现场RS的30-40％的季节性动态。土壤水含量（SW）是三个地点时间变化的主要控制因素。 SW解释了30岁的支架中RS的季节性变化的88-93％，在15岁的人群中为63.7-72.7％，在45岁的林分中为79.1-79.6％。此外，我们发现pH，可用的氮（AN），C/N和总磷（TP）对Rs的季节性变异产生了显着贡献。 SW与pH，总氮（TN），AN和TP显着相关，这表明SW可以通过改善土壤酸基碱特性和土壤质地以及增加土壤养分的可用性来影响RS。结果表明，除土壤水外，土壤特性（例如，pH，an，c/n和tp）对于控制自然林业不同林分年龄跨不同林分的RS的时间变化也很重要。
The characteristics of soil respiration (Rs) across different stand ages have not been well investigated. In this study, we identified temporal variation of Rs and its driving factors under three nature forest stands (e.g. 15-yr-old, 30-yr-old, and 45-yr-old) of Pinus yunnanensis in the Plateau of Mid-Yunnan, China. No consistent tendency was found on the change of Rs with the stand ages. Rs was ranked in the order of 30-yr-old > 45-yr-old >15-yr-old. Rs in 15-yr-old stand was the most sensitive to soil temperature (Ts) among the three sites. However, Ts only explained 30-40% of the seasonal dynamics of Rs at the site. Soil water content (Sw) was the major controlling factor of temporal variation at the three sites. Sw explained 88-93% of seasonal variations of Rs in the 30-yr-old stand, and 63.7-72.7% in the 15-yr-old and 79.1-79.6% in the 45-yr-old stands. In addition, we found that pH, available nitrogen (AN), C/N and total phosphorus (TP) contributed significantly to the seasonal variation of Rs. Sw was significantly related with pH, total nitrogen (TN), AN and TP, suggesting that Sw can affect Rs through improving soil acid-base property and soil texture, and increasing availability of soil nutrient. The results indicated that besides soil water, soil properties (e. g. pH, AN, C/N and TP) were also the important in controlling the temporal variations of Rs across different stand ages in the nature forestry.
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DOI：
10.1073/pnas.1222477110
发表时间：
2014-03-04
影响因子：
11.1
作者：
Friend, Andrew D.;Lucht, Wolfgang;Woodward, F. Ian
通讯作者：
Woodward, F. Ian
影响因子：
6.2
作者：
Flanagan, Lawrence B.;Sharp, Eric J.;Letts, Matthew G.
通讯作者：
Letts, Matthew G.
影响因子：
4.9
作者：
Keith, H;Jacobsen, KL;Raison, RJ
通讯作者：
Raison, RJ
影响因子：
4.8
作者：
Craine, Joseph M.;Morrow, Carl;Fierer, Noah
通讯作者：
Fierer, Noah
影响因子：
6.2
作者：
Gaumont-Guay, David;Black, T. Andrew;Nesic, Zoran
通讯作者：
Nesic, Zoran