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首页> 外文期刊>Ecological research >Soil organic carbon stock and chemical composition along an altitude gradient in the Lushan Mountain, subtropical China
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Soil organic carbon stock and chemical composition along an altitude gradient in the Lushan Mountain, subtropical China

机译：亚热带庐山土壤有机碳储量及化学组成沿海拔梯度的变化

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摘要

Soil organic carbon (SOC) stock in mountain ecosystems is highly heterogeneous because of differences in soil, climate, and vegetation with elevation. Little is known about the spatial distribution and chemical composition of SOC along altitude gradients in subtropical mountain regions, and the controlling factors remain unclear. In this study, we investigated the changes in SOC stock and chemical composition along an elevation gradient (219, 405, 780, and 1268 m a.s.l.) on Lushan Mountain, subtropical China. The results suggested that SOC stocks were significantly higher at high altitude sites (1268 m) than at low altitude ones (219, 405, and 780 m), but the lower altitude sites did not differ significantly. SOC stocks correlated positively with mean annual precipitation but negatively with mean annual temperature and litter C/N ratio. The variations in SOC stocks were related mainly to decreasing temperature and increasing precipitation with altitude, which resulted in decreased litter decomposition at high altitude sites. This effect was also demonstrated by the chemical composition of SOC, which showed lower alkyl C and higher O-alkyl C contents at high altitude sites. These results will improve the understanding of soil C dynamics and enhance predictions of the responses of mountain ecosystem to global warming under climate change.
机译：山区生态系统中的土壤有机碳（SOC）高度异质，因为土壤，气候和植被随海拔的不同而不同。在亚热带山区，SOC沿高度梯度的空间分布和化学成分知之甚少，其控制因素仍不清楚。在这项研究中，我们调查了亚热带芦山山沿海拔高度（219、405、780和1268 m a.s.l.）的SOC储量和化学成分的变化。结果表明，高海拔地区（1268 m）的SOC数量明显高于低海拔地区（219、405和780 m）的SOC，但是低海拔地区的SOC存量没有显着差异。 SOC存量与年平均降水量呈正相关，而与年平均温度和凋落物碳氮比呈负相关。 SOC储量的变化主要与温度降低和降水量随海拔升高有关，从而导致高海拔地区的凋落物分解减少。 SOC的化学成分也证明了这种作用，在高海拔地区显示出较低的烷基C和较高的O-烷基C含量。这些结果将增进对土壤碳动态的理解，并增强对气候变化下山区生态系统对全球变暖的反应的预测。

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  • 来源
    《Ecological research》 |2014年第3期|433-439|共7页
  • 作者

    Baoming Du; Hongzhang Kang; Jukka Pumpanen; Penghua Zhu; Shan Yin; Qin Zou; Zhe Wang; Fanqian Kong; Chunjiang Liu;

  • 作者单位

    School of Agriculture and Biology and Research Centre for Low-Carbon Agriculture, Shanghai Jiao Tong University, Dongchuan Rd. 800, Shanghai 200240, People's Republic of China;

    School of Agriculture and Biology and Research Centre for Low-Carbon Agriculture, Shanghai Jiao Tong University, Dongchuan Rd. 800, Shanghai 200240, People's Republic of China,Key Laboratory of Urban Agriculture (South), Ministry of Agriculture, Dongchuan Rd. 800, Shanghai 200240, People's Republic of China;

    Department of Forest Sciences, University of Helsinki, P.O. Box 27, 00014 Helsinki, Finland;

    School of Agriculture and Biology and Research Centre for Low-Carbon Agriculture, Shanghai Jiao Tong University, Dongchuan Rd. 800, Shanghai 200240, People's Republic of China,Key Laboratory of Urban Agriculture (South), Ministry of Agriculture, Dongchuan Rd. 800, Shanghai 200240, People's Republic of China;

    School of Agriculture and Biology and Research Centre for Low-Carbon Agriculture, Shanghai Jiao Tong University, Dongchuan Rd. 800, Shanghai 200240, People's Republic of China,Key Laboratory of Urban Agriculture (South), Ministry of Agriculture, Dongchuan Rd. 800, Shanghai 200240, People's Republic of China;

    Nature Reserve of Lushan Jiangxi, Henan Rd. 600, Jiujiang 332900, People's Republic of China;

    Shanghai Forestry Station, Hutai Rd. 1053, Shanghai 200072, People's Republic of China;

    Nature Reserve of Lushan Jiangxi, Henan Rd. 600, Jiujiang 332900, People's Republic of China;

    School of Agriculture and Biology and Research Centre for Low-Carbon Agriculture, Shanghai Jiao Tong University, Dongchuan Rd. 800, Shanghai 200240, People's Republic of China,Key Laboratory of Urban Agriculture (South), Ministry of Agriculture, Dongchuan Rd. 800, Shanghai 200240, People's Republic of China;

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  • 正文语种 eng
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  • 关键词

    Soil organic carbon; Chemical composition; Vegetation type; Mountain ecosystem; Subtropical China;

    机译：土壤有机碳;化学成分;植被类型;山区生态系统;亚热带中国;

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