title: Soil Organic Carbon Pool and Its Chemical Composition in Phyllostachy pubescens Forests at Two Altitudes in Jian-ou City, China.
abstract: Phyllostachys pubescens forests play an important role in soil organic carbon (SOC) sequestration in terrestrial ecosystems. However, the estimation and mechanism of SOC sequestration by P. pubescens forests remain unclear. In this study, the effect of P. pubescens forest distribution with elevation was investigated at two altitude sites in Jian-ou City, Southeast China. SOC storage was estimated and its chemical composition was obtained via 13C-nuclear magnetic resonance (NMR), chemical classification, and spectral analysis. Results showed that the SOC contents and stocks were significantly higher at the high-altitude site than at the low-altitude site in the entire soil profile (0-60 cm). The C contents of the three combined humus forms exhibited similar responses to the elevation change, and all of these forms were higher at the high-altitude site than at the low-altitude site regardless of soil layer. However, the proportions of the three combined humus C showed no significant differences between the two altitudes. The results of 13C-NMR showed that the SOC chemical composition did not significantly vary with elevation as well. This finding was consistent with the E465/E665 of the loosely combined humus. Overall, the results suggested that altitude should be considered during regional SOC estimation and that altitude affected the quantity rather than the quality of the SOC under the same P. pubescens vegetation.
authors.affiliation: State Key Lab of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing, Jiangsu Province, China.|University of Chinese Academy of Sciences, Beijing, China.
authors.forename: Haibao
authors.initials: H
authors.lastname: Ji
authors.affiliation: State Key Lab of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing, Jiangsu Province, China.
authors.forename: Shunyao
authors.initials: S
authors.lastname: Zhuang
authors.affiliation: State Key Lab of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing, Jiangsu Province, China.
authors.forename: Zhaoliang
authors.initials: Z
authors.lastname: Zhu
authors.affiliation: China Bamboo Research Center, Chinese Academy of Forestry, Hangzhou, Zhejiang Province, China.
authors.forename: Zheke
authors.initials: Z
authors.lastname: Zhong
mesh_terms: D000531:Altitude; D002244:Carbon / Q000032:analysis*; D057965:Carbon Sequestration; D002681:China; D017753:Ecosystem; D065928:Forests; D009682:Magnetic Resonance Spectroscopy; D006109:Poaceae / Q000737:chemistry*; D012987:Soil / Q000737:chemistry*
chemical_list: D012987:Soil; D002244:Carbon