Surface soil organic carbon in temperate and subtropical oriental oak stands of East China

Surface soil organic carbon in temperate and subtropical oriental oak stands of East China
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华东温带和亚热带栎林表层土壤有机碳

DOI:
10.1139/cjfr-2015-0324
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发表时间:
2016-02
影响因子:
2.2
通讯作者:
Zhou, Pisheng
Zhou, Pisheng
中科院分区:
农林科学3区
文献类型:
--
作者:
Yu, Wenjuan;Fahey, Timothy J.;Kang, Hongzhang;Zhou, Pisheng

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森林生态系统中含有大量的土壤有机碳,是土壤地球化学循环的重要组成部分,对环境变化十分敏感。我们使用核磁共振(NMR)光谱和元素和同位素组成相结合,以研究土壤性质和气候因素的影响,在7个东方栎(Quercus variabilis Blume)森林网站安排在11 o纬度梯度在中国东部的有机和表面矿物层的SOC分解的数量和程度。缺乏Oa的视野,两个最南端的网站包含较低的SOC在森林地面水平,但在其他方面,纬度的趋势并不一致。0-10 cm矿物层土壤有机碳储量沿梯度沿着变化趋势不明显,与粘粒+粉粒含量呈负相关。基于较高的烷基/O-烷基(A/O)比和烷基/甲氧基(A/M)比,0-10 cm深度的SOC在三种不同的有机质中的分解程度相对较高。
Forest ecosystems contain large amounts of soil organic carbon (SOC), which is a major component of biogeochemical cycles that may be sensitive to environmental change. We used a combination of nuclear magnetic resonance (NMR) spectroscopy and elemental and isotopic composition to examine the influence of soil properties and climatic factors on the quantity and degree of decomposition of SOC for organic and surface mineral horizons in seven oriental oak (Quercus variabilis Blume) forest sites arranged across a 11o latitudinal gradient in East China. Lacking Oa horizons, the two southernmost sites contained lower amounts of SOC in the forest floor horizon, but otherwise, latitudinal trends were not consistent. The SOC stock in the 0–10 cm mineral horizon exhibited no clear trend along the gradient and had a negative association with clay + silt content. Based on a higher alkyl/O-alkyl (A/O) ratio and alkyl/methoxyl (A/M) ratio, the SOC at the 0–10 cm depth appeared to be relatively more decomposed in three...
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