| 中国东部森林土壤腐殖碳组分纬度格局及其影响因素（英文） |
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| 引用本文： | 徐丽,王春燕,朱剑兴,高扬,李美玲,吕瑜良,于贵瑞,何念鹏.中国东部森林土壤腐殖碳组分纬度格局及其影响因素（英文）[J].地理学报(英文版),2018(1). |
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| 作者姓名： | 徐丽 王春燕 朱剑兴 高扬 李美玲 吕瑜良 于贵瑞 何念鹏 |
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| 摘 要： | Soil humic carbon is an important component of soil organic carbon(SOC) in terrestrial ecosystems. However, no study to date has investigated its geographical patterns and the main factors that influence it at a large scale, despite the fact that it is critical for exploring the influence of climate change on soil C storage and turnover. We measured levels of SOC, humic acid carbon(HAC), fulvic acid carbon(FAC), humin carbon(HUC), and extractable humus carbon(HEC) in the 0–10 cm soil layer in nine typical forests along the 3800-km North-South Transect of Eastern China(NSTEC) to elucidate the latitudinal patterns of soil humic carbon fractions and their main influencing factors. SOC, HAC, FAC, HUC, and HEC increased with increasing latitude(all P0.001), and exhibited a general trend of tropical subtropical temperate. The ratios of humic C fractions to SOC were 9.48%–12.27%(HAC), 20.68%–29.31%(FAC), and 59.37%–61.38%(HUC). Climate, soil texture, and soil microbes jointly explained more than 90% of the latitudinal variation in SOC, HAC, FAC, HEC, and HUC, and interactive effects were important. These findings elucidate latitudinal patterns of soil humic C fractions in forests at a large scale, and may improve models of soil C turnover and storage.
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