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首页> 外文期刊>土壤圈（英文版） >Soil Organic Carbon Content and Distribution in a Small Landscape of Dongguan, South China
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Soil Organic Carbon Content and Distribution in a Small Landscape of Dongguan, South China

机译：东莞小景观中土壤有机碳含量及分布

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摘要

Global warming has become an increasing concern, and using soil as a carbon sink to sequester carbon dioxide has attracted much attention in recent years. In this study, soil organic carbon (SOC) content and organic carbon density were estimated based on a soil survey of a small landscape in Dongguan, South China, with spatial heterogeneity of SOC distribution and the impacts of land-use patterns on soil organic carbon content assessed. Field sampling was carried out based on a 150 m × 150 m grid system overlaid on the topographic map of the study area and samples were collected in three 20-cm layers to a depth of 60 cm. Spatial variability in the distribution of SOC was assessed using the Kruskal-Wallis test. Results showed that SOC in the topsoil layer (0-20 cm) was not much higher or even lower in some sites than the underlying layers, and except for the two sites covered with natural woodland, it did not exhibit a pronounced vertical gradient. The difference in both horizontal and vertical distribution of SOC was not statistically significant. However,in the topsoil layer among land-use/land-cover patterns, significant differences (P ≤ 0.05) in SOC distribution existed,indicating that management practices had great impact on SOC content. SOC storage in the study area to a depth of 20,40, and 60 cm was estimated as 2.13 × 106 kg, 3.46 × 106 kg, and 4.61 × 106 kg, respectively.
机译：全球变暖已成为日益关注的问题，近年来，使用土壤作为碳汇来隔离二氧化碳已引起了广泛关注。本研究基于对中国南方东莞小景观的土壤调查，土壤有机碳分布的空间异质性以及土地利用方式对土壤有机碳的影响，估算了土壤有机碳含量和有机碳密度。内容评估。根据覆盖在研究区域地形图上的150 m×150 m网格系统进行野外采样，并在三个20 cm的层中收集样品，深度为60 cm。使用Kruskal-Wallis检验评估SOC分布的空间变异性。结果表明，表土层（0-20厘米）中的SOC在某些位置上并不比其下层高或什至更低，并且除两个被天然林地覆盖的位置外，它没有表现出明显的垂直梯度。 SOC的水平和垂直分布差异均无统计学意义。然而，在土地利用/土地覆被方式之间的表土层中，SOC的分布存在显着差异（P≤0.05），表明管理实践对SOC含量有很大的影响。研究区的SOC储存深度为20,40和60 cm，分别为2.13×106 kg，3.46×106 kg和4.61×106 kg。

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