Lager scale ecological restoration practices are increasing soil organic carbon (SOC) stocks. Meta‐analysis is by far the most widely applied technique for describing SOC at large spatial scales, but there is a lack of field‐based investigations on a series of individual watersheds. In this study, a watershed transect of six watersheds distributed in a hilly and gully area of the Loess Plateau was investigated in order to achieve sustainable practices. The results indicate that ecological restoration practices significantly increased SOC stocks to varying degrees (p < 0.05). Grasslands were associated with the largest SOC stocks (39.42 ± 22.21 t hm⁻²), which were larger than the SOC stocks of artificial immature forest (<20 years) (26.58 ± 14.32 t hm⁻²) in the 50 cm soil profile. However, in the long term, afforestation seems to increase SOC stocks to the level of secondary forest, 81.15 ± 4.69 t hm⁻², in a suitable environment. Appropriate land use management is also an effective approach to improving soil C sequestration capacity. SOC stocks were measured as 34.11 ± 7.66 t hm⁻² in abandoned terraced farmland, which was similar to the grassland SOC stocks. Soil and plant factors contributed approximately 60% to the variation in the spatial distribution of SOC stocks at 0–50 cm; their contributions increased and diminished with increasing soil depth, respectively. This study indicates naturally restored grassland and engineering practices are suitable on the Loess Plateau by investigating a watershed transect and enhances our understanding of the comprehensive contributions of environmental factors to the spatial distribution of SOC stocks on a large spatial scale.

中文翻译：

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黄土高原与生态恢复做法相关的受调查流域样地土壤有机碳储量

更大的生态恢复做法正在增加土壤有机碳（SOC）的储量。迄今为止，荟萃分析是在大空间尺度上描述SOC的最广泛应用的技术，但是缺乏对一系列单个流域的基于实地的研究。在这项研究中，对分布在黄土高原丘陵和沟壑区的六个集水区的一个集水区横断面进行了研究，以实现可持续的实践。结果表明，生态恢复措施在不同程度上显着增加了SOC储量（p  <0.05）。草地上的SOC总量最大（39.42±22.21 t hm ^-2），大于人工未成熟森林（<20年）的SOC总量（26.58±14.32 t hm ^-2））放在50厘米的土壤剖面中。但是，从长远来看，在合适的环境下，造林似乎会使SOC储量增加到次生林的水平，即81.15±4.69 t hm ^-2。适当的土地利用管理也是提高土壤固碳能力的有效途径。SOC存量为34.11±7.66 t hm ^-2在废弃的梯田中，类似于草地SOC的库存。在0〜50 cm处，土壤和植物因子对SOC储量空间分布的变化贡献了大约60％。它们的贡献分别随着土壤深度的增加而增加和减少。这项研究表明，通过调查分水岭样带，自然恢复的草地和工程实践在黄土高原上是合适的，并增强了我们对环境因素在较大空间尺度上对SOC储量空间分布的综合贡献的理解。