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首页> 外文期刊>Canadian Journal of Soil Science >Carbon sequestration potential of cropland reforestation on the northern slope of the Tianshan Mountains
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Carbon sequestration potential of cropland reforestation on the northern slope of the Tianshan Mountains

机译：天山北坡耕地造林的固碳潜力

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The effect of land-use changes on soil carbon stocks has been an increasing concern in the context of global climate change. Through natural reforestation programs, abandoned cropland holds the potential of sequestering soil organic carbon (SOC) if the original forest could be recovered. In this study, we initially delineated the potential distribution of forest species on the north slope of the Tianshan Mountains using species distribution models. We then estimated the corresponding sequestration potential of SOC in the area delineated for reforestation. The deforestated area of a Picea schrenkiana forest converted to cropland (PSC) was defined by the potential and actual distributions of forest and cropland. The SOC contents of the forest and cropland soils were obtained through field sampling and laboratory analysis. We found that the area of the PSC was 26.77 x 10(5) ha, and the SOC loss (per unit area) derived from the conversion of forestland to cropland was 171.70 +/- 28.20 Mg ha(-1). The total SOC loss from the study area was 459.70 +/- 75.49 Tg. This result implies that continuing the reforestation programs being implemented in the study area would increase SOC by the same amount. Additionally, we also estimated the total amount of carbon that would be sequestered in the aboveground and underground forest biomass on former cropland.
机译：在全球气候变化的背景下，土地利用变化对土壤碳储量的影响日益引起人们的关注。通过自然的植树造林计划，如果可以恢复原始森林，则废弃的耕地具有隔离土壤有机碳的潜力。在本研究中，我们最初使用物种分布模型描述了天山北坡森林物种的潜在分布。然后，我们在划定的造林区域中估算了SOC的相应封存潜力。由森林和农田的潜在分布和实际分布定义了转化为农田的云杉云杉林的森林砍伐面积。通过田间采样和实验室分析获得森林和农田土壤的SOC含量。我们发现PSC的面积为26.77 x 10（5）ha，从林地转为耕地引起的SOC损失（每单位面积）为171.70 +/- 28.20 Mg ha（-1）。研究区域的总SOC损失为459.70 +/- 75.49 Tg。该结果表明，继续在研究区域实施的造林计划将使SOC增加相同的数量。此外，我们还估算了原耕地上的地上和地下森林生物量中固存的碳总量。

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