天山北坡雪岭云杉林地开垦的土壤有机碳损失估算

Abstract

PDF HTML阅读 XML下载 导出引用 引用提醒 天山北坡雪岭云杉林地开垦的土壤有机碳损失估算 DOI: 10.5846/stxb201606191191 作者: 作者单位: 新疆大学资源与环境科学学院,新疆大学资源与环境科学学院,新疆大学资源与环境科学学院 作者简介: 通讯作者: 中图分类号: 基金项目: 国家自然科学基金资助项目（41361098，31500398） Estimation of soil organic carbon loss from Picea schrenkiana forest to farmland in the northern Tianshan Mountains Author: Affiliation: College of Resources and Environment Science, Xinjiang University,College of Resources and Environment Science, Xinjiang University,College of Resources and Environment Science, Xinjiang University Fund Project: 摘要 | 图/表 | 访问统计 | 参考文献 | 相似文献 | 引证文献 | 资源附件 | 文章评论 摘要:在全球变暖的背景下，由土地利用变化导致的土壤碳库的变化已经受到越来越多的关注。首先采用物种分布模型预测了天山北坡雪岭云杉林的潜在分布，其次估计了与被开垦为农田的雪岭云杉林面积（PSC）以及由林地开垦为农田造成的有机碳损失。PSC分别由雪岭云杉林的现实分布、潜在分布和农田的现实分布确定。云杉林地和农田的土壤有机碳含量由野外采样和实验室分析获得。研究发现，PSC面积为2.68×106hm2，被开垦为农田的雪岭云杉林土壤有机碳的损失为171.7 t/hm2；研究区总有机碳的损失为459.70Tg。结果表明，研究区的林地恢复和重建项目将会使土壤有机碳储量有所增加，且土壤表层的增加量多于深层。 Abstract:The effect of land-use changes on soil carbon stocks is an increasing concern in the context of global climate warming. In this study, we initially delineated the deforestation area of a Picea schrenkiana forest cultivated to cropland (PSC) at the north slope of the Tianshan Mountains. We then estimated the corresponding soil organic carbon (SOC) loss during the land-use change. The PSC was estimated by the potential, actual distributions of forest and cropland. The SOC content of the forest and cropland soils was obtained through field sampling and laboratory analysis. We found that the area of the PSC was 2.68×106 hm2, and the SOC loss (per unit area) caused by the cultivation of forest to cropland was 171.7 t/hm2, correspondingly. The total SOC loss in the study area was 459.70 Tg. This result implies that continuing the afforestation and reforestation programs currently implemented in the study area would increase the SOC. In addition, we found that the potential SOC sequestration is expected to increase to a greater extent in the upper soil layers than the lower layers. 参考文献 相似文献 引证文献