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首页> 外文期刊>Journal of Geophysical Research. Biogeosciences >Does Land Use Age Influence Carbon Cycling in the Tibetan Plateau?
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Does Land Use Age Influence Carbon Cycling in the Tibetan Plateau?

机译：土地使用年龄是否影响藏高原循环循环？

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摘要

Although substantial information had been generated on the effects of land use change on soil organic carbon (SOC) and total nitrogen (TN) storage, studies are absent on multifactorial effects of land use types, land use age, and elevation on SOC and TN storage. SOC and TN were therefore investigated in 30 field sites comprising natural forests, planted forests, shrub, and grasslands. SOC and TN stocks differed and correlated significantly with land use age; the C stocks correlates significantly with land use change compared the TN stocks. However, there was no relation between the C and N stocks with elevation, implying that SOC and TN are solely dependent on land use age. SOC sequestration potentials of the sampled ecosystems were 345.86, 293.19, 266.45, and 251.23 t ha~(-1) for the natural forests, planted forests, shrub, and grasslands with total mean value of 289.18 t·ha~(-1) (1,060.42 t·ha~(-1) CO_2-eq). A significant SOC stock loss (17.96%, 29.80%, and 37.66%) occurred in converting natural forests to planted forests, shrub, and grasslands, whereas gains (27.36%, 14.31%, and 5.71%) would occur in reconverting grassland to natural forests, planted forests, and shrublands. Therefore, the C that was lost during deforestation and conversion of natural forests into other land use types could not match the carbon gains thereafter. Our results suggest that land use change and land use age have influenced soil C and N stocks. Moreover, natural forests are better in ecological conservation and restoration of degraded lands. This study provides baseline information for C and N management in ecologically restored and degraded lands.
机译：虽然已经在土地利用变化对土壤有机碳（SoC）和总氮气（TN）储存的影响下产生了大量信息，但在土地利用类型，土地利用年龄和SOC和TN存储上的高度的情况下，研究不存在研究。因此，在包含天然森林，种植森林，灌木和草原的30个现场部位中研究了SOC和TN。 SOC和TN库存与土地使用年龄有显着差异和相关性;与土地利用变化相比，C库存与TN股票相比显着相关。但是，C和N股具有高度的关系，暗示SoC和TN完全取决于土地使用年龄。采样生态系统的SOC封存电位为天然森林，种植森林，灌木和草原的345.86,293.19,266.45和251.23 T ha〜（-1），总平均值为289.18 t·ha〜（-1）（ 1,060.42 t·ha〜（-1）co_2-eq）。将天然森林转化为种植森林，灌木和草原的自然森林，在将草原重新调整到自然时，发生了重大的Soc库存损失（17.96％，29.80％和37.66％）发生在种植森林，灌木和草原上，而是发生（27.36％，14.31％和5.71％）森林，种植森林和灌木丛。因此，在森林砍伐和转化到其他土地利用类型的砍伐和转化过程中丧失的C可能与此后的碳收益不匹配。我们的研究结果表明，土地利用变化和土地利用年龄影响了土壤C和N股。此外，天然森林在生态保护和退化土地上更好。本研究为生态恢复和退化的土地提供了C和N管理的基线信息。

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  • 作者

    Meta Francis Justine; Kaiwen Pan; Nambajimana Jean de Dieu; Fidele Karamage; Zebene Tadesse; Bikram Pandey; Wanqin Yang; Fuzhong Wu; Olusanya Abioùdun Olatunji; Nirdesh Nepal; Friday Uchenna Ochege; Akash Tariq; Lin Zhang; Xiaoming Sun;

  • 作者单位

    CAS Key Laboratory of Mountain Ecological Restoration and Bioresource Utilization and Ecological Restoration Biodiversity Conservation Key Laboratory of Sichuan Province Chengdu Institute of Biology Chinese Academy of Sciences Chengdu China;

    CAS Key Laboratory of Mountain Ecological Restoration and Bioresource Utilization and Ecological Restoration Biodiversity Conservation Key Laboratory of Sichuan Province Chengdu Institute of Biology Chinese Academy of Sciences Chengdu China;

    International College University of Chinese Academy of Sciences Beijing China;

    International College University of Chinese Academy of Sciences Beijing China;

    CAS Key Laboratory of Mountain Ecological Restoration and Bioresource Utilization and Ecological Restoration Biodiversity Conservation Key Laboratory of Sichuan Province Chengdu Institute of Biology Chinese Academy of Sciences Chengdu China;

    CAS Key Laboratory of Mountain Ecological Restoration and Bioresource Utilization and Ecological Restoration Biodiversity Conservation Key Laboratory of Sichuan Province Chengdu Institute of Biology Chinese Academy of Sciences Chengdu China;

    College of Life Sciences Taizhou University Taizhou China;

    School of Geographical Sciences Fujian Normal University Fuzhou China;

    CAS Key Laboratory of Mountain Ecological Restoration and Bioresource Utilization and Ecological Restoration Biodiversity Conservation Key Laboratory of Sichuan Province Chengdu Institute of Biology Chinese Academy of Sciences Chengdu China;

    International College University of Chinese Academy of Sciences Beijing China;

    State Key Laboratory of Desert and Oasis Ecology Xinjiang Institute of Ecology and Geography Chinese Academy of Sciences Urumqi China;

    International College University of Chinese Academy of Sciences Beijing China;

    CAS Key Laboratory of Mountain Ecological Restoration and Bioresource Utilization and Ecological Restoration Biodiversity Conservation Key Laboratory of Sichuan Province Chengdu Institute of Biology Chinese Academy of Sciences Chengdu China;

    CAS Key Laboratory of Mountain Ecological Restoration and Bioresource Utilization and Ecological Restoration Biodiversity Conservation Key Laboratory of Sichuan Province Chengdu Institute of Biology Chinese Academy of Sciences Chengdu China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 生物分布与生物地理学;
  • 关键词

    Does Land Use; Age Influence Carbon; Cycling;

    机译：土地使用;年龄影响碳;骑自行车;

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