• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Forest Ecology and Management >Soil organic carbon stocks in three Canadian agroforestry systems: From surface organic to deeper mineral soils
【24h】

Soil organic carbon stocks in three Canadian agroforestry systems: From surface organic to deeper mineral soils

机译：土壤有机碳股在三个加拿大制剂系统中：从表面有机到更深的矿物土壤

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Our understanding of the effect of agroforestry systems on soil organic carbon (SOC) is largely limited to the upper layer of the mineral soil, while LFH (litter, partially decomposed litter and humus) and deeper soil layers are poorly studied. In this study, the effects of three different agroforestry systems (hedgerow, shelterbelt, and silvopasture) and their component land-cover types (treed area and adjacent herbland) on SOC stock in LFH and mineral soil layers (0-75 cm) were investigated across 36 sites in central Alberta, Canada. The SOC stock of mineral soil (0-75 cm) was not affected by agroforestry systems but by land-cover type. The treed area had greater (p & 0.001) SOC in the 0-75 cm mineral soil (25.5 kg C m(-2)) than the herbland (19.4 kg C m(-2)), driven by the greater (p & 0.001) SOC level in the top 0-30 cm rather than that in the deeper layers (30-75 cm). Within the treed area, the silvopasture system that was dominated by broad-leaf deciduous trees had 56-70% more SOC in the 0-10 cm soil than in the hedgerow and shelterbelt systems. The SOC stock in the 0-10 cm layer was positively (p = 0.025) related to the C stock of the overlying LFH layer in the silvopasture system. These results together with the 22-24% higher dissolved organic carbon (DOC) concentration in the silvopasture than in the other systems suggest that the greater SOC stock in the 0-10 cm mineral soil could be attributed to the higher rates of translocation of DOC from the LFH in the silvopasture than that in shelterbelt or hedgerow. We conclude that SOC stock in the top mineral soil (e.g., 0-30 cm) is more responsive to changes in land-cover type and the LFH layer plays an important role in increasing SOC stock in the surface mineral soil of the agroforestry systems in central Alberta.
机译：我们对土壤有机碳（SoC）对土壤有机碳（SoC）的影响的理解主要限于矿物质的上层，而LFH（垃圾，部分分解的垃圾和腐殖质）和更深的土壤层研究得很差。在这项研究中，研究了三种不同的农业制剂系统（HEDGEROW，防护罩，硅胶）及其组分土地覆盖类型（TREED区域和相邻HERBLAND）对LFH和矿物土壤层（0-75厘米）的SOC库存影响（0-75厘米）的影响在加拿大艾伯塔省中部的36个站点。矿物土壤（0-75厘米）的SOC库存不受农业制剂的影响，但通过陆地覆盖类型。在0-75cm矿物土壤中（25.5 kg C m（-2））中的较大（p＆amp; 0.001）SoC的较大（p＆amp; 0.001）的SoC（19.4kg C m（-2）），由较大的驱动（P＆amp; LT; 0.001）SOC水平位于0-30厘米，而不是更深层（30-75cm）。在特雷德地区，在0-10厘米的土壤中，由阔叶落叶树占有56-70％的SoC，比HEDGEROW和防护胶系统更多。 0-10cm层中的SoC库存与覆盖LFH层中的覆盖LFH层中的C库存相关（p = 0.025）。这些结果与在硅渣中的22-24％较高的溶解有机碳（Doc）浓度一起，表明0-10cm矿物土壤中的大型SoC库存可能归因于Doc的易位率较高从淤泥或树篱中的Silvopasture中的LFH。我们得出结论，顶部矿物土壤（例如，0-30cm）的SoC库存对陆地覆盖类型的变化更敏感，LFH层在增加农林素系统的表面矿物土壤中的SOC储量中起重要作用艾伯塔省中央。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号