• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Catena: An Interdisciplinary Journal of Soil Science Hydrology-Geomorphology Focusing on Geoecology and Landscape Evolution >Effect of different vegetation cover on the vertical distribution of soil organic and inorganic carbon in the Zhifanggou Watershed on the loess plateau
【24h】

Effect of different vegetation cover on the vertical distribution of soil organic and inorganic carbon in the Zhifanggou Watershed on the loess plateau

机译：黄土高原纸坊沟流域不同植被覆盖对土壤有机碳和无机碳垂直分布的影响。

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

Understanding the carbon cycle of the terrestrial ecosystem and estimating the potential of carbon sequestration in soils requires adequate information on the relationship between soil organic carbon (SOC) and inorganic carbon (SIC). The vertical distribution and transformation of SOC and SIC under different types of vegetation and slope aspects in the Zhifanggou Watershed on the Loess Plateau were investigated. The distribution of SOC with soil depth in the 0-200 cm soil can be described by the exponential model. The theoretical initial accumulation of organic carbon at the litter/soil contact increased with the decrease in the C/N ratio of the litter from the vegetation and followed the order shrub > forest > grass. Compared to the shady slope, the low theoretical initial accumulation of organic carbon at the litter/soil contact resulted from the relatively small quantity of SOC formation by the decomposition of litter on the sunny slope. The variation tendency of SIC in the 0-50 cm is opposite to that of SOC. The transfer of the soil carbonate slowed down with the decrease in the soil water content (SWC), which was reflected by the significant negative correlation between SIC content and SWC (r = 0.400, p 0.001). Among the three different types of vegetation, shrub was most helpful for inorganic carbon sink because (1) more CaCO3 can be formed by precipitating with more Ca released from the decomposed shrub litter and (2) the dissolution and precipitation of the pedogenic carbonate is comparatively slow due to the relatively low SWC under shrub cover. (C) 2016 Elsevier B.V. All rights reserved.
机译：要了解陆地生态系统的碳循环并估算土壤中碳固存的潜力，就需要有关土壤有机碳（SOC）和无机碳（SIC）之间关系的充分信息。黄土高原纸坊沟流域不同植被类型和坡度条件下，SOC和SIC的垂直分布和变化规律研究。 SOC在0-200 cm土层中随土层深度的分布可以通过指数模型来描述。凋落物/土壤接触处有机碳的理论初始积累量随植被中凋落物C / N比的降低而增加，并且依次为灌木>森林>草丛。与阴坡相比，凋落物/土壤接触处有机碳的理论初始累积量低，这是由于晴天斜坡上凋落物的分解导致相对较少的SOC形成所致。 SIC在0-50 cm处的变化趋势与SOC相反。随着土壤含水量（SWC）的降低，土壤碳酸盐的转移速度减慢，这反映在SIC含量与SWC之间显着的负相关关系（r = 0.400，p <0.001）。在三种不同类型的植被中，灌木对无机碳汇最有帮助，因为（1）分解的灌木丛中释放出更多的Ca可以沉淀形成更多的CaCO3，（2）成岩碳酸盐的溶解和沉淀相对较多由于灌木覆盖下的SWC相对较低，因此速度较慢。 （C）2016 Elsevier B.V.保留所有权利。

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