...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>European Journal of Soil Science >Soil organic and inorganic carbon and stable carbon isotopes in the Yanqi Basin of northwestern China
【24h】

Soil organic and inorganic carbon and stable carbon isotopes in the Yanqi Basin of northwestern China

机译：西北the盆地的土壤有机碳和无机碳及稳定碳同位素

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

Soil organic carbon (SOC) and soil inorganic carbon (SIC) are important reservoirs of carbon in terrestrial ecosystems. Assessments of both SOC and SIC are lacking in arid regions. We carried out a survey in central Xinjiang, the Yanqi Basin, to evaluate the dynamics of SOC and SIC. Twenty-one soil profiles were sampled from three land types: desert, shrub and agricultural soils. We determined SOC and SIC and the stable carbon isotope compositions (C-13). Our data showed a decrease with depth for SOC in all soil profiles but an increase for SIC except in the desert soils. Both SOC and SIC stocks (over the 0-30-cm depth) were least in the desert soils (1.0 +/- 0.3 and 4.0 +/- 0.8 kg C m(-2) for SOC and SIC, respectively) but greatest in the agricultural soils (4.6 +/- 0.6 and 11.0 +/- 2.0 kg C m(-2) for SOC and SIC, respectively). Total soil carbon stocks at 0-100 cm were 11.6 +/- 4.8, 45.1 +/- 10.4 and 51.2 +/- 5.6 kg C m(-2) in the desert soils, shrub soils and agricultural soils, respectively. On average, SIC accounted for more than 80% of the total carbon in this region. There were no significant differences in C-13 of SOC between land-use types. In contrast, the C-13 of SIC was different: desert soils (-0.6 parts per thousand) > shrub soils (-2.2 parts per thousand) > agricultural soils (-3.4 parts per thousand). The depleted C-13 in SIC in the agricultural soils indicates enhancement of pedogenic carbonate by cropping. Our study suggests that converting shrub land to agricultural land in arid regions may lead to an increase not only in SOC stock, but also in SIC stock.
机译：土壤有机碳（SOC）和土壤无机碳（SIC）是陆地生态系统中重要的碳储库。干旱地区缺乏对SOC和SIC的评估。我们在Xinjiang中盆地新疆中部进行了一项调查，以评估SOC和SIC的动态。从以下三种土地类型中取样了二十一种土壤剖面：沙漠，灌木和农业土壤。我们确定了SOC和SIC以及稳定的碳同位素组成（C-13）。我们的数据显示，在所有土壤剖面中，SOC随深度的增加而减少，但除沙漠土壤外，SIC的增加。在沙漠土壤中，SOC和SIC储量（在0-30 cm深度上）最少（SOC和SIC分别为1.0 +/- 0.3和4.0 +/- 0.8 kg C m（-2）），但最大农业土壤（SOC和SIC分别为4.6 +/- 0.6和11.0 +/- 2.0 kg C m（-2））。在沙漠土壤，灌木土壤和农业土壤中，0-100 cm处的土壤总碳储量分别为11.6 +/- 4.8、45.1 +/- 10.4和51.2 +/- 5.6 kg C m（-2）。平均而言，SIC占该地区总碳的80％以上。土地利用类型之间SOC的C-13没有显着差异。相比之下，SIC的C-13不同：沙漠土壤（-0.6千分之一）>灌木土壤（-2.2千分之一）>农业土壤（-3.4千分之一）。农业土壤中SIC中C-13的减少表明耕作可提高土壤成岩碳酸盐的含量。我们的研究表明，在干旱地区将灌木地转变为农业用地不仅会导致SOC库存增加，还会导致SIC库存增加。

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