• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Soil Research >Distribution of organic carbon and nitrogen in soil aggregates of aspen (Populus simonii Carr.) woodlands in the semi-arid Loess Plateau of China.
【24h】

Distribution of organic carbon and nitrogen in soil aggregates of aspen (Populus simonii Carr.) woodlands in the semi-arid Loess Plateau of China.

机译：中国半干旱黄土高原白杨林土壤团聚体中有机碳和氮的分布

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

The distribution and turnover of organic carbon (OC) and nitrogen (N) associated with aggregates in soils is critical for understanding the behaviour of C and N in soils. We collected soil samples from aspen (Populus simonii Carr.) woodland in the semi-arid Loess Plateau of China to investigate the distribution of aggregate-associated OC and N. The distribution of aggregates and aggregate-associated OC and N were measured, and OC and N stocks in each aggregate fraction were calculated. Across the sites and soil depths, microaggregates and the silt+clay fraction dominated the distribution of soil aggregates, which varied with site. Organic C and N accumulated mainly in the macro- and micro-aggregate fractions in loamy soils but in the silt+clay fractions in sandy soils. The OC and N stocks in the bulk soil of aspen woodland were determined by the OC and N stocks associated with silt+clay fraction. The results of this study indicate that soil texture may play an important role in assessing the distributions of soil OC and N in both bulk soils and aggregate size fractions in aspen woodland, especially in semi-arid regions. Furthermore, the establishment of aspen woodland would result in greater accumulation of OC and N in loam soils than in sandy soils.
机译：与团聚体相关的有机碳（OC）和氮（N）的分布和周转对于理解土壤中C和N的行为至关重要。我们从中国半干旱黄土高原的白杨（Populus simonii Carr。）林地收集了土壤样本，以研究骨料相关的OC和N的分布。测量了骨料和骨料相关的OC和N的分布，并测定了OC计算每个聚合部分中的N个库存。在整个场地和土壤深度中，微团聚体和淤泥+粘土分数支配着土壤聚集体的分布，其随位置而变化。有机碳和氮主要积累在壤土中的宏观和微观聚集体中，但在沙质土壤中的淤泥+粘土中却积累着。白杨林地土壤中的OC和N储量由与粉土+粘土分数相关的OC和N储量确定。这项研究的结果表明，土壤质地可能在评估白杨林尤其是半干旱地区的散装土壤和骨料粒度分数中的土壤OC和N的分布中起重要作用。此外，建立白杨林地将导致壤土中的OC和N积累比沙质土壤更大。

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