• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Ecological engineering: The Journal of Ecotechnology >The impact of desertification on carbon and nitrogen storage in the desert steppe ecosystem
【24h】

The impact of desertification on carbon and nitrogen storage in the desert steppe ecosystem

机译：荒漠化对荒漠草原生态系统碳氮存储的影响

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

Desertification is one of the most severe types of land degradation. This study quantified the impact of five different desertification regimes (potential (PD), light (LD), moderate (MD), severe (SD), and very severe (VSD)) on a desert steppe ecosystem in northern China, and investigated the changes in carbon (C) and nitrogen (N) storage in relation to land desertification. The C and N content in different stages of desertification were significantly different, while there was no obvious variation of C and N in different plant components as desertification progressed. Changes in soil C and N were not in accordance with plant succession, with the soil being more sensitive to desertification than the ground vegetation. When the VSD stage was compared with the PD stage, desertification resulted in the total C and N storage in plants decreasing by 97.3% and 96.8%, respectively, and in the 0-40 cm soil layer decreasing by 58.5%, and 76.0%, respectively. The highest C and N storage levels in the desert steppe ecosystem were 1291.93 g m(-2), and 142.10 g m(-2) in the PD stage, and the lowest levels were 505.14 and 33.41 g m(-2) in the VSD stage. C and N losses through desertification were 786.79 and 108.69 g m(-2), respectively. Therefore, it was confirmed that desertification results in soil degradation and seriously decreases soil potential productivity. (C) 2015 Elsevier B.V. All rights reserved.
机译：荒漠化是最严重的土地退化类型之一。这项研究量化了五种不同的荒漠化制度（潜在（PD），轻度（LD），中度（MD），严重（SD）和非常严重（VSD））对中国北方荒漠草原生态系统的影响，并调查了与土地荒漠化有关的碳（C）和氮（N）存储量的变化。荒漠化不同阶段的碳，氮含量存在显着差异，而随着荒漠化的进行，不同植物组成中碳，氮含量无明显变化。土壤碳和氮的变化与植物演替不符，土壤对荒漠化的敏感性高于地面植被。当将VSD阶段与PD阶段进行比较时，荒漠化导致植物中的总碳和氮存储量分别减少97.3％和96.8％，而0-40 cm土壤层中的总碳和氮存储量分别减少58.5％和76.0％，分别。荒漠草原生态系统中最高的C和N储存水平在PD阶段为1291.93 g m（-2），在PD阶段为142.10 g m（-2），而在VSD阶段最低的水平为505.14和33.41 g m（-2）。通过荒漠化造成的碳和氮损失分别为786.79和108.69 g m（-2）。因此，证实了荒漠化导致土壤退化并严重降低了土壤潜在生产力。 （C）2015 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