期刊
RESTORATION ECOLOGY
卷 29, 期 6, 页码 -出版社
WILEY
DOI: 10.1111/rec.13362
关键词
Alxa; fine root production; restoration; shrub; soil organic carbon; turnover rate
类别
资金
- National Natural Science Foundation of China [41530750, 41771101]
- Ecohydrology Research Team of the Chinese Academy of Sciences [Y929731]
The study found that the fine root production and turnover of Reaumuria songarica are closely related to soil water content, and their annual input of carbon and nitrogen contributes to the increase in soil organic C and N storage, promoting soil property heterogeneity.
Variations of fine root production and turnover of the dominant shrubs associated with soil carbon (C) and nutrients are of key importance for evaluating desert ecosystem sustainability. Here we examined fine root production and turnover rate of Reaumuria songarica in Alxa steppe desert of northwestern China through sequential coring, ingrowth cores, and mesh-bag methods, and then assessed soil C and nitrogen (N) stock and its correlation with fine root and leaf litter input. Results showed that fine root production and turnover rate were closely related to soil water content. Fine root production density and turnover rate of R. songarica were 386.8 g m(-2) and 2.4 yr(-1), respectively. Annually, fine root and leaf litter of R. songarica input 126.3 g C m(-2) and 4.7 g N m(-2) to soil. Soil organic C and N under shrub canopies increased substantially, which promoted the heterogeneity of soil properties and is considered as an important mechanism underlying the restoration of degraded sandy lands.
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