| The evaluation of carbon sequestration potential in farmland ecosystem in Yanhe River catchment using natural ecosystem as a reference |
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| DOI：10.7606/j.issn.1000-7601.2010.05.39 |
| Key Words: carbon sequestration potential soil organic carbon density soil organic carbon and environment |
| Author Name | Affiliation | | YANG Shangbin | College of Resources and Environment, Northwest A & F University, Yangling, Shannxi 712100, China
Institute of Soil and Water Conservation, CAS and MWR, Yangling, Shannxi 712100, China | | WEN Zhongming | College of Resources and Environment, Northwest A & F University, Yangling, Shannxi 712100, China
Institute of Soil and Water Conservation, CAS and MWR, Yangling, Shannxi 712100, China | | ZHANG Jia | College of Resources and Environment, Northwest A & F University, Yangling, Shannxi 712100, China
Institute of Soil and Water Conservation, CAS and MWR, Yangling, Shannxi 712100, China |
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| Abstract: |
| The Yanhe River catchment was chosen as a case study to evaluate quantitatively the carbon sequestration potential of farmland systems and its spatial change. The results showed that the SOM density in natural ecosystem is mainly affected by annual mean rainfall seasonality, annual mean temperature and slope grade while the SOM density in farmland ecosystem by annual average evaporation, annual average temperature in July and slope position. Using the established models for SOM density in natural ecosystem and farmland ecosystem, predictive distribution maps of the SOM density in natural ecosystem and farmland ecosystem are produced under GIS environment (ARCGIS 9.3). Then the predictive distribution map of the SOM density in natural ecosystem minus that of the SOM density in farmland ecosystem to evaluate the carbon sequestration potential of farmland ecosystem in Yanhe River catchment. The results indicate that the SOM density in the catchment increases gradually from northwest to southeast and the total carbon sequestration potential is about 206.48×104 t. This indicates that the carbon sequestration potential of farmland system in Yanhe River catchment is huge, and this conclusion has great implication for making strategy of regional carbon sequestration and evaluation of ecological benefit of land use. |
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