| Study on effects of carbon fixed by different agricultural vegetation patterns in Shaanxi |
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| DOI：10.7606/j.issn.1000-7601.2011.03.38 |
| Key Words: agpicultyral land quality of CO2 spatial and temppral changes Shaanxi Province |
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| Abstract: |
| Taking Shaanxi Province for example, based on the climate data，the agricultural land area date，the main crops’production from 1989~2008 and the statistic data of aqricultural land area in Shaanxi in 2006，the paper
analyzes the dynamic change of land use and the spatial temporal changes and differences of CO2 fixed by different kinds of agricultural vegetation in Shaanxi from three aspects: the number, the structure, and the extent of land-use. And the conclusions were drawn as follows: (1)The total CO2 fixed by different agricultural vegetation had obvious changes with the difference of the precipitation and was increasing in Shaanxi from 1989~ 2008; (2) Woodland and orchard dominated CO2 fixed by different kinds of agricultural vegetation and were the most important contributors. The annual average tem-perature had more influence on quantities of CO2 fixed by woodland and orchard than the influence from its area change. Quantities of CO2 fixed was remarkably influenced by the national and regional economic policy and adjustment， and had
obviously diferences in space; (3) The quantities of CO2 fixed by agricultural vegetation in Shaanxi were different among regions in 2006， and its total characteristic is that the north and south was high, while the middle was low; (4) The bigger the proportion of agricultural land，the higher the quantities of CO2 fixed. The bigger the proportion of woodland, the higher the quantities of CO2 fixed. |