农用地碳汇效应估算及时空变化特征分析——以陕西省为例

邢燕燕; 张艳芳

邢燕燕,张艳芳.农用地碳汇效应估算及时空变化特征分析——以陕西省为例[J].干旱地区农业研究,2011,29(3):203~208

农用地碳汇效应估算及时空变化特征分析——以陕西省为例

Study on effects of carbon fixed by different agricultural vegetation patterns in Shaanxi

DOI：10.7606/j.issn.1000-7601.2011.03.38

中文关键词: 农业用地 CO₂物质量时空变化陕西省

英文关键词:agpicultyral land quality of CO₂ spatial and temppral changes Shaanxi Province

基金项目:国家自然科学基金项目(41071057)；陕西省社会科学基金项目(10E126)；教育部人文社会科学研究规划基金项目(10XJA790011)

作者	单位
邢燕燕	College of Tourism and Environment，Shaanxi Normnal University, Xi'an, Shaanxi 710062，China
张艳芳	College of Tourism and Environment，Shaanxi Normnal University, Xi'an, Shaanxi 710062，China

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中文摘要:

以陕西省为例,运用1999~2008年全省气候资料、农用地面积数据、主要农作物产品产量数据以及2006年11个地级市农用地面积数据,从土地利用数量、结构及程度三方面,采用生态学理论与方法研究1999~2008年全省的农用地利用动态变化状况及不同农用地类型的植被固定CO₂物质量的时空变化情况,得出结论:(1)1999~2008年陕西省的植被固定CO₂总量随降水量的显著变化而出现明显的差异变化,但大体呈增加的趋势;(2)林地和园地在CO₂固定过程中占据优势,是农用地植被固定CO₂最重要贡献者。年平均降水量对园地和林地固定CO₂的物质量影响程度要远大于其面积变化的影响。同时国家和区域的经济政策及调整对植被固定CO₂物质量有显著影响并存在空间差异;(3)2006年陕西省植被固定CO₂的量有显著的区域差异,呈南北高、中间低的总特征;(4)一个地区农用地在土地利用结构中所占比例越大则植被固定CO₂量越高。林地占农用地面积比例越大则植被固定CO₂量越高。

英文摘要:

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.

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