| 摘要: |
| 【目的】 分析山西省农业碳循环过程，为该省的农作物布局，以及利用农业结构调整固碳减排提供科学依据。【方法】 运用山西省11个地区2000-2006年作物产量、种植面积、农业投入等统计数据，对山西省各地区农田生态系统部分碳源/汇进行了分析。【结果】 (1)山西省农田生态系统碳吸收总量从2000年以来呈现波动增加趋势，碳吸收总量从2000年的2 010万t增加到2003年的2 330万t，上升近11%，但从20世纪初期以后开始呈现下降趋势，从2003年的2 330万t下降到2006年的2 230万t；2006年运城和临汾主要以小麦碳吸收为主，其余各市都以玉米碳吸收为主，其中玉米的碳吸收量和单位面积碳吸收量呈增长趋势，稻谷、高粱的碳吸收量和单位面积碳吸收量呈明显下降趋势。(2)山西省农田生态系统碳排放总量从2000年以来呈逐渐增加趋势，增长了8.8%；估算的3种主要碳排放途径中，肥料生产导致的间接碳排放所占比例较大，增速较快，增长近13%，农业机械生产和灌溉过程碳排放变化不大；2006年山西晋城和运城的碳排放量最高，都达到了碳排放总量的22%，单位面积碳排放量也呈逐年增加趋势。(3)山西省农田主要碳吸收量大于主要途径碳排放量。【结论】 山西省农田作物具有较大的碳吸收功能，其中小麦和玉米的农田碳吸收功能较强，但其碳排放的增速也很明显，说明山西省农业投入的增加和机械化程度的提高，削弱了农田生态系统的碳汇功能。 |
| 关键词: 山西省 农田生态系统 碳吸收 碳排放 时空差异 |
| DOI： |
| 分类号: |
| 基金项目:山西省气象科学基金项目；西北农林科技大学科研专项（07ZR022） |
|
| Temporospatial variation analysis of carbon source/sink of farm land ecosystem in Shanxi |
|
WANG Jing,FENG Yong-zhong,YANG Gai-he and CHEN Bing,WANG Jing,FENG Yong-zhong,YANG Gai-he and CHEN Bing,WANG Jing,FENG Yong-zhong,YANG Gai-he and CHEN Bing,WANG Jing,FENG Yong-zhong,YANG Gai-he and CHEN Bing
|
| Abstract: |
| 【Objective】 The study analyzed agricultural carbon cycle process of Shanxi,which can provide scientific basis for crop layout and for fixing carbon and reducing discharge by using agricultural structure adjustment in Shanxi.【Method】 Based on the statistic data of crop yield，planting area and agricultural input in the period from 2000 to 2006,carbon sources and sinks of each farmland ecosystem in Shanxi were abaktzed.【Result】 （1）Farmland total carbon absorption of Shanxi showed a gradual rise trend and increased nearly 11% during the 10 years;wheat is the main carbon absorption crop in citys of Yuncheng and Linfeng,while corn in other regions;carbon absorption and unit area carbon absorption of rice showed a trend of gradual incrase which is exactly contrary to corn and sorghum.（2）Farmland total carbon emissions of Shanxi gradually increased and rose nearly 8.8% during the 15 years;of the three main ways of estimated carbon emissions,the increase rate(13%) of the indirect carbon emission caused by fertilizer production was higher and the speed was faster, however,carbon emissions of farm machinery production and irrigation process changed little;compared with carbon emissions in each area of Shanxi in 2006,carbon emissions were the highest in Jincheng and Yuncheng,which all reached 22% of total carbon emissions;and meanwhile,unit area carbon emissions gradually increased from 2000 to 2006.（3）From the comparison of farmland carbon absorptions and emissions of Shanxi,carbon absorptions were more than carbon emissions.【Conclusion】 Farmland crops have larger carbon absorption ability in Shanxi,and farmland carbon absorption ability of cron and wheat is relatively stronger,however,carbon emissions increase is very obvious.The results also show that the increase in agricultural input and the improvement of mechanized of Shanxi weaken the carbon absorption ability of farmland ecosystems |
| Key words: Shanxi Province farmland ecosystem carbon absorption carbon emission timespace difference |
