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吉林西部水田时空变化与固碳效应研究

, PP. 370-377

Keywords: 吉林西部,水田,LUCC,土壤有机碳,固碳效应

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Abstract:

通过解译吉林西部1989年、1996年、2000年、2004年和2008年等5个年份的土地利用/覆被变化(LUCC)数据,获取吉林西部水田面积变化及其空间分布情况。设置了38个典型采样单元,各单元分别采集3~5个土样,测试不同土地利用类型的有机碳含量,分析水田开发所引起的LUCC变化对水田有机碳储量的影响。结果显示:1989~2008年间由于LUCC变化使得水田表层(0~30cm)土壤有机碳储量增加了874.16×107kg;研究区较大面积的水田表层土有机碳汇位于在白城市与镇赉县交界处及镇赉县东北部,而碳源则主要分布在前郭县北部与松原市境内。研究成果可以为研究全球气候变化提供局地基础数据支持,有助于探索全球及区域尺度的碳循环状况,同时在缓解该区当前严峻的土地问题、为土地开发提供决策依据等方面也具有积极意义。

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