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华南丘陵区农林复合生态系统稻田二氧化碳排放及其影响因素 被引量:18

CO_2 emission and its affecting factors in paddy field of agroforestry ecosystem in South China hilly area
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摘要 采用静态箱-气相色谱法对稻田CO2排放进行田间原位测定,探讨农林复合生态系统稻田温室气体CO2的排放规律。结果表明,在生长季节中,有植株参与稻田CO2排放速率的日变化形式均为白天出现排放高值,夜间出现排放低值。有植株参与稻田CO2昼夜排放速率平均值都显著高于无植株参与稻田。温度(气温、地表温度、地下5 cm温度)是有植株参与稻田在植株生长期间稻田CO2排放速率昼夜变化的主要影响因素。水稻作物对CO2的排放影响较大,早稻有、无植株参与稻田CO2季节平均排放速率分别为316.29±23.74和101.88±16.83 mg.m-2.h-1。晚稻有、无植株参与稻田CO2季节平均排放速率分为622.40±57.67和179.41±19.51 mg.m-2.h-1。早、晚稻有植株参与稻田的CO2季节平均排放量分别比无植株参与稻田增加了310%和347%。 With closed static chamber and modified gas chromatograph(HP5890Ⅱ),this paper measured the CO_2 emission from the paddy field of agroforestry ecosystem in hilly area of South China.Gas samples were taken from rice-involved and uninvolved plots simultaneously.In rice-involved plot,the emission was higher at daytime but lower at night,and the diurnal CO_2 emission rate was highly correlated to air temperature,soil surface temperature,and soil temperature at a depth of 5 cm.During rice growth period,the averag...
出处 《生态学杂志》 CAS CSCD 北大核心 2006年第5期471-476,共6页 Chinese Journal of Ecology
基金 中国科学院知识创新工程项目(KZCX-SW-01-01B-05 KSCX2-SW-133) 国家杰出青年科学基金项目(B类)(30428022) 国家自然科学基金项目(30270239) 广东省自然科学基金项目(031265) 中国科学院华南植物园知识创新基金资助项目(2002-2110)。
关键词 农林复合生态系统 稻田 CO2 静态箱法 agroforestry ecosystem paddy field CO_2 closed static chamber technique.
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