开放式空气CO_2增高对稻田CH_4和N_2O排放的影响  

Effects of elevated atmospheric CO_2 on CH_4 and N_2O emissions from paddy fields.

作　　者：徐仲均[1] 郑循华[1] 王跃思[1] 韩圣慧[1] 黄耀[1] 朱建国[2] 

机构地区：[1]中国科学院大气物理研究所,北京100029 [2]中国科学院南京土壤研究所,南京210008

出　　处：《应用生态学报》2002年第10期1245-1248,共4页Chinese Journal of Applied Ecology

基　　金：国家自然科学基金项目 (4 0 175 0 3 0;40 12 0 14 0 817);中国科学院知识创新重要方向资助项目 (KZCX2 40 8) .

摘　　要：在FACE(free aircarbondioxideenrichment)平台上 ,采用静态暗箱 气相色谱法观测研究了大气CO2 浓度增加对稻田CH4和N2 O排放的影响 .结果表明 ,在 15 0和 2 5 0kgN·hm-2 两种氮肥水平下大气CO2 浓度增加 2 0 0 μmol·mol-1均明显促进水稻生长 ,水稻生物量积累 .大气CO2 浓度增加对 15 0和 2 5 0kgN·hm-2 两种氮肥水平下稻田CH4排放均无显著影响 ,并简要分析了与现有文献报道结果不一致的原因 .大气CO2 浓度增加也未导致 15 0和 2 5 0kgN·hm-2 两种氮肥水平下稻田N2 O排放的明显变化 ,与大多数研究结果一致 .Effects of elevated atmospheric CO 2 on CH 4 and N 2O emissions during the paddy rice-growing season were examined in a FACE (free-air carbon dioxide enrichment) study. The emission fluxes of CH 4 and N 2O from paddy rice fields were measured using methods based on static opaque-chamber and gas chromatography techniques. Synthetic fertilizer N was amended for the rice-growing season at two rates, 150 and 250kgN·hm~ -2 and the atmospheric CO 2 was enriched by 200μmol·mol~ -1. At both N levels, the preliminary results indicate that no significant effect of CO 2 enrichment on CH 4 and N 2O emissions from the rice paddy fields was detected. The result on CH 4 emissions is inconsistent with the most literatures, and the result on N 2O emissions is consistent with the most literatures.

关 键 词：开放式空气CO2浓度增高 稻田 CH4排放 N2O排放 

分 类 号：S511[农业科学—作物学]