几种木本植物的N_2O释放与某些生理活动的关系  

N_2O emission from woody plants and its relation to their physiological activities

作　　者：杨思河[1] 陈冠雄[1] 林继惠[1] 吴杰[1] 马越强[1] 

机构地区：[1]中国科学院沈阳应用生态研究所陆地生态系统痕量物质生态过程开放实验室

出　　处：《应用生态学报》1995年第4期337-340,共4页Chinese Journal of Applied Ecology

基　　金：中国科学院陆地生态系统痕量物质生态过程开放实验室基金

摘　　要：使用带有开放气路的气体交换测定系统，同步测定了几种针、阔叶树种的光合作用、呼吸作用及气孔导度．结果表明，低光下树木针叶或叶片释放Ｎ２Ｏ的速率与光合速率无显著相关．伴随根、茎、叶的呼吸，检测到有Ｎ２Ｏ吸收现象，其通量与温度及呼吸强度呈正相关．气孔导度明显影响Ｎ２Ｏ的通量，表明气孔可能是木本植物释放Ｎ２Ｏ的主要途径．Using gas exchange measurement system, the photosynthesis, respiration and stomatal conductance of several coniferous and broadleaved tree species were measured simultaneously. Under conditions of low and middle illumination, N2O emission is found from leaves or needles of tested tree species. There is no significant relationship between N2O flux and photosynthetic rate. The N2O absorption by plants is also observed. Its emission rate is increaed with increasing temperature and respiration rate. Stomata is probably the main pathway for N2O emission.

关 键 词：木本植物 氧化亚氮 释放 气孔导度 生理活动 

分 类 号：Q949.408[生物学—植物学]