花椒树下苜蓿、百脉根和白三叶的光合生理生态特性研究  

Study on photosynthetic physical and ecological characteristics of alfalfa,bird foot trefoil and white clover growing under Chinese prickly ash tree

作　　者：曾艳琼[1] 卢欣石[1] 杨世民 

机构地区：[1]北京林业大学资源与环境学院,北京100083 [2]甘肃省临夏州林业种苗工作站,甘肃临夏731100

出　　处：《草业科学》2008年第4期119-123,共5页Pratacultural Science

基　　金：奶业发展重大关键技术研究与示范项目子专题"西北地区高效林草间作模式与技术体系研究"(2006BAD04A04-06-08);北京林业大学自选课题资金资助(06jj012);农业部草地农业生态系统学重点开放实验室部分资助

摘　　要：为科学指导林草复合中对林下间作牧草的选择,运用美国LI-COR公司制造的LI-6400便携式光合测定系统,研究了白三叶Tritolium repens、苜蓿Medicago sativa和百脉根Lotus corniculatus在林草间作时的光合生理生态特性,探讨三者在林下间作的生态适应性。结果表明:白三叶、苜蓿和百脉根净光合速率(Pn)和气孔导度(Gs)的日变化均为双峰曲线,2个峰值分别出现在11:00和15:00左右。3种植物的Pn与Gs都具有显著相关关系,且叶片温度(Tl)与蒸腾速率(Tr)呈极显著正相关关系。The photosynthetic physical and ecological characteristics of alfalfa, bird foot trefoil and white clover growing under Chinese prickly ash tree were studied using Li-6400 portable photosynthesis system made by LI-COR company. The results indicated that daily variation of net photosynthesis rate （Pn）,and stomata conductance （Gs） of three forage species showed a double-apex curve with two apex at 11：00am and 15：00pm, alfalfa had higher apex that the other species. Net photosynthesis rate （Pn） and stomata conductance （Gs） of the three species were significantly correlated, leaves temperature（T1） and transpiration rate（Tr） also significantly correlated.

关 键 词：林草复合 苜蓿 百脉根 白三叶 光合作用 

分 类 号：S54[农业科学—作物学]