半干旱地区引种11个国外苜蓿品种的光合性能研究  

Study on Photosynthetic Characteristics of 11 introduced Alfalfa Varieties In Semi-arid Region

作　　者：吕小东[1] 王建光[1] 孙启忠[2] 

机构地区：[1]内蒙古农业大学生态环境学院,内蒙古呼和浩特010018 [2]中国农业科学院草原研究所,内蒙古呼和浩特010010

出　　处：《内蒙古草业》2013年第1期28-31,共4页Inner Mongolia Prataculture

基　　金：科技部"十二.五"国家科技支撑计划项目"牧区及农牧交错带奶牛健康养殖技术集成及产业化示范(2012BAD12B09)"现代农业产业体系建设专项资金(CARS-35)

摘　　要：利用Li-6400XT光合仪,以地方品种敖汉苜蓿为对照,对在北方半干旱地区引种的11个国外苜蓿品种初花期的净光合速率(Pn)、蒸腾速率(Tr)和气孔导度(Gs)等进行测定,比较研究各品种间的光合性能。结果表明:苜蓿各品种间光合性能有很大差异,引进品种WL323、金皇后、阿尔冈金和农宝的光合性能都优于敖汉苜蓿;初花期苜蓿单叶的气孔导度、蒸腾速率、水分利用效率等对群体产草量的影响大于净光合速率。结合产草量进行分析,认为WL323、金皇后和阿尔冈金等适宜引进,以WL323最佳;在个别干旱较严重地区,也可选用农宝。In comparison with domestic alfalfa variety Aohan, the photosynthetic characteristics of the intro- duced foreign 11 alfalfa varieties planted in semi--arid region were measured at early flowering period under field condition,using Portable LI-6400XT Photosynthesis System. The results showed that： there were much differ- ences between the different varieties; the photosynthetic characteristics of introduced varieties WL323,Golden Em- press,Algonquin and Farmers Treasure ,were superior to Aohan; at early flowering period , Gs,Tr,WUE had more effect on the hay yield than Pn. Combined with yield analysis , WL323 was the most suitable variety, fol- lowed by Golden Empress and Algonquin; Farmers Treasure can be adapted to specifc severe drought area.

关 键 词：苜蓿品种 引种 光合性能 产量 半干旱地区 

分 类 号：S541.9[农业科学—作物学]