4个狗牙根品种水分利用效率的比较  

Comparative Study on Water Use Efficiency of 4 Bermudagrass Varieties

作　　者：费永俊[1] 廖启蓉[1] 曾璇[1] 

机构地区：[1]长江大学园艺园林学院,湖北荆州434025

出　　处：《长江大学学报（自科版）（中旬）》2007年第3期37-39,共3页Journal of Yangtze University(Nature Science Edition)

基　　金：湖北省科技厅攻关项目(2002AA3001C99);湖北省教育厅重大科研项目(2002Z0007);湖北省涝渍灾害与湿地农业重点实验室开放基金(HNKFJ2002C03);湖北省自然科学基金(2000J118);湖北省教育厅优秀中青年科技创新团队资助项目(鄂教科[2003年7号]文-12)

摘　　要：比较了生长在植被砼上4个狗牙根(Cynodon dactylonL.)品种(Jackpot、Common、040459/680、Xin-nong No.1)的光合速率、蒸腾速率和水分利用效率。结果表明,4个品种的光合速率的差异性水平高于蒸腾速率和水分利用效率;水分利用效率由高到低的顺序是:Common(3.69)、040459/680(3.56)、Jackpot(3.31)、Xinnong No.1(3.16);光合速率、蒸腾速率、水分利用效率之间有或正或负的相关关系。The net photosynthesis rates and transpiration rates of 4 bermudagrass varieties(Jackpot,Common,040459/680 and Xinnong No.1) planted on vegetation concrete condition were measured.Their water use efficiencies(WUE) were calculated.The results indicated that the difference level of photosynthesis were higher than those of transpiration rate and water use efficiency;The water use efficiency of 4 bermudagrass varieties from high to low was:Common(3.69),040459/680(3.56),Jackpot(3.31),Xin nong No.1(3.16);There were remarkable correlation among the net photosynthesis rate,the transpiration rate and water use efficiency of 4 bermudagrass varieties.

关 键 词：狗牙根(Cynodon dactylon L.) 光合速率 蒸腾速率 水分利用效率 

分 类 号：Q945.1[生物学—植物学] Q949.714.2