Responses of Carex lasiocarpa Morphorlogical Characters to Water Regimes at Different Growth Stages  

作　　者：Li WANG 

机构地区：[1]Northeast Institute of Geography and Agricultural Ecology,CAS [2]Key Laboratory of Environmental Engineering,Shaanxi Province,Xi'an University of Architecture and Technology

出　　处：《Agricultural Science & Technology》2016年第5期1033-1036,共4页农业科学与技术（英文版）

基　　金：Supported by the National Natural Science Foundation of China(41001030);the Natural Science Basic Research Plan in Shaanxi Province of China(2014JQ5194,2014JM7206);the Education Department of Shaanxi Province Special Research Project(12JK0484;15JK1386)

摘　　要：[Objective] The morphological characters of C.lasiocarpa were studied to find its morphological responses to different water regimes and growth stretagies through different water experiences.[Method] A seeding transplanting experiment with controlled water levels was set up,and the water level was changed at the middle of the season to compare water influence at the seeding stage and later growing period.C.lasiocarpa height,leaf length,leaf number,rhizome and adventitious roots length were measured at certain time througth the growing season.[Result] Results at the thriving season indicated that C.lasiocarpa height and leaf length in the experiment were similar to that in the field,but leaf number was higher under-5 cm water level and dry-wet alternate conditions than that in the field.At later growth period,height and leaf length under constant flooding(15cm) was significantly higher than that under other culture conditions,and also that of the field investigation;while the leaf number had a trend as-5 cm water level treatment>constant flooding>dry-wet alternate>field investigation.The height and leaf length were sensitive to seeding stage water effects,and leaf number sensitive to later influences.[Conclusion] Changes of water regimes in the growing season disturbed the growth of C.lasiocarpa,could accelerate or suspend its wilt,and modified the length of life history.[Objective] The morphological characters of C.lasiocarpa were studied to find its morphological responses to different water regimes and growth stretagies through different water experiences.[Method] A seeding transplanting experiment with controlled water levels was set up,and the water level was changed at the middle of the season to compare water influence at the seeding stage and later growing period.C.lasiocarpa height,leaf length,leaf number,rhizome and adventitious roots length were measured at certain time througth the growing season.[Result] Results at the thriving season indicated that C.lasiocarpa height and leaf length in the experiment were similar to that in the field,but leaf number was higher under-5 cm water level and dry-wet alternate conditions than that in the field.At later growth period,height and leaf length under constant flooding（15cm） was significantly higher than that under other culture conditions,and also that of the field investigation;while the leaf number had a trend as-5 cm water level treatment〉constant flooding〉dry-wet alternatefield investigation.The height and leaf length were sensitive to seeding stage water effects,and leaf number sensitive to later influences.[Conclusion] Changes of water regimes in the growing season disturbed the growth of C.lasiocarpa,could accelerate or suspend its wilt,and modified the length of life history.

关 键 词：Water regimes Phenotypic characters Marsh wetland 

分 类 号：Q945[生物学—植物学]