野古草水淹后恢复生长动态研究  

Research on Dynamics of the Recovery Growth of Arundinella anomala Steud.after Submergence in Water

作　　者：李娅[1] 曾波[2] 

机构地区：[1]西安航空技术高等专科学校车辆与医电工程系,陕西西安710077 [2]西南大学生命科学学院,三峡库区生态环境教育部重点实验室,重庆市三峡库区植物生态与资源重点实验室,重庆400715

出　　处：《安徽农业科学》2012年第19期10112-10114,共3页Journal of Anhui Agricultural Sciences

基　　金：国家自然科学基金项目(30770406);教育部新世纪优秀人才支持计划项目(NCET-06-0773)

摘　　要：[目的]探究野古草(Arundinella anomala Steud.)水淹处理后不同恢复生长期的生长差异。[方法]通过设置对照、水淹根部(植株置于水中,仅地下部分被淹没)和水淹2 m(植株置于水中,顶部距水面2 m)3个水淹深度以及40、60、90 d 3个水淹时间,观察了野古草在出水后不同恢复生长期的生长情况。[结果]短期水淹后,野古草在整个恢复生长期的分蘖数保持不变。90 d的长期水淹后,其分蘖数在恢复生长初期迅速增加,且分蘖数增加速率都高于对照植株,在恢复生长后期生长速率有所降低,但仍高于对照植株。长时间的水淹会使野古草植株地上部分生物量减少,但在出水后的整个恢复生长期地上部分生物量会迅速增加。[结论]野古草植株在水淹后仍可进行恢复生长,长时间水淹后其生长在恢复生长初期表现更明显,说明该物种对水淹具有一定的耐受能力。[Objective] To explore the differences in the recovery growth of A.anomal after submergence at different time.[Method] Three treatments were set up,namely,the control,underground submergence（underground of plants submerged in water） and complete submergence with 2 m water depth（top of plants 2 m below water surface）.Three flooding durations were also set up,including 40,60 and 90 d.The growth of A.anomala at different recovery periods was observed.[Result] After short-period submergence,the tiller number of A.anomala remained the same during the whole recovery period.Tiller number of A.anomala exposed to 90 d submergence increased quickly during the early recovery period,and it started to increase slowly during the late recovery period,but the rate of increase was still higher than that of the control plants.The aboveground biomass of A.anomala was inhibited by long-term submergence,but it increased quickly during recovery period.[Conclusion] A.anomala still had recovery capability after submergence,especially at the primary stage of recovery growth,and it showed good tolerance to submergence.

关 键 词：野古草 水淹 恢复生长动态 

分 类 号：S422[农业科学—植物保护] Q948.1[生物学—植物学]