三峡库区3种豆科植物种子水淹耐受性及淹后萌发动态  

Seed Submergence Tolerance and Germination Dynamic of Three Legume Species Growing in Three Gorges Reservoir Area

作　　者：潘晓娇[1] 林锋[1] 刘园园[1] 牛汉刚[1] 史邵华 李斯琪[1] 张松林[1] 杨熙[1] 曾波[1] 

机构地区：[1]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西南大学生命科学学院,重庆400715

出　　处：《重庆师范大学学报（自然科学版）》2017年第4期33-39,共7页Journal of Chongqing Normal University:Natural Science

基　　金：国家自然科学基金(No.31370443;No.31070474;No.30500041);国务院三峡办三峡后续工作库区生态与生物多样性保护专项项目(No.5000002013BB5200001;No.5000002013BB5200002)

摘　　要：【目的】明确合萌(Aeschynomene indica)、天蓝苜蓿(Medicago lupulina)及印度草木犀(Melilotus indica)3种河岸带常见一年生豆科植物在三峡库区消落带的生存能力。【方法】以未经历水淹的野外自然条件(CK)为对照,探究了3种植物的种子在三峡库区消落带不同海拔高程(170,165,160,155m)的水淹耐受性及水淹后的萌发动态。【结果】1)3种植物的种子在经历不同高程水淹后,都能保持较高的完好种子比率;即使在经历155m高程水淹250d后,完好种子比率最低的印度草木犀仍能保持在32.67%以上。2)在CK及170,165,160和155m高程水淹后,合萌种子的成苗比率分别为60.17%,95.33%,88.67%,74.17%和85.33%;天蓝苜蓿种子的成苗比率分别为48.47%,70.00%,56.33%,48.17%和50.33%;印度草木犀种子的成苗比率分别为93.47%,74.33%,42.33%,43.00%和29.50%。3)海拔165m以上高程适度的水淹加快了3种物种种子的萌发进程,有利于植物在消落区生长窗口期快速建成植被;随着高程的降低,合萌种子仍能保持良好的适应性,天蓝苜蓿及印度草木犀种子的适应性有所下降。【结论】在三峡库区消落带植被恢复与重建工作中,可根据3种豆科植物在消落区不同高程的生存能力对它们进行合理的配置。[Purposes]In order to make sure the survival potential of Aeschynomene indica, Medicago lupulina, Melilotus indica which are all common annual leguminous plants in the riparian zone. [Methods] The water tolerance of their seeds are conducted here, as well as the germination dynmic after water flooding at different elevations （170, 165, 160, 155 m）, the seeds are also studied without suffering logging in nature condition as control. [Findings] 1） after water flooding, the seeds can keep a high proportion of intact seeds at different elevations, even if the ones of M. indica, underwent a 250 day flooding at 155 m, whose intact seeds proportion remained above 32.67 %. 2） The seed seeding rates of A. indica in control group and in the elevation of 170, 165, 160, 155 m were 60.17%/00, 95.33%, 88.67%, 74.17%,85.33%, respectively; similarly, the rates of M. lupulina in different groups were 48.47%, 70.00%, 56.33%, 48.17%, 50.33%, and the rates of M. indica were 93.47%, 74.33%, 42.33 %, 43 %, 29.50 %. 3） All seeds showed good adaptability to the water logging in the elevation of 170, 165 m. [Conclusions] Water logging accelerated the germination process, as compared with the gradually process of that of CK, and was also beneficial to the vegetation recovery at the initial stage of water break in the TGR region, with the increasing intensity of submergence, adaptability of M. lupulina and M. indica declined.

关 键 词：三峡库区 豆科植物 水淹耐受 植被恢复 

分 类 号：Q142.9[生物学—生态学]