摘要
以17种苗木为研究对象,调查了其在人工模拟根系全部淹没、1/2淹没和间隙性淹没等3种不同程度水涝胁迫下的死亡率及危害症状情况等,并对其耐水湿性进行了评价。结果表明:在根系全部淹没水涝胁迫14d时,毛果冬青、云南金钱槭出现死亡,死亡率分别为3.33%、13.33%;42d时,云南金钱槭死亡率达100%;56d时,毛果冬青、云南木樨榄、灯台树、水马桑的死亡率分别为86.67%、56.67%、80.00%、86.67%,这些树种均表现出耐水湿性弱。而肋果茶、香油果、红河榕、榉树、多果槭、金丝桃、厚皮香等树种,在根系全部淹没水涝胁迫56d时,虽然成活率高,但危害症状较重,在实际应用中只能作为稍耐水湿树种。而鳞斑荚迷、川滇桤木、连香树、枫杨在根系全部淹没63d时,均未出现植株死亡,尤其川滇桤木、连香树在根系全部淹没77d的水涝胁迫下,未出现植株死亡,表现出具有较好的耐水湿性。
Seedlings of 17 native tree species occurring in Yunnan were selected to investigated their damage symptoms and mortality rates under three simulated water logging conditions, including full root-submersion, 1/2 root-submersion and intermittent root-submersion, and to assess their tolerances to waterlogging. The results showed that the seedlings of Ilex trichocar and Dipteronia dyerana began to die at 14 days after full root-submersion with the motarity rates of 3.33% and 13.33% respectively. All seedlings of D. dyerana died at 42 days. At 56 days after full root-submersion, rates of mortality of the seedlings of I. trichocar, Olea yuennanensis, Cornus controversa and Coriaria nepalensis were 86. 67%, 56. 67%, 80.00% and 86.67% respectively. The five tree species mentioned above exhibited poor tolerance to waterlogging. The seedlings of Sladenia celastrifolia, Lindera communis, Ficus orthoneura, Zelkova schneideriana , Acer proli ficum , Hypericurn monogynum and Ternstroemia gymnanthera had higher survival rate at 56 days after water flooding, but they were damaged considerably and could be used as the strongish tolerant species in the ecological repairation. No death was observed for the seedlings of Viburnum punctaum , Aluum cremastogyne cv. yanshan, Cercidiphgllum japonicum and Plerocarya stenoptera until 63 days after their roots were submerged completely, especially no seedlings of A. cremastogyne cv. yanshan and Cercidiphyllum japonicum died until to 77 days indicating that these tree species exhibited better tolerances to waterlogging.
出处
《西北林学院学报》
CSCD
北大核心
2012年第1期15-21,共7页
Journal of Northwest Forestry University
基金
云南省"十一五"社会发展科技计划项目"滇池南岸湿地生态保护与修复关键技术研究与示范"(2008CA002)
关键词
水涝胁迫
乡土树种
死亡率
耐水性
生态修复
waterlogging
native tree species
mortality
waterlogging-tolerance
ecological repair
