盐胁迫对9种植物发芽生长的影响  

Effect of Salt Stress on Plant Germination and Growth of Nine Plants

作　　者：薛凤[1] 魏天兴[1] 葛根巴图[2] 

机构地区：[1]北京林业大学水土保持与荒漠化防治教育部重点实验室水土保持学院,北京100083 [2]中国林业科学研究院沙漠林业实验中心,内蒙古磴口015200

出　　处：《林业调查规划》2015年第4期123-128,132,共7页Forest Inventory and Planning

基　　金：国家科技支撑计划"防海岸带侵蚀沿海泥质海岸防护林体系研究与示范"(2009BADB2B0602)

摘　　要：研究了白蜡、刺槐、国槐、紫穗槐、臭椿、白榆、杜梨、锦鸡儿、侧柏等9种乔灌木种子和苗木在不同盐浓度(0.1%、0.2%、0.3%、0.4%、0.5%、0.6%)溶液处理下的植物种子发芽和幼苗生长情况,以无离子水溶液处理作对照(CK),确定影响植物发芽和幼苗成活、生长的关键盐浓度,并选出最优树种,为不同盐含量的滨海立地选择植物。结果表明:19种植物种子发芽率和幼苗成活率均呈随盐浓度增加而减少的趋势。20.3%盐浓度是影响9种树种发芽的关键浓度;0.2%盐浓度是影响9种树种生长的关键浓度。3就植物种子发芽情况,当盐浓度≤0.3%时,最优选择树种是刺槐、侧柏、紫穗槐。当盐浓度>0.3%时,最优选择树种是刺槐、紫穗槐。就幼苗生长状况,当盐浓度≤0.2%时,最优选择树种是白蜡、侧柏、刺槐;当0.2%<盐浓度≤0.3%时,优先选择树种是刺槐、侧柏。4综合植物种子发芽率和幼苗生长状况得知,盐浓度低于0.2%的盐碱地区,刺槐、侧柏是最优选择树种,盐浓度高于0.2%的盐碱地区优选树种为刺槐。Nine plants included Fraxinus chinensis Roxb, Robinia pseudoacacia Linn, Sophora japonica Linn, Amorpha fruticosa Linn, Ailanthus altissima （Mill.） Swingle, Ulmus pumila Linn, Pyrus betulae- folia Bunge, Caragana sinica （Buchoz） Rehd, Platycladus orientalis （ Linn. ） Franco were chose to study their seed germination and seedling growth under different concentrations of NaC1 （0. 1% , 0.2% , 0.3% , 0.4% , 0.5% , 0. 6% ） solution, compared with seeds and plants treated with distilled water, justify the critical salt concentration and the suitable plants were chose for costal areas. The result showed that ： （ 1 ） Seedling survival percentage and nine seedling germination rate, in comparison, were reduced salt concentration, and Robinia pseudoaeacia Linn, Amorpha frutieosa Linn were optimal plants when salt concentration above 0.3%. For seedling growth, the optimal plants were Fraxinus chinensis Roxb, Rob- inia pseudoacacia Linn, and Platyeladus orientalis （Linn.）Franco when the salt concentration below 0.2% , but Robinia pseudoaeacia L. and Platyeladus orientalis （ Linn. ） Franco were chose as optimal plants when above 0.2% and below 0.3% of salt concentration. （4） Integrated these two indexes, Rob- inia pseudoacacia and Platycladus orientalis （Linn.） were better options for coastal area where the salt concentration lower than 0.2% , but Platycladus orientalis （ Linn. ） Franco was perfect choice for the coastal area where the salt eoncentration higher than 0.2%.

关 键 词：盐胁迫 种子发芽 幼苗生长 盐浓度 优选树种 

分 类 号：S728.5[农业科学—林木遗传育种] S722.33[农业科学—林学]