不同盐度下互花米草生长状况的比较研究  

Comparative study on growth status of Spartina alterniflora under different salinity

作　　者：陈伟霖[1] 梁梓娇 缪绅裕[1] 陶文琴[1] 刘志群[1] 龙连娣 戴文坛 CHEN Wei-lin LIANG Zi-jiao MIAO Shen-yu TAO Wen-qin LIU Zhi-qun LONG Lian-di DAI Wen-tan(School of Life Sciences, Guangzhou University, Guangzhou 510006, China)

机构地区：[1]广州大学生命科学学院,广东广州510006

出　　处：《广东农业科学》2017年第4期67-72,共6页Guangdong Agricultural Sciences

基　　金：国家自然科学基金(31270526)

摘　　要：在温室中建立模拟湿地系统,比较了不同盐度(10‰、20‰和30‰)培养下的互花米草生长状况和生理特性,以探讨互花米草对盐浸环境的适应性。结果表明,不同盐度处理组互花米草在株高、基茎、叶片SPAD、叶绿素含量、氮含量、死亡率等方面有显著差异。随着盐浓度的升高,植株高度和基茎呈下降趋势,互花米草叶片随着盐度增加,叶片SPAD和叶绿素含量增加;在高盐度(30‰)下,显著降低了互花米草的各器官干重生物量;盐度20‰的环境中互花米草存活率最高、为55.16%,盐度30‰的环境中互花米草的存活率最低、为43.22%。互花米草对不同盐度的适应性较强,但高盐度对其生长仍有一定的限制作用。A simulated wetland system was set up in a greenhouse,the growth traits and physiological characteristics of Spartina alterniflora under different salinity （10‰,20‰ and 30‰） were compared to study the adaptability of S. alterniflora to salt leaching environment. Results showed that there were significant differences from different salinity treatments with plant height,basal stem,leaf SPAD,chlorophyll content,nitrogen content and mortality of S. alterniflora. With the increase of salt concentration,plant height and stem decreased,leaf of S. alterniflora increased,leaf chlorophyll content and SPAD increased. The highest salinity （30‰） significantly decreased the dry weight biomass of S. alterniflora. The survival rate of S. alterniflora was 55.16% in salinity 20‰,and the survival rate of S. alterniflora was the lowest （43.22%） in salinity 30‰. S. alterniflora had a relatively high adaptability to salinity,but high salinity had certain restrictions to the plant growth.

关 键 词：互花米草 不同盐度 盐浸环境 叶片SPAD 适应性 限制作用 

分 类 号：S184[农业科学—农业基础科学]