喀斯特高原退化植物群落常见灌木叶片SPAD值变异特征  

Variation Characteristics of SPAD Values in Leaves of Common Shrubs from Degraded Plant Communities in the Karst Plateau

作　　者：赵娜 罗绪强 张桂玲[2,3] 王绍英[1] 马浪 赵超超 阮英慧 刘兴 ZHAO Na;LUO Xu-qiang;ZHANG Gui-ling;WANG Shao-ying;MA Lang;ZHAO Chao-chao;RUAN Ying-hui;LIU Xin(School of Geography and Resources,Guizhou Education University,Guiyang 550018,China;Karst Eco-system Observation Research Stationin Puding,Chinese Academy of Sciences,Puding 562100,China;Guizhou Provinclal Key Laboratory of Geographic State Monitoring of Watershed,Guizhou Education University,Guiyang 550018,China)

机构地区：[1]贵州师范学院地理与资源学院,贵州贵阳550018 [2]中国科学院普定喀斯特生态系统观测研究站,贵州普定562100 [3]贵州师范学院贵州省流域地理国情监测重点实验室,贵州贵阳550018

出　　处：《黑龙江农业科学》2019年第12期36-41,共6页Heilongjiang Agricultural Sciences

基　　金：国家自然科学基金(41563007);国家级大学生创新训练项目(201814223003);贵州省高等院校大学生创新训练项目(2018520459);贵州省优秀青年科技人才培养对象专项资金项目(黔科合人字[2015]21号);贵州省高层次创新型人才资金项目(黔人领发[2015]3号)

摘　　要：为促进喀斯特高原地区生态环境保护及植被恢复,以贵州清镇王家寨小流域内不同演替阶段植物群落中的6种常见灌木为研究对象,分别对这6种灌木叶片的SPAD值进行了测定分析。结果表明:研究区植物叶片SPAD值变化范围在14.43~47.70,平均值为23.84。各演替阶段植物群落常见灌木叶片SPAD值的平均值表现为灌木林(29.04)>草灌丛(25.96)>灌草丛(25.92)>乔灌林(19.90)>乔木林(18.36)。植物叶片SPAD值在不同演替阶段植物群落之间差异显著(P=0.000),但在各群落内部均较稳定,表明研究区植物叶片SPAD值的改变在一定程度上是对生境条件变化的响应。6种灌木叶片的SPAD值在种内的变化均不明显,但在种间的差异却比较显著(P<0.05),说明树种是影响研究区植物叶片SPAD值大小的重要因子。植物种、群落类型对研究区植物叶片SPAD值均有显著影响(P=0.000)并产生了强烈的交互作用(P=0.000)。研究区灌木林群落中的植物光合能力最强、生境条件最好,灌木林群落是喀斯特退化生态系统植被恢复演替的关键阶段。In order to promote ecological environment protection and vegetation restoration in Karst Plateau,the SPAD values and their variation in leaves of six common shrub species collected from different succession communities in the small watershed of Wangjiazhai,Qingzhen City,Guizhou Province,were analyzed.The results showed that the SPAD values were from 14.43 to 47.70,with an average of 23.84.A trend of SPAD value among different plant communities was found as shrub(29.04)>grass-shrub(25.96)>shrub-grass(25.92)>tree-shrub(19.90) > forest-shrub(18.36);The SPAD values were stable within the same successional community and showing significantly diversity among plant communities at different succession stages(P=0.000),which indicated that SPAD value and it′s variation had a response to plant’s habitat conditions;The SPAD values were relatively stable within intra-species but significantly diversity among interspecies(P<0.05),which presented that different species is related to the difference of SPAD values;Both the diversities of species,community types and their interactions in the study area influenced SPAD values evidently(P=0.000);In this study,species collected from shrub community had the strongest photosynthetic capacity and best habitat condition compared to species sampled from the left four community types,which made the shrub community deserved as the key stage of vegetation restoration succession in Karst degraded ecosystem.

关 键 词：喀斯特高原 退化植物群落 灌木 叶绿素含量 SPAD值 变异特征 

分 类 号：Q94[生物学—植物学]