喀斯特次生林不同植物季节性干旱下的绿色度变异特征  

Greenness Variation Characteristics of Different Plants in Karst Secondary Forest under Seasonal Drought

作　　者：李雪 张桂玲 罗绪强[1,3,4] 袁忠秀 王绍英[1] 赵文楷 马浪 Li Xue;Zhang Guiling;Luo Xuqiang;Yuan Zhongxiu;Wang Shaoying;Zhao Wenkai;Ma Lang(School of Geography and Resources,Guizhou Education University,Guiyang 550018,China;School of Chemistry and Materials Science,Guizhou Education University,Guiyang 550018,China;Karst Ecosystem Observation Research Station in Puding,Chinese Academy of Sciences,Puding 562100,China;Guizhou Provincial Key Laboratory of Geographic State Monitoring of Watershed,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]贵州师范学院化学与材料学院,贵州贵阳550018 [3]中国科学院普定喀斯特生态系统观测研究站,贵州普定562100 [4]贵州省流域地理国情监测重点实验室,贵州贵阳550018

出　　处：《山东农业科学》2021年第6期28-32,共5页Shandong Agricultural Sciences

基　　金：国家自然科学基金项目(41563007);贵州师范学院大学生创新训练计划项目(S202114223X);贵州师范学院2020年度校级科学研究基金博士项目(2020BS002);贵州省优秀青年科技人才专项资金项目(黔科合人字〔2015〕21号)。

摘　　要：为探讨季节性干旱下喀斯特次生林不同树种绿色度的变异特征及其影响因素,以中国科学院普定喀斯特生态系统观测研究站沙湾监测研究区次生林通量观测站内的喀斯特次生林为例,在连续干旱背景下分别对其中8种常见植物的绿色度进行了测定分析。结果表明:(1)研究区灌木植物和常绿植物的绿色度普遍较高,藤本植物和落叶植物的绿色度普遍较低。常见植物绿色度的大小关系为马桑>厚果崖豆藤>石岩枫>梓树>构树>朴树>木通>铁线莲。(2)同种植物的绿色度日间变化差异显著,不同种植物在相同时点的绿色度无显著差异。(3)马桑、构树、梓树和厚果崖豆藤的绿色度与相对湿度均显著负相关,马桑的绿色度还与空气温度显著正相关。(4)研究区植物的绿色度受物种因素与环境因素的交互影响不显著。(5)常绿灌木植物马桑具有较强的光合能力,在季节性干旱频繁的喀斯特地区拥有较强的环境适应能力和资源竞争力。In order to discuss the greenness variation characteristics and influencing factors of different plants under seasonal drought in the karst secondary forest,a karst secondary forest located in Shawan monitoring area,karst ecosystem observation research station in Puding,Chinese Academy of Sciences was taken as example,the greenness of eight common plants were measured and analyzed under the background of continuous drought.The results were as follows.(1)The greenness of shrubs and evergreen plants were generally higher,while that of vines and deciduous plants were generally lower.The greenness of the common plants was sequenced as follows:Coriaria nepalensis>Millettia pachycarpa>Mallotus repandus>Catalpa ovata>Broussonetia papyrifera>Celtis sinensis>Akebia quinata>Clematis florida.(2)The greenness of the same plant changed significantly during daytime,but there was no significant differences among different plants at the same time point.(3)The greenness of Coriaria nepalensis,Broussonetia papyrifera,Catalpa ovata and Millettia pachycarpa were significantly negatively correlated with relative humidity,and the greenness of Coriaria nepalensis was significantly positively correlated with air temperature.(4)The greenness of plants in the study area was not significantly affected by the interaction of species and environmental factors.(5)The evergreen shrub Coriaria nepalensis had strong photosynthetic capacity,strong environmental adaptability and resource competitiveness in karst areas with frequent seasonal drought.

关 键 词：喀斯特次生林 季节性干旱 常见植物 绿色度 变异特征 

分 类 号：S718.51[农业科学—林学] Q948.11[生物学—植物学]