摘要
以川西北高寒沙区金露梅、高山绣线菊、窄叶鲜卑花、康定柳、沙棘等5种主要灌木植物叶性状为研究对象,分析了5种灌木叶片结构功能性状的差异,相关性以及与其他地区叶片结构功能性状的差异,探讨该地区植物对环境的适应性,为该地区生态系统植被的恢复和重建提供理论依据。结果表明:5种灌木的叶片厚度(LT)和比叶面积(SLA)平均值差异大都显著,金露梅和康定柳的SLA显著低于其余3种灌木,金露梅叶组织密度(LTD)平均值显著高于其余4种灌木,除沙棘外,其余4种灌木间叶干物质含量(LDMC)平均值差异均不显著。叶片各功能性状之间存在着显著的相关性:SLA与LDMC、LTD、LT在显著负相关,LDMC与LTD、LT呈显著负相关。川西北高寒沙区5种灌木植物的SLA总体上明显低于北京东灵山、广西大明山、湖北神农架研究点植物的SLA,LT明显高于北京东灵山、广西大明山、湖北神农架研究点植物的LT。由此可得出:川西北高寒沙区5种主要灌木中金露梅和康定柳对干旱贫瘠的沙化土地的适应能力更强。
Based on the leaf traits of five main shrubs(Potentilla fruticose,Spiraea alpina,Sibiraea angustata,Salix paraplesia,Hippophae rhamnoides)in the alpine sand region of northwest Sichuan province,the differences of leaf structural and functional traits of the five shrubs,the correlations and differences with those of other regions were analyzed.The aim of this study was to explore the adaptability of plants to the environment in the region,and to provide the theoretical basis for the restoration and reconstruction of the ecosystem in the area.The results showed that the:the average of leaf thickness(LT)and specific leaf area(SLA)of the five shrubs were significantly different.The average SLA of Potentilla fruticose and Salix paraplesi were significantly lower than those of the other three shrubs.The average leaf tissue density(LTD)of Potentilla fruticose was significantly higher than that of the other four shrubs.Except Hippophae rhamnoides,there was no significant difference in the mean value of dry matter content(LDMC)among the other four shrubs.There was a significant correlation between functional traits of leaves:SLA was significantly negatively correlated with LDMC,LTD,LT,and LDMC was significantly negatively correlated with LTD and LT.The SLA of five shrubs in the alpine sand region of northwest Sichuan was significantly lower than that of plants in Beijing Dongling Mountain,Guangxi Daming Mountain and Hubei Shenlongjia Research Stations,and LT was significantly higher than of plants in the other three research points.It can be concluded that Potentilla fruticose and Salix paraplesia are more adaptable to drought and barren desertification among the five main shrubs in the alpine sand region of northwest Sichuan.
作者
邓东周
刘成
贺丽
鄢武先
陈德朝
李佳泳
DENG Dongzhou;LIU Cheng;HE Li;YAN Wuxian;CHEN Dechao;LI Jiayong(Sichuan Academy of Forestry Sciences,Chengdu 610081,China;Sichuan Forestry and Grassland Inventory and Planning Institute,Chengdu 610081,China;Ecological Restoration and Conservation for Forest and Wetland Key Laboratory of Sichuan Province,Chengdu 610081,China)
出处
《四川林业科技》
2020年第3期1-6,共6页
Journal of Sichuan Forestry Science and Technology
基金
国家科技支撑计划“川西北藏区高寒沙地适生治沙灌木材料培育及示范”(2015BAC05B01)
四川省省级科研院所基本科研业务费“川西北地区流动沙地土壤改良技术研究”(JB2015-07)
四川省省财政专项“川西藏区沙生植物种质资源调查与初步评价研究”(ZL2014-26)。
关键词
川西北
高寒沙区
功能性状
比叶面积
叶干物质含量
Northwest Sichuan
Alpine sandy land
Functional traits
Leaf dry matter content
Specific leaf area
