不同林龄中间锦鸡儿叶功能性状及其对年际降水量的响应  

The Leaf Functional Traits of Caragana liouana Planted in Different Ages and their Responses to Inter-Annual Precipitation Variability

作　　者：李琴[1,2,3] 王奕璇 王磊[1,2,3] 张雪 潘昱伶[1,2,3] 杨新国 王筱平[4] LI Qin;WANG Yi-xuan;WANG Lei;ZHANG Xue;PAN Yu-ling;YANG Xin-guo;WANG Xiao-ping(School of Ecology and Environment,Ningxia University,Yinchuan,Ningxia 750021,China;Breeding Base for Sate Key Laboratory of Land Degradation and Ecological Restoration in Northwestern China,Yinchuan,Ningxia 750021,China;Key Laboratory for Restoration and Reconstruction of Degraded Ecosystems in Northwestern China of Ministry of Education,Ningxia University,Yinchuan,Ningxia 750021,China;National Positioning Observatory of Yellow River Wetland Ecosystem,Yinchuan,Ningxia 750021,China)

机构地区：[1]宁夏大学生态环境学院,宁夏银川750021 [2]西北土地退化与生态恢复国家重点实验室培育基地,宁夏银川750021 [3]西北退化生态系统恢复与重建教育部重点实验室,宁夏银川750021 [4]宁夏黄河湿地生态系统国家定位观测研究站,宁夏银川750021

出　　处：《草地学报》2024年第12期3836-3844,共9页Acta Agrestia Sinica

基　　金：国家自然科学基金(32100307);宁夏重点研发计划项目(2022BEG02012);宁夏自然科学基金项目(2020AAC03108);宁夏领军人才项目(2021GKLRLX13)资助。

摘　　要：降水作为内陆干旱地区植被重要的水分来源,在调节中间锦鸡儿(Caragana liouana)叶功能性状与生长发育中发挥关键作用。本研究以不同林龄中间锦鸡儿为研究对象,分析不同林龄中间锦鸡儿叶功能性状差异及其对年际降水量变化的响应机制,旨在揭示其对荒漠区干旱环境的适应策略。结果表明:不同林龄中间锦鸡儿叶片种内变异程度大;PCA分析结果显示叶长、叶宽、叶鲜重,叶干重与叶面积是叶片功能性状的主要指标,表明中间锦鸡儿通过调节多个叶功能性状之间的关系以适应环境变化;降水量对2005年、1975年与1987年种植的中间锦鸡儿生长速率影响显著,对1996年的生长速率影响不大。综上所述,不同林龄中间锦鸡儿叶片通过多功能性状组合变异对年际降水量变化进行响应,以较好地适应干旱区环境。Precipitation,as an important source of water for vegetation in arid region,plays an important role in regulating leaf functional characteristics,growth and development of communities of Caragana liouana.To reveal the adaptive strategies employed by C.liouana to thrive in the arid environment of the desert area,we investigated the variation characteristics of leaf functional traits of C.liouana and analyzed its response mechanism to inter-annual precipitation changes in different plantations of Yanchi,Ningxia in this study.The results showed that:(1)The degree of intraspecific variation in the leaf blades of C.liouana of different ages of stand was high.(2)PCA analysis showed that leaf length(LL),leaf width(LW),leaf fresh weight(LFW),leaf dry weight(LDW)and leaf area(LA)were the main indicators of leaf functional traits,and showed a significant positive correlation(P<0.01),suggesting that the C.liouana plantations could adapt to the environmental changes by regulating the functional combination relationship between of multiple leaf functional traits(3)Along with the changes of precipitation,the growth rate variations of 2005,1975 and 1987 varied significantly,but not in 1996.In summary,the results showed that the leaf functional traits of C.liouana in different plantatons could respond to the inter-annual changes of precipitation through multi-functional traits variation and combinations,which made it better to adapt to the environment of the arid zone.

关 键 词：中间锦鸡儿 叶功能性状 降水量 不同林龄 

分 类 号：S793.3[农业科学—林木遗传育种]