不同种植年限中间锦鸡儿叶片功能性状的差异性研究  

Differences in Leaf Functional Traits of Caragana intermedia Planted in Different Years

作　　者：李琴[1,2,3] 王磊 张雪[1,2,3] 潘昱伶[1,2,3] 王玥 余殿[4] LI Qin;WANG Lei;ZHANG Xue;PAN Yu-ling;WANG Yue;YU Dian(School of Ecology and Environment,Ningxia University,Yinchuan 750021,Ningxia,China;Breeding Base for Sate Key Laboratory of Land Degradation and Ecological Restoration in Northwestern China,Yinchuan 750021,Ningxia,China;Key Laboratory for Restoration and Reconstruction of Degraded Ecosystems in Northwestern China of Ministry of Education,Ningxia University,Yinchuan 750021,Ningxia,China;Ningxia Habahu National Nature Reserve Administration,Yanchi 751500,Ningxia,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]宁夏哈巴湖国家级自然保护区管理局,宁夏盐池751500

出　　处：《林业科学研究》2023年第4期173-182,共10页Forest Research

基　　金：宁夏重点研发计划项目(2021BEG03008);国家青年科学基金项目(32100307);宁夏领军人才项目(2021GKLRLX13);宁夏回族自治区西部一流学科建设项目(NXYLXK2017B06)。

摘　　要：[目的]比较分析不同种植年限中间锦鸡儿叶片功能性状之间的差异性,为中间锦鸡儿响应干旱区环境变化的适应机制研究提供科学依据。[方法]以16、25、34和46 a 4个不同种植年限中间锦鸡儿为研究对象,比较分析不同种植年限中间锦鸡儿叶片功能性状之间的差异性。[结果]不同种植年限中间锦鸡儿叶片形态功能性状存在显著差异,46 a中间锦鸡儿叶片干物质含量(LDMC)显著高于16、25、34 a(P<0.05),比叶面积(SLA)显著高于16、34 a(P<0.05),叶长(LL)、叶宽(LW)、叶片鲜质量(LFW)、叶片干质量(LDW)、叶面积(LA)均呈现出先升高后降低的趋势,整体表现出25 a>34 a>16 a>46 a的生长趋势;中间锦鸡儿叶片形态功能性状变异系数为7.57%~46.98%,其中16 a中间锦鸡儿的LFW、LDW、LA和SLA变异系数最高。叶片结构功能性状中,46 a中间锦鸡儿叶片VB与USA显著低于34 a(P<0.05),与16、25 a之间不存在显著差异。表皮气孔密度的变异程度较大,UEH与LEH呈极显著正相关(P<0.01),其余功能性状较为稳定。[结论]中间锦鸡儿人工林随着种植年限的增加,形成了从生物量快速生产到养分有效保存策略的转变,这也是其通过各个叶片功能性状间相互调节与权衡以更好适应干旱区资源、环境贫瘠的结果。[Objective]To compare the differences in leaf functional traits of Caragana intermedia plantations with different planting years for and provide a scientific basis for studying the adaptation mechanism of C.intermedia in response to environmental changes in the arid area.[Method]Based on the plantations with four different planting years(16,25,34,and 46a),we analyzed the leaf functional traits in C.intermedia.[Result]There were significant differences in the morphological and functional traits of leaves of C.intermedia planted in different years.The LDMC of C.intermedia with 46 years of age was significantly higher than those have ages of 16,25,and 34 a(P<0.05),and the SLA was significantly higher than that with ages of 16 and 34 a(P<0.05).LL,LW,LFW,LDW,and LA all increased first and then decreased,which showed a growth trend of 25 a>34 a>16 a>46 a.The coefficient of variation of leaf morphology and function traits of C.intermedia was 7.57%~46.98%,among which the coefficient of variation of LFW,LDW,LA and SLA of 16-year-old C.intermedia was the highest.Among the structural and functional traits of leaves,the VB and USA of C.intermedia with 46-year-old were significantly lower than those in with 34-year-old(P<0.05),and there was no significant difference between 16-year-old and 25-year-old.The stomatal density of the epidermis varied greatly.UEH and LEH showed a very significant positive correlation(P<0.01),and the rest of the functional traits were relatively stable.[Conclusion]Four plantations of C.intermedia have formed a transition from the rapid biomass production to the effective nutrient preservation strategy with the increase of age,which results in the mutual regulation and trade-off for adapting to the environmental deprivation in the arid zones.

关 键 词：中间锦鸡儿 叶片功能性状 不同种植年限 生存策略 

分 类 号：S718.43[农业科学—林学]