雷公山亚高山灌丛常见植物叶片必需大量营养元素化学计量特征  

Stoichiometric characteristics of essential macronutrient in leaves of subalpine shrub common plants in Leigong Mountain

作　　者：罗绪强[1,2] 张桂玲[2,3] 阮英慧[1] 刘兴 杨鸿雁[1] 邓家彬[1] LUO Xu-qiang;ZHANG Gui-ling;RUAN Ying-hui;LIU Xing;YANG Hong-yan;DENG Jia-bin(School of Geography and Resource Sciences,Guizhou Education University,Guiyang 550018,China;Puding Karst Ecosystem Research Station,Chinese Academy of Sciences,Puding 562100,China;College of Chemistry and Materials Engineering,Guiyang University,Guiyang 550005,China)

机构地区：[1]贵州师范学院地理与资源科学学院,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]贵阳学院化学与材料工程学院,贵州贵阳550005

出　　处：《广东农业科学》2018年第8期73-80,共8页Guangdong Agricultural Sciences

基　　金：国家自然科学基金(41563007);贵州省优秀青年科技人才培养对象专项资金(黔科合人字[2015]21号);贵州省优秀科技教育人才省长资金(黔省专合字[2012]80号);贵州省高层次创新型人才资金(黔人领发[2015]3号)

摘　　要：为探讨自然保护区亚高山灌丛植物的养分状况及其环境适应性,以贵州雷公山国家级自然保护区亚高山灌丛7种常见植物为研究对象,分别对其叶片6种必需大量矿质营养元素(N、S、P、K、Ca、Mg)含量进行测定和分析。结果表明:该区亚高山灌丛常见植物叶片N、S、P、K、Ca、Mg含量分别为25.24、7.58、1.78、11.11、11.44、2.22 mg/g,变异系数分别为20.64%、8.30%、30.49%、15.69%、46.98%、43.82%;叶片内K/Mg、N/Mg、S/Mg、Ca/K、N/Ca、Ca/S、Ca/P、Mg/P相互影响较大,并对其他元素化学计量有较大影响;N/P、S/P、N/K、S/Mg、K/P、K/Mg、Ca/Mg、N/S、K/S在植物体内具有相对较强的内稳定性。小叶女贞(Ligustrum quihoui Carr.)、十大功劳[Mahonia fortunei(Lindl.)Fedde]、刺叶冬青(Ilex bioritsensis Hayata)属N制约型植物,粗榧[Cephalotaxus sinensis(Rehder et E.H.Wilson)H.L.Li]和箭竹(Fargesia spathacea Franch.)属P制约型植物,鲜黄小檗(Berberis diaphana Maxin.)和红果树(Stranvaesia davidiana Dcne.)生长受N和P共同限制。研究区植物具有P营养供应不足而S营养相对过剩的特征,Ca、Mg是该区植物为适应环境伸缩性地调整体内必需大量矿质营养元素化学计量的关键元素。To investigate the nutrient status and environmental adaptability of subalpine shrub plants in nature reserve,six kinds of elements(N,S,P,K,Ca,Mg)in the leaves of subalpine shrub common plants in Leigong Mountain were measured respectively.The results showed that the arithmetic mean values of N,S,P,K,Ca and Mg contents in the leaves of the subalpine shrub common plants in Leigong Mountain were 25.24,7.58,1.78,11.11,11.44 and 2.22 mg/g,respectively.The coefficients of variation were 20.64%,8.30%,30.49%,15.69%,46.98%,and43.82%,respectively.K/Mg,N/Mg,S/Mg,Ca/K,N/Ca,Ca/S,Ca/P and Mg/P in the leaf had a great influence on each other and had a great influence on the stoichiometry of other elements;N/P,S/P,N/K,S/Mg,K/P,K/Mg,Ca/Mg,N/S,K/S had relatively strong internal stability in plants.According to the element contents of N and P in plant leaves,Ligustrum quihoui Carr.Mahonia fortunei(Lindl.)Fedde and Ilex bioritsensis Hayata were almost defined as N limited plants,Cephalotaxus sinensis(Rehder et E.H.Wilson)H.L.Li and Fargesia spathacea Franch.were almost defined as P limited plants,the growth of Berberis diaphana Maxin.and Stranvaesia davidiana Dcne.were limited by both N and P.Plants in the study area were characterized by insufficient supply of P nutrition and relative excess of S nutrition.Ca and Mg were the key elements that plants adjust the elemental stoichiometry to adapt to the environment.

关 键 词：自然保护区 亚高山灌丛 常见植物 矿质营养元素 生态化学计量 环境适应性 

分 类 号：S718.557[农业科学—林学] Q948.11[生物学—植物学]