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

罗绪强1; 2; 张桂玲2; 3; 阮英慧1; 刘　兴1; 2; 杨鸿雁1; 邓家彬1

文章摘要

罗绪强1，2，张桂玲2，3，阮英慧1，刘　兴1，2，杨鸿雁1，邓家彬1.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[J].广东农业科学,2018,45(8):73-80

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

DOI：10.16768/j.issn.1004-874X.2018.08.011

中文关键词: 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

英文关键词: nature reserve subalpine shrub common plant mineral nutrient ecological stoichiometric environmental adaptation

基金项目: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）

作者	单位
罗绪强1，2，张桂玲2，3，阮英慧1，刘　兴1，2，杨鸿雁1，邓家彬1	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

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中文摘要:

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。

英文摘要:

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%, and 43.82%, 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.

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