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OALib Journal期刊
ISSN: 2333-9721
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安徽石台亚热带常绿阔叶林植物叶中c、n、p特征分析
DOI: 10.3969/j.issn.1000-2006.2014.06.006, PP. 28-32
Keywords: 亚热带常绿阔叶林,c、n、p含量,化学计量,养分利用效率
Abstract:
以安徽石台亚热带常绿阔叶林植物叶片为研究对象,分析了植物叶中c、n、p含量以及它们之间的化学计量关系,讨论了不同类型植物叶片的化学计量特征。结果显示:所研究的28种植物物种间差异明显,叶片中c含量为400.08～519.36mg/g,n为5.15～15.39mg/g,p为0.30～0.97mg/g,m(c):m(n)范围为29.99～92.25、m(c):m(p)的范围为467.01～1443.81、m(n):m(p)的范围为10.01～29.29,且n与p、m(c):m(n)值与m(c):m(p)值之间呈现显著的正相关关系,m(n):m(p)的变化主要由p含量决定。不同生活型植物m(c):m(n)值从大到小表现为灌木(59.68)>乔木(51.56)>草本和藤本植物(44.50),草本和藤本植物与灌木之间m(c):m(n)差异显著;不同植物m(c):m(p)值从大到小表现为灌木(1043.4)>草本和藤本植物(818.78)>乔木(808.35),灌木与乔木、草本和藤本植物都存在显著差异。该地区灌木m(c):m(n)值和m(c):m(p)值均最高,说明灌木对n、p的利用效率最高。3种类型植物m(n):m(p)值均大于16,说明该地区常绿阔叶林主要受p限制。虽然植物受p限制,但其m(c):m(p)值含量较高,说明植物对其生长受限的元素利用效率会更高,这反映了植物对环境适应的一种对策。
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