秦内径亚高山草甸30种草本植物的碳、氮分布研究

以秦岭佛坪国家级自然保护区内亚高山草甸30种草本植物为对象,研究了碳、氮在亚高山草甸植物中的分布情况.结果表明:碳、氮在植物组织中总的分布趋势为叶>茎>根,碳/氮在植物组织中的分布为茎>根>叶,方差分析显示碳、氮及碳/氮在植物根、茎、叶中的分布差异极显著(P<0.01).在单个植物的根、茎、叶中,碳、氮及碳/氮的分布具有种的特异性.在以其光合特征进行聚类分析得到的4个聚类组群中,碳、氮及碳/氮在每个组群根、茎、叶中的分布差异不显著(P>0.05).

Study on content of C and N contents of 30 plant species in Subalpine Meadow of Qinling Mountains

30 species in subalpine meadow of Qinling Mountains were selected to analyze the distribution pattern of the carbon and nitrogen contents.The results showed that the order of C and N content in plant tissue were leaves>shoots>roots,and the C/N ratio was shoots>roots>leaves.Results of One-way ANONA analysis indicated that the distribution of C,N and the C/N ratio in roots,shoots,leaves were significantly different(P<0.01)and species-specific,and the distribution in four groups based on their gas exchange traits had no significant difference(P>0.05) among roots,shoots and leaves.