作　　者： ; ; ; ; ;

机构地区： 辽宁工程技术大学

出　　处： 《干旱区研究》 2013年第2期236-241,共6页

摘　　要： 以阜新市主要园林树种为研究对象,分析各树种叶片C、N、P化学计量特征。结果表明:园林树种叶片C、N和P含量分别为496～664mg.g-1、7.5～26.6mg.g-1和1.0～2.2mg.g-1,C/N、C/P和N/P分别为22.4～74.3、262～522和5.4～13.8,且叶片N含量与C/N和N/P之间显著相关(P<0.001)。常绿针叶树种叶片N、P含量和N/P显著低于阔叶落叶树种(P<0.05),而C/N和C/P显著高于阔叶落叶树种(P<0.05);乔木树种叶片N含量和N/P显著高于灌木树种(P<0.05),而叶片P含量及C/N和C/P二者之间差异不显著(P>0.05),表明园林树种具有较高的储C能力及养分利用效率。根据叶片N/P发现,阜新市园林树种生长主要受N限制。 The values of stoichiometric properties of leaf C, N and P contents of 55 garden tree species in Fuxin city Liaoning Province, China were derived. The results showed that the C, N and P contents varied in ranges of 496-664, 7.5-26.6 mg. g^-1 andl.0-2.2 mg. g^-1 and theC/N, C/P and N/P in ranges of 22. 4 - 74. 3 262 - 522 and 5.4 - 13.8, respectively. Moreover, there was a significant correlation between leaf N and C/N or C/P （P 〈0. 001 ）. The leaf N and P contents and N/P of evergreen coniferous tree species were significantly high- er than those of broadleaf deciduous tree species （ P 〈 0, 05 ）, but C/N and C/P of evergreen coniferous tree spe- cies were significantly lower than those of broadleaf deciduous tree species （ P 〈 0.05 ）. The leaf N content and N/P of tree species were significantly higher than those of shrub species （ P 〈 0.05 ） , but the differences in P con- tent, C/P and C/P were not significant （ P 〉 0.05 ）. These results revealed that the C stomge capability and nutrient use efficiency of garden tree species were high. The garden tree species were N-limited in the study area.

关 键 词： 养分循环 园林植物 叶片 生态化学 辽宁

领　　域： [农业科学] [农业科学]