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Chinese Journal of Ecology. 2011, (01) Core

Characteristics of plant leaf nitrogen and phosphorus stoichiometry in relation to soil nitrogen and phosphorus concentrations in Songnen Plain meadowChinese Full Text

DING Fan1,2,LIAN Pei-yong1,2,ZENG De-hui1 (1Institute of Applied Ecology,Chinese Academy of Sciences,Shenyang 110016,China; 2Graduate University of Chinese Academy of Sciences,Beijing 100049,China)

Abstract: We measured total nitrogen （N） and total phosphorus （P） concentrations in leaves of Leymus chinensis,Phragmites communis and Lespedeza hedysaroides in Songnen Plain meadow,and analyzed their relationship with soil total N and total P concentrations. The results showed that foliar total N concentration differed significantly among three species （P＜0.05）,while foliar total P concentrations did not show significant difference （P＞0.05）. The leaf N concentration of the three species had no significant correlation with soil total N concentrations （P＞0.05）,while the leaf N:P ratio was significantly negatively correlated with soil total P concentrations （P＜0.05）,suggesting that in our study area,different plant species had great difference in their leaf N concentration,but less difference in their leaf P concentration. Compared with leaf N and P concentrations,leaf N:P ratio was more related to soil N and P concentrations. In addition,the growth of Leymus chinensis and Lespedeza hedysaroides in study area was P-limited,and thereby,appropriate application of P fertilizer could be considered.
Keywords：

N:P ratio; total N concentration; total P concentration; correlation.;

  • DOI：

    10.13292/j.1000-4890.2011.0029

  • Series：

  • Subject：

  • Classification Code：

    S812

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