草业科学2012，Vol.29Issue(3)：422-428,7.
水分和磷肥对达乌里胡枝子不同叶位叶绿素荧光参数特征的影响
Effects of water and phosphorus on chlorophyll fluorescence characteristics of different position leaves in Lespedeza daurica
摘要
Abstract
A pot experiment was used to determine the Chlorophyll fluorescence characteristics of different position leaves in Lespedeza daurica under three different water level（80% FC,60% FC and 40% FC） and two phosphorus treatments（0.1 Pg·kg-1 dry soil and no P addition）.The results of this study showed that the initial fluorescence（F0） and the maximum photochemical efficiency（Fv/Fm） of flag leaves were significantly lower those of middle leaves under moderate water stress and supply phosphorus,while there were no significant differences in maximal fluorescence（Fm）,implying that the PSⅡreaction center of flag leaves were less destroyed than the middle leaf and the light energy transformation efficiency of flag leaves was higher.The leaf quenching coefficient（NPQ） significantly decreased and the Fv/Fm values of flag leaf and new leaf under moderate water stress condition were significantly higher in supply phosphorus treatment,indicating that the light energy dissipation decreased and light energy transformation increased under water stress by addition of phosphorus,which suggested that the supply phosphorus improved the adaptive capacity of L.daurica to semiarid loess hilly-gully region.关键词
达乌里胡枝子/叶位/叶绿素荧光/水肥Key words
Lespedeza daurica/leave position/chlorophyll fluorescence/water and fertilizer分类
农业科技引用本文复制引用
段东平,徐炳成,牛富荣,徐伟洲..水分和磷肥对达乌里胡枝子不同叶位叶绿素荧光参数特征的影响[J].草业科学,2012,29(3):422-428,7.基金项目
基金项目：中国科学院重要方向项目 （）
国家自然科学基金 （）
西北农林科技大学基本科研业务费专项 （）
