枣不同品种光合特征及叶片解剖结构的研究  

Photosynthetic Characteristics and Leaf Anatomical Structure of Different Chinese Dates

作　　者：刘汉云[1] 李铭[1] 张步青[1] 王丽艳[1] 宋丽青 

机构地区：[1]山西农业大学林学院,山西太谷030801 [2]晋中市林业局经济林站,山西晋中030600

出　　处：《经济林研究》2009年第2期10-15,共6页Non-wood Forest Research

摘　　要：利用Li-6400便携式光合作用测定仪等仪器测试了壶瓶枣、赞皇枣和梨枣的光合速率与叶片构造特征。结果表明:赞皇枣光饱和点为1408.25μmol·m-2·s-1,光补偿点6.67μmol·m-2·s-1;梨枣光饱和点1387.66μmol·m-2·s-1,光补偿点10.4μmol·m-2·s-1;壶瓶枣光饱和点接近1500μmol·m-2·s-1。在较高光照强度时枣树蒸腾比率提高,叶片对水的利用率增高。三品种叶片下表皮平均气孔密度为70/mm2,且枣树单叶面积小,从光合特征及叶片结构方面解释了枣树喜光耐干旱的生理机制,为枣树优质丰产奠定了理论基础。Photosynthetic rate and leaf structural features of Huping date, Zanhuang date and Li date Were tested using Li--6400 portable photosynthesis system. As the results showed： light saturation point（LSP） of Zanhuang date was 1 408.25 μmol·m^-2·s^-1 and light compensation point （LCP） was 6.67 μmol·m^-2·s^-1; LSP of Li date was 1 387.66μmol·m^-2·s^-1 and LCP was 10.4μmol·m^-2·s^-1,LSP of Huping date reached 1500μmol·m^-2·s^-1. Transpiration ratio and water utilization increased under higher light intensity. Average stomatal density of lower leaf epidermis was 70 /mm^2, which explained physiological mechanism from the aspects of photosynthetic characteristics and leaf structure why Chinese date was light-loving and drought-resistant, and provided theoretical basis for high quality and yield.

关 键 词：枣 光合作用 净光合速率 光饱和点 气孔 

分 类 号：S665.1[农业科学—果树学]