水分胁迫下增施氮、磷对刺槐无性系苗木光合特性的影响  

Effects of increased nitrogen and phosphorus on photosynthetic characteristics of Robinia pseudoacacia clonal seedlings under water stress

作　　者：何明[1] 翟明普[2] 曹帮华[3] 

机构地区：[1]浙江林学院森林培育学科 [2]北京林业大学省部共建森林培育与保护教育部重点实验室 [3]山东农业大学森林培育学科

出　　处：《北京林业大学学报》2009年第6期116-120,共5页Journal of Beijing Forestry University

基　　金："十一五"国家科技支撑计划项目(2006BAD03A11-04)

摘　　要：通过对两个刺槐无性系苗木在光照培养箱内进行盆栽,采用正交试验设计的方法,研究不同水分胁迫水平下增施氮磷对两个刺槐无性系苗木光合特性的影响。对光合光响应曲线、最大净光合速率、光饱和点、光补偿点和叶绿素含量进行分析,结果表明:随干旱程度加深,干旱前期氮磷交互作用对刺槐叶片光饱和点和光补偿点影响显著,干旱后期差异不显著。比较两个刺槐无性系苗木的光合特性得出,L1(鲁刺一号)比W1(皖刺一号)更为耐旱。With orthogonal experimental design,potted seedlings of two black locust clones were grown in a light incubator to study the effects of increased nitrogen and phosphorus on photosynthetic characteristics of the seedlings under different levels of water stress. Analyses of photosynthesis-light response curve,P n max ,light saturation point （LSP）,light compensation point （LCP） and the content of chlorophylls showed that with increased drought,LSP and LCP were influenced significantly by the interaction between nitrogen and phosphorus at the early stage of water stress,which was not significant at the late stage of water stress. Based on comparison between photosynthetic characteristics of the two black locust clones,it was concluded that L1 was more tolerant of drought than W1.

关 键 词：刺槐 光合特性 氮 磷 

分 类 号：S718.43[农业科学—林学]