影响杨树苗期光合速率多因素研究  

The several affecting factors on the photosynthetic rate of poplar in seedling stage

作　　者：吴敏[1] 汤玉喜[1] 唐洁[1] 李永进[1] 吴立勋[1] 

机构地区：[1]湖南省林业科学院,湖南长沙410004

出　　处：《湖南林业科技》2015年第6期94-98,共5页Hunan Forestry Science & Technology

基　　金：湖南省林业厅科技计划项目"杨树工程结构材定向培育及增值利用关键技术研究与示范"(XLK201506)

摘　　要：为了显示光合测定时所选叶片性状及测定时间对光合速率的影响，试验采用其他试验条件一致、研究目的条件按设计等级差异的方法进行光合速率的测定。试验结果显示：在同一光通量条件下，1年生苗干上叶的净光合速率可分为光合速率上升段、光合速率平稳段、光合速率下降段3个区分段；四足螨不同为害程度叶的净光合速率下降13．2％-27．3％；杨树苗的净光合速率，上午极显著高于下午。ZH-17、XL-90无性系，在同一时间所发生的叶片总数相近，但保有功能旺盛叶的数量zH-17比xL-90少，前者是后者的69％。因此，在植物光合速率测定时，不仅要选定叶龄相近、无病虫为害的正常叶，还要注意测定时间，不把上午测定结果与下午比较。In order to show the effects on the photosynthetic rateof the selected leaf characters and the testing time, the experiment used the method to determine the rate of photosynthetic rate by the different class of the research purpose in same others conditions. The test results show that, under the same flux conditions, one year seedling stem leaf＇ s net photosynthetic rate can be divided into 3 section of photosynthetic rate of ascent, photosyntbefie rate stable period, photo- synthetic rate decreased; the leaf net photesynthetie rate by mite bug of different damage decreased 13. 2% - 27. 3% ; The net photosyuthetie rate of poplar seedlings in the morning extremely significantly higher than it in the afternoon. Al- though ZH - 17 and XL -90 elones in the same time and similar total number of leaves, but retains the quantity ZH - 17 function effective leaves was less than XL - 90 69% of XL - 90. Therefore, in plant photosynthetic rate determination, not only to selected similar leaf age, no plant diseases and insect pests of normal leaf, but also pay attention to the deter- ruination of time, don＇ t compare the determination results with the morning and afternoon.

关 键 词：叶龄 螨虫为害 测定时间 净光合速率 杨树苗 

分 类 号：S792.11[农业科学—林木遗传育种]