苹果梨叶片净光合速率变化规律的研究  

Regularity of Net Photosynthesis Rate of Pingguoli Leaves

作　　者：石岩 刘冰雁 曲柏宏[3] 

机构地区：[1]长春经济技术开发区住房保障和公用事业服务中心,吉林长春130000 [2]延边朝鲜族自治州农业科学院,吉林龙井133400 [3]延边大学,吉林延吉133002

出　　处：《安徽农业科学》2013年第14期6119-6122,共4页Journal of Anhui Agricultural Sciences

摘　　要：[目的]研究苹果梨不同枝条叶片净光合速率(Pn)的变化规律,探讨苹果梨"光午休"现象产生的原因。[方法]以延边地区苹果梨树为试材,使用英国生产的LCi便携式光合仪,通过测定苹果梨叶片的各种光合作用参数,研究苹果梨不同枝条叶片净光合速率的变化规律。[结果]苹果梨叶片的净光合速率日变化和年变化规律均呈双峰曲线,夏季中午时有明显的"光午休"现象。新梢、无果短枝和有果短枝叶片的净光合速率日变化规律相似。[结论]7、8、9月苹果梨净光合速率的日变化较为剧烈,果实的成长能促进叶片的光合作用,有果短枝叶片净光合速率最高。[ Objective ] The regularity of net photosynthesis rate of Pingguoli leaves was studied, and the causes of midday rest phenomenon of Pingguoli were analyzed. [ Method] Pingguoli tree in Yanbian area was chosen as the material to study all kinds of photosynthesis parameter of Pingguoli leaves using LCi portable photosynthesis system which was produced in Britain. [ Result] On the sunny day during growth season, Pn of Pingguoli leaves showed bimodal curve in day variation and annual variation which had the obvious midday rest phenomenon in summer. The daily variation regularity of Pn was similar with those of the one year news shoots, the non-fruit short shoots and bear fruit short shoots. [ Conclu- sion ] Pn of Pingguoli kept at a relatively higher value from July to September. Fruits could promote photosynthesis of leaves. Pn value of bear fruit short shoots was higher than those of one year new shoots and non-fruit short shoots from July to September.

关 键 词：苹果梨 净光合速率 “光午休” 

分 类 号：S661.2[农业科学—果树学]