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| 4个桤木品系净光合速率动态特征及其差异性研究 | |
| 引用本文： | 陈明皋,陈建华,徐清乾,周小玲,王旭军.4个桤木品系净光合速率动态特征及其差异性研究[J].林业科学研究,2008,21(4):534-541. |
| 作者姓名： | 陈明皋 陈建华 徐清乾 周小玲 王旭军 |
| 作者单位： | 1. 中南林业科技大学,湖南,长沙,410004;湖南省林木无性系育种技术实验室,湖南,长沙,410004 2. 中南林业科技大学,湖南,长沙,410004 3. 湖南省林木无性系育种技术实验室,湖南,长沙,410004;湖南省林业科学院,湖南,长沙,410004 |
| 基金项目： | 国家林业局长江-2;国家重点工程科技支持项目 |
| 摘 要： | 对J5、J10、H1、H12等4个桤木品系苗木光合动态特征及差异性研究结果表明:(1)4个桤木品系上、下部叶的Pn日变化呈现出单峰型和双峰型两种曲线类型;在同一时间Pn日变化曲线上的同一时刻,H12、J10品系的Pn均高于H1、J5品系;(2)在整个生长季节,4个桤木品系苗木的上部叶片Pn的日变化最大值、月均值均明显高于相对应品系下部叶pn的日变化最大值和月均值;H12、J10品系上、下部叶的Pn日变化的最大值和月均值分别高于H1、J5的相对应的光合特征值;在栽培时选取H12和J10具有明显的生长优势;(3)方差分析表明:不同品系、不同树冠部位、不同月份净光合速率(Pn)均达到极显著差异水平,J10和H12的Pn明显高于J5、H1的Pn;上部叶的Pn显著高于下部叶的;一年中以6月份的Pn为最高,10月份最小;净光合速率以上部叶的贡献占主要地位. |
| 关 键 词： | 四川桤木品系 光合特征 差异性 |
| 收稿时间： | 2008/3/20 0:00:00 |
Study on the Dynamic Characteristics and Difference of Net Photosynthetic Rate of 4 Alnus cremastogyne Varieties |
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| CHEN Ming-gao,CHEN Jian-hu,XU Qing-qian,ZHOU Xiao-ling and WANG Xu-jun.Study on the Dynamic Characteristics and Difference of Net Photosynthetic Rate of 4 Alnus cremastogyne Varieties[J].Forest Research,2008,21(4):534-541. | |
| Authors: | CHEN Ming-gao CHEN Jian-hu XU Qing-qian ZHOU Xiao-ling and WANG Xu-jun |
| Institution: | Central South University of Forestry & Technology,Changsha 410004,Hu'nan,China;The Trees Clone Breeding Key Laboratory of Hu'nan Province,Changsha 410004,Hu'nan,China;Central South University of Forestry & Technology,Changsha 410004,Hu'nan,China;The Trees Clone Breeding Key Laboratory of Hu'nan Province,Changsha 410004,Hu'nan,China;Hu'nan Academy of Forestry,Changsha 410004,Hu'nan,China;The Trees Clone Breeding Key Laboratory of Hu'nan Province,Changsha 410004,Hu'nan,China;Hu'nan Academy of Forestry,Changsha 410004,Hu'nan,China;The Trees Clone Breeding Key Laboratory of Hu'nan Province,Changsha 410004,Hu'nan,China;Hu'nan Academy of Forestry,Changsha 410004,Hu'nan,China |
| Abstract: | The dynamic characteristics of net photosynthetic rate(Pn) and theirs difference among four varieties of Alnus crematogyne,namely,J5,J10,H1,H12,were conducted.The results were as follows:(1)The diurnal variation of Pn of these four varieties was generally classified as single-peak curve or double-peak one;and Pn of H12 and J10 was higher than that of H1 and J5 at the same time.(2)During the whole growing season,the monthly maximum value and average value of Pn of the diurnal variation of the upper crown were higher than that of the lower one.Despite of the leaf position,the two photosynthetic eigenvalue described above of H12 and J10 were obviously higher than that of H1 and J5,respectively.H12 and J10 had extremely growth significant,so they should be selected when cultivation;(3)Analysis of variance showed that Pn among different varieties,different position and different months reached highly significant difference.The Pn of J10 and H12 were remarkably higher than that of J5 and H1,and the upper crown was higher than lower crown too;and the maximum value monthly of Pn showed in June,while the minimum in Octomber;and as far as the contribution ratio of Pn was concerned,the upper crown was in the highest flight. |
| Keywords: | Alnus cremastogyne varieties photosynthetic characteristics difference |
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