XIANG Jian-jun,WANG Pei-lan,ZHU Ning-hua,et al.Study on the Photosynthesis Characteristics of the Rare Species in Wulingyuan Area[J].Northern Horticulture,2014,38(13):69-72.
武陵源珍稀树种幼树的光合特性研究
- Title:
- Study on the Photosynthesis Characteristics of the Rare Species in Wulingyuan Area
- 文章编号:
- 1001-0009（2014）13-0069-04
- Keywords:
- Wulingyuan area; rare tree species; photosynthetic parameters; photosynthetic characteristics
- 分类号:
- Q 945
- 文献标志码:
- A
- 摘要:
- 以张家界植物园移栽的香果树、小花木荷和长果安息香幼树为试材，通过动态监测4种光合特征参数，对3个不同珍稀树种的光合特性进行比较研究，以期为珍稀树种保护提供理论依据。结果表明：3个树种间的光合特性存在明显差异，其中小花木荷光合能力最强。长果安息香、香果树和小花木荷的光合作用日变化均呈双峰型，都存在光合午休现象。小花木荷能充分利用午后丰富的光热资源，光合午休持续的时间短，故而小花木荷的光合速率要明显高于香果树和长果安息香。3个树种的Pn-PRA曲线变化趋势基本保持一致。在PRA为0~200 μmol·m-2·s-1范围时，净光合速率Pn近乎呈直线上升；在PRA为600~900 μmol·m-2·s-1左右时，最大值出现。但是不同树种间最大Pn存在显著差异，尤其是小花木荷光合能力远远超过其它2个树种。
- Abstract:
- Taking Emmenopterys henry，Schima parviflora and Changiostyrax raxdolichocarpa?that transplanted to Zhangjiajie botanical garden as test material，by the dynamic monitoring of 4 photosynthetic characteristic parameters，photosynthetic characters of 3 different rare tree were studied and compared,in order to provide a theoretical basis for the protection of rare species.The results showed that there were obvious differences in three species，and Schima parviflora was the best.The diurnal changes curves of photosynthetic rate of three species were all taken on a double peak curve，and all had ‘noon break’.The former was higher than the last two.The PRA curves of net photosynthetic rate of all the three species were similar.It presented vertical line ascending in the range of PRA 0~200 μmol·m-2·s-1，then the maximum appears when PRA raise to 600~900 μmol·m-2·s-1.But there was significant differences in the Pn.Among them，Schima parviflora had a distinct advantage.
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备注/Memo
第一作者简介：向建军（1970-），男，湖南桑植人，本科，林业工程师，研究方向为森林培育。E-mail：2490374229@qq.com.