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- Title
塞罕坝华北落叶松针叶光响应指标变化规律及其影响因素.
- Authors
周颖; 张泽文; 温烁; 孙赫; 刘强
- Abstract
We examined the differences of maximum light use efficiency (LUEmax), most effective light intensity (PARe), light compensation point (LCP) and light saturation point (LSP) in different vertical positions and different phenological periods of tree crown in Larix principis-rupprechtii plantation in Saihanba Mechanical Forest Farm of Hebei Province. We analyzed the main influencing factors for all the variables. The results showed that LUEmax increased with the increasing crown depth, and that PARe, LCP and LSP decreased with the increasing crown depth. Such a result indicated that upper crown had higher utilization efficiency to strong light and that the lower crown was more efficient to adapt to weak light environment. During the leaf development in the growth period, the LUEmax approximately increased except in July, while the changes of other photosynthetic-light factors showed a tendency of unimodal curve. Environmental factors were significantly correlated with the indices of light response, mainly due to the stress reaction of leaf stomata to surrounding environment. Understanding the spatial and seasonal changes of the photosynthetic-light indicators was important for formulating scientific management measures, optimizing stand structure, improving local microenvironment and maximizing forest productivity.
- Subjects
HEBEI Sheng (China); CROWNS (Botany); LEAF development; LEAF growth; FOREST productivity; TREE crops
- Publication
Yingyong Shengtai Xuebao, 2021, Vol 32, Issue 5, p1690
- ISSN
1001-9332
- Publication type
Article
- DOI
10.13287/j.1001-9332.202105.002