[1]WANG Fugang,XU Weizhou,KANG Furen,et al.Photosynthetic Light-Response Curves of Populus simonii Under Different Slope Aspects[J].Research of Soil and Water Conservation,2015,22(06):177-182.
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Photosynthetic Light-Response Curves of Populus simonii Under Different Slope Aspects
Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
22
Number of periods:
2015 06
Page number:
177-182
Column:
Public date:
2015-12-28
- Title:
- Photosynthetic Light-Response Curves of Populus simonii Under Different Slope Aspects
- CLC:
- Q945.11;S718.51+1
- DOI:
- -
- Abstract:
- For the study of photosynthetic physiological characteristics of Populus simonii under different slope aspect in the Loess hilly and gully Region. Photosynthetic light-response curves of those species which are located on north-facing slope, half-north-facing, half-south-facing and south-facing slopes were investigated. Results indicated that the modified rectangular hyperbola model could well discribe the photosynthesis-light response curves of Populus simonii under different slope aspects, and there were no photosynthesis-photoinhibition of those species during their growing periods. The maximum net photosynthetic rate (Pmax) of Populus simonii on north-facing slope in late May or mid September were significantly higher than the other three slope aspects , and those values of the species under any of the four slope conditions were significantly higher in late July. In late May, the apparent quantum efficiency (AQE) of Populus simonii under half-south-facing or south-facing slopes conditions was significantly higher than those under north-facing slope and half-north-facing conditions. Under four slope aspect conditions, the light saturation points (LSP) of Populus simonii in late May were significantly lower than those in late July or mid September, and the light compensation points (LCP) or dark respiration rate (Rd) in mid September were significantly lower than those in late May and late July. In late May, the water use efficiency(WUE) was significantly higher on north-facing slope, and the value was significantly higher on half-north-facing slope in late July, while in mid September, the values were significantly higher under north-facing and half-north-facing slope. The best order of slope aspects in the loess hill abd gully region was north-facing slope > half-north-facing > half-south-facing > south-facing slopes.
- References:
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