Responses of Photosynthetic Characteristics to Different Altitudes of <i>Quercus aquifolioides</i>

Ning Peng; Wang Fei; Cheng Xiaomao; Huang Xiaoxia

doi:10.11929/j.swfu.202006067

Journal of Southwest Forestry University > 2021 > 41(6): 47-53. > DOI: 10.11929/j.swfu.202006067

Ning Peng, Wang Fei, Cheng Xiaomao, Huang Xiaoxia. Responses of Photosynthetic Characteristics to Different Altitudes of Quercus aquifolioides[J]. Journal of Southwest Forestry University, 2021, 41(6): 47-53. DOI: 10.11929/j.swfu.202006067

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Responses of Photosynthetic Characteristics to Different Altitudes of Quercus aquifolioides

College of Landscape Architecture and Horticulture, Landscape Architecture Engineering Research Center of National Forestry and Grassland Administration in Southwest China, Southwest Forestry University, Kunming Yunnan 650233, China

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Received Date: June 23, 2020
Revised Date: August 01, 2020
Available Online: October 14, 2020
Published Date: November 19, 2021

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Abstract

Abstract

The leaf photosynthesis and nutrient accumulation of Quercus aquifolioides were studied at different altitudes. The results are as follow: the average leaf areaand specific leaf area of Q. aquifolioides presented the change trend of first increasing and then decreasing with the increase of altitude, reaching the maximum value at 3050 m; the length-width ratio of leaves was significantly lower than other elevations at 2750 m and 3050 m. The instantaneous maximum net photosynthetic rate, transpiration rate, stomatal conductance, and intercellular CO₂ concentration, showed a change pattern of first increasing and then decreasing with the increase of altitude. The contents of C and N per area decreased first and then increased with the increase of altitude, while the content of P per area first increased and then decreased with elevation, and the turning point was all at 3050 m. The photosynthetic nitrogen utilization efficiency and long-term nitrogen utilization efficiency reached their maximum value at 3050 m. The δ¹³C value decreases first and then increases with the increase of altitude, reaching the lowest level at 3050 m and the highest level at 3500 m respectively. In conclusion, it was concluded that the altitude of 3050 m is the most suitable growth area for Q. aquifolioides with the highest photosynthetic efficiency and faster growth. The environment with high altitude inhibited the growth and photosynthetic carbon assimilation while improved the water utilization efficiency of Q. aquifolioides.
- altitude,
- Quercus aquifolioides,
- photosynthetic characteristic,
- nutrient element

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