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整枝方式對茄子光合成能力之影響
The Influence of Eggplant Training on Leaf Photosynthetic Rate
摘要
本研究的目的在於探討不同整枝處理（水平整枝與V型整枝）對茄子葉片光合成能力之影響。試驗結果顯示茄子冠層的透光率，以V型整枝處理的株冠層較薄，葉層排列緊密，對光截取能力較佳。不同葉位的光合成速率，不同處理間均以盛花下第一片葉的光合成速率最高，其次依序為盛花上第一片葉、盛花下第三、五及七片葉。不同時期單葉光合成速率則以在5月27日生育初期之V型整枝處理可達17.48 μmol CO2/m^2/s，而對照之水平整枝處理僅為16.48 μmol CO2/m^2/s；但在8月27日生育中期，V型整枝處理因棚架遮蔭效應之故，僅為15.90 μmol CO2/m^2/s，而以水平整枝處理18.37 μmol CO2/m^2/s的表現較佳。不同整枝處理間，日變化情形均以上午9～11點為一日中光合成速率的最高峰。
並列摘要
The purpose of this research was to assess the influence of different training (H- and V-type) on photosynthetic rate of eggplant leaves. Results indicated that the light transmission of eggplant canopy in V-type training had thinner leaf layer and higher light interception than H-type training. The net photosynthetic rate was the highest at full blooming stage on lower 1 leaf followed by upper 1 leaf, lower 3, 5 and 7 leaf. The net photosynthetic rate of each leaf in H-type training detected at the early growth stage on May 27, was 16.48 μmol CO2/m^2/s which is lower than the V-type of 17.48 μmol CO2/m^2/s. At the mid growth stage on August 27, the net photosynthesis rate of H-type was 18.37 μmol CO2/m^2/s which is higher than that of V-type at 15.90 μmol CO2/m^2/s. The highest level of photosynthesis rate appeared at 9~11 AM. in both training treatment.
延伸閱讀
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