中文摘要：

为了了解红提和摩尔多瓦的光合生理适应性,在大田条件下,使用Li-6400便携式光合仪测定了2个葡萄品种生长期内的光合作用日变化、光响应和CO2响应曲线.结果表明：①摩尔多瓦叶片的净光合速率（Pn）日变化规律在7月和8月为双峰型曲线,具有光合＂午休＂现象,在6月则为单峰曲线.红提在生长期内则均为单峰曲线;②除7月外,6月和8月摩尔多瓦的气孔导度（Gs）、蒸腾速率（E）及水分利用效率（WUE）均高于红提;③红提具有较高的表观量子效率（AQY）,而摩尔多瓦则具有较高的光饱和点（LSP）、光补偿点（LCP）、暗呼吸速率（Rd）和最大净光合速率（Pnmax）;④摩尔多瓦叶片的光合能力（Amax）、CO2饱和点（CSP）、最大羧化速率（Vcmax）、最大电子传递速率（Jmax）以及光呼吸速率（Rp）均高于红提.总体上,在其生长期内,摩尔多瓦光合作用表现出对当地环境良好的适应特征,同时其光能利用能力和CO2利用能力也都高于红提,这些特性对其高产具有重要意义.

英文摘要：

In order to understand the photosynthetic physiological adaptability, diurnal courses of net photosynthetic rate （Pn）, light response curves and CO2 response curves of 2 grapevine cuhivars （ Vitis vinifera L. and Vitis vinifera L. ） were measured by Li -6400 portable photosynthetic system. The results showed that：（1） The diurnal course of Pn of V. vinifera L. presented a double peak curve with an evidently midday depression in July and August, a single peak curve in June was also observed. By contrast, diurnal course of Pn of V. vinifera L. manifested single peak curve during the whole experimental period. （2） except for July, the stomatal conductance （ Gs ）, evaporation rate （E） and water use efficiency （EUE） were significantly higher than that of V. vingfera L.. （3） V. vinifera L. had a higher apparent quantum yield （ AQY）, whilst Vitis vinifera L. had a higher light saturation point （LSP） ,light compensation point （LCP）,maximum photosynthetic rate （P.max） and dark respiration rate （Ra ）. （4） point （CSP） ,maximum carboxylation rate （Vcmax） ,maximum electron transportation rate （Jmax） and photorespiration rate （Rp）. Base on those observations, we postulated that the V. vinifera L. has a better adaptability and photosynthetic ability than that of V. vinifera L. ,which probably indicate its high yield.