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以3年生德国引种的酿酒葡萄品种为试材,测定不同月份葡萄幼龄植株光合指标,研究葡萄品种光合作用的月份变化规律。结果表明:在整个生长季节内,德国酿酒品种的光合作用呈现明显的月份变化规律。不同品种净光合速率基本呈现双峰曲线分布,最高值为‘Souyigniergris’(15.04、18.06μmol·m-2·s-1)出现在5、7月。同时不同品种蒸腾速率、气孔导度、胞间CO2浓度随月份的变化有的呈单峰曲线分布,有的呈双峰曲线分布。但‘Souyigniergris’蒸腾速率在6—8月一直保持在较高水平。气孔导度和蒸腾速率之间呈正相关关系。因此,7个葡萄品种中‘Souyigniergris’光合作用最强,增产的潜力大,‘Cabernet Cortis’蒸腾速率最小,抗旱能力优于其它品种。
Three-year-old grape varieties introduced from Germany were used as materials to measure the photosynthesis of juvenile young plants in different months, and to study the monthly variation of photosynthesis of grape cultivars. The results showed that during the whole growing season, photosynthesis of German wine varieties showed obvious changes in the month. The net photosynthetic rate of different cultivars showed a bimodal distribution, with the highest value of ’Souyigniergris’ (15.04, 18.06 μmol · m-2 · s-1) in May and July. At the same time, the transpiration rate, stomatal conductance and intercellular CO2 concentration of different cultivars showed single peak curve distribution with the change of the month, while some showed double peak curve distribution. However, the ’Souyigniergris’ transpiration rate remained at a high level during June-August. There was a positive correlation between stomatal conductance and transpiration rate. Therefore, among the seven grape cultivars, ’Souyigniergris’ had the highest photosynthesis and the potential for yield increase. ’Cabernet Cortis’ had the lowest transpiration rate and better drought resistance than other varieties.