| 摘要: |
| [目的]分析山地和平地赤霞珠葡萄(Vitis vinifera L.cv Cabernet Sauvignon)的光合作用特性,为形成持续发展的葡萄与葡萄酒生产体系提供依据.[方法]采用LI-6400便携式光合测定仪,分析了陕西省耀州区山地和平地两个葡萄园中赤霞珠葡萄浆果膨大期叶片的净光合速率、蒸腾速率、胞间CO2浓度和气孔导度等生理生态指标.[结果]山地和平地赤霞珠葡萄的净光合速率日变化相似,均表现出双峰曲线,首峰出现在上午10:00,次峰小于首峰,出现在下午15:00以后;山地和平地赤霞珠葡萄叶片的净光合速率、蒸腾速率、胞间CO2浓度和叶绿素含量差异显著,水分利用效率和气孔导度差异不显著,在光响应曲线内的最大净光合速率和表观量子效率分别为14.40μmol/(m2·s),0.036和12.58 μmol/(m2·s),0.035,在CO2响应曲线内的最大净光合速率和羧化效率分别为23.99μmol/(m2·s),0.061和18.43 μmol/(m2·s),0.059,模拟曲线的R2值都大于0.94;不同海拔条件下净光合速率与PAR、蒸腾速率和气孔导度呈极显著正相关,与胞间CO2浓度呈显著负相关.[结论]山地条件下葡萄具有高光效和高产的光合特性. |
| 关键词: 渭北旱塬 赤霞珠 光合特性 浆果膨大期 |
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| 基金项目:农业部重点推广项目“黄土高原地区葡萄园保护性耕作试验示范”；西北农林科技大学青年科研专项(06ZR048) |
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| Studies on photosynthetic characteristics of Vitis vinifera L. cv. Cabernet sauvignon during berry expansion period in Weibei Rainfed Highland |
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| Abstract: |
| 【Objective】 The study was to analyze the photosynthesis characteristics of the grapevines (Cabernet Sauvignon) in the hilly area and the plain.【Method】 The photosynthesis characteristics of the grapevines (Cabernet Sauvignon) were studied with LI-6400 portable photosynthesis system in two vineyards in the Yaozhou area Shaanxi Province.【Result】 The results show that the diurnal variation of net photosynthetic rates of leaves in the mountain area or in the plain had similarities,showing double-peak curve.The first peak appeared at 10:00 and the second peak after 15:00 was smaller,with a lower value of the second peak than that of the first peak.The net photosynthetic rates,transpiration or intercellular CO2 concentration of leaves had prominence difference in the hilly and the plain,and water use efficiency or stomatal conductance had not prominence difference.In the Pn-PAR response curve,Pnmax and apparent quantum yield were 14.40 μmol/（m2·s）,0.036 and 12.58 μmol/（m2·s）,0.035.In the Pn-Ci response curve,they were 23.99 μmol/（m2·s）,0.061 and 18.43 μmol/（m2·s）,0.059.(R2＞0.94).The pigment content showed that the photosynthesis pigment in the hilly was evidently higher than that in the plain.Under different altitude conditions,the net photosynthetic rates had a significantly positive relationship with photosynthetic active radiation,transpiration and stomatal conductance,but an obvious negative relationship with intercellular CO2 concentration. 【Conclusion】 It indicates that the grapevines in the hilly can get a higher light effect and higher production than that in the plain. |
| Key words: Weibei Rainfed Highland Cabernet Sauvignon photosynthesis characteristics berry expansion period |
