不同生育期水分胁迫对葡萄生长生理特性的影响

Effect of Water Stress at Different Fertility Stages on Physiological Characteristics of Grape Growth

为了研究不同生育期水分胁迫对鲜食葡萄光合作用和果实品质的影响,以玫瑰香葡萄为对象开展设施研究,在萌芽期、新梢生长期、开花期、果实膨大期、着色期以及全生育期分别进行水分胁迫,并以全生育期充分灌溉作为对照组,研究不同生育期水分胁迫对葡萄光合特性、产量和果实品质的影响。结果表明:新梢生长期葡萄叶片净光合速率受水分胁迫影响最小,与对照组相比减小8.96%;果实膨大期葡萄叶片净光合速率受水分胁迫影响最大,与对照组相比减小13.14%;萌芽期水分胁迫提产效果显著,可增产9.87%;着色期水分胁迫有利于果实维生素C以及还原糖的积累,降低可滴定酸的含量,提升果实品质,且对产量无显著影响。

To study the effects of water stress at different growth stages on photosynthesis and fruit quality of table grapes,a facility study was conducted on Roselle grapes.Water stress was carried out at germination stage,shoot growth stage,flowering stage,fruit expansion stage,coloring stage and the whole growth stage,and adequate irrigation was used as the control group.The effects of water stress at different growth stages on photosynthetic characteristics,yield and fruit quali-ty of grape were studied.The results show that the net photosynthetic rate of grape leaves is least affected by water stress during shoot growth stage,which decreases by 8.96%compared with the control group.The net photosynthetic rate of grape leaves during fruit expansion stage is most affected by water stress,which decreases by 13.14%compared with the control group.The effect of water stress in germination stage is significant,which can increase the yield by 9.87%.Water stress at coloring stage is beneficial to the accumulation of vitamin C and reducing sugar,decreases the content of titrable acid and improves fruit quality,and has no significant effect on fruit yield.