Riffle Vegas, Palmer Nathaniel, Casassa L Federico, Dodson Peterson Jean Catherine
Wine and Viticulture Department, California Polytechnic State University, San Luis Obispo, CA 93407, USA.
Plants (Basel). 2021 Feb 5;10(2):311. doi: 10.3390/plants10020311.
Unlike most crop industries, there is a strongly held belief within the wine industry that increased vine age correlates with quality. Considering this perception could be explained by vine physiological differences, the purpose of this study was to evaluate the effect of vine age on phenology and gas exchange parameters. An interplanted, dry farmed, Zinfandel vineyard block under consistent management practices in the Central Coast of California was evaluated over two consecutive growing seasons. Treatments included Young vines (5 to 12 years old), Control (representative proportion of young to old vines in the block), and Old vines (40 to 60 years old). Phenology, leaf water potential, and gas exchange parameters were tracked. Results indicated a difference in phenological progression after berry set between Young and Old vines. Young vines progressed more slowly during berry formation and more rapidly during berry ripening, resulting in Young vines being harvested before Old vines due to variation in the timing of sugar accumulation. No differences in leaf water potential were found. Young vines had higher mid-day stomatal conductance and tended to have higher mid-day photosynthetic rates. The results of this study suggest vine age is a factor in phenological timing and growing season length.
与大多数农作物行业不同，葡萄酒行业中有一种根深蒂固的观念，即葡萄树树龄的增加与品质相关。考虑到这种认知可能是由葡萄树生理差异所解释的，本研究的目的是评估树龄对物候和气体交换参数的影响。在加利福尼亚州中部海岸一个采用一致管理措施的间作、旱作仙粉黛葡萄园地块，连续两个生长季节进行了评估。处理包括幼龄葡萄树（5至12年树龄）、对照（该地块幼龄与老龄葡萄树的代表性比例）和老龄葡萄树（40至60年树龄）。对物候、叶片水势和气体交换参数进行了跟踪。结果表明，幼龄和老龄葡萄树在坐果后果候进程存在差异。幼龄葡萄树在浆果形成期间进展较慢，在浆果成熟期间进展较快，由于糖分积累时间的差异，导致幼龄葡萄树比老龄葡萄树更早收获。未发现叶片水势有差异。幼龄葡萄树中午气孔导度较高，中午光合速率往往也较高。本研究结果表明，树龄是物候时间和生长季节长度的一个因素。
