光照强度和温度对设拉子葡萄果实生长和糖积累的影响

D. Greer, S. Rogiers, Subhashini Abeysinghe Mudiyanselage
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引用次数: 21

摘要

温度和光照是影响葡萄生长季节生理的关键气候因子。我们的目的是研究温度和光照强度对设拉子葡萄在葡萄园条件下的生殖生长反应的相互作用。在连续三个季节里,在一个葡萄园里,对浇水充足的葡萄藤进行无遮荫覆盖,有轻度、中度和重度遮荫覆盖。其中两个季节发生了几次高温事件,即连续几天气温超过40°C。与开放的冠层相比,较冷季节的冠层温度降低3.2-6°C,较暖季节的冠层温度降低4-6°C。较重的遮荫延迟了果实的生长,但不影响果实的糖积累速率。在高温最严重的季节,遮荫处理的果实干物质积累量显著高于未遮荫处理。这一假设得到了证实,即中等和较重的阴影对浆果的成熟过程提供了高水平的保护,使其免受夏季高温和同时暴露在光强下的影响。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
The effect of light intensity and temperature on berry growth and sugar accumulation in Vitis Vinifera "Shiraz" under vineyard conditions
Temperature and light are key climatic factors which affect grapevine physiology in the growing season. Our aim was to investigate the interactive effects of temperature and light intensity on reproductive growth responses of 'Shiraz' vines in vineyard conditions. Well-watered vines were covered with no shade, light, medium and heavy shade covers in a vineyard over three consecutive seasons. Several heat events, i.e., air temperatures exceeding 40 °C for several days, occurred in two of the seasons. Heavy shade reduced canopy temperatures by 3.2-6 °C in the cooler season and by 4-6 °C in the warmer seasons, relative to air temperature and compared with the open canopy. The onset of berry growth was delayed by the heavy shade but the rate of sugar accumulation was not affected. During the season with the most severe heat events, berry dry matter accumulation was significantly higher in the shaded treatments compared to the unshaded vines. The hypothesis was confirmed that medium and heavy shade conferred high levels of protection on the berry ripening process from high summer temperatures and the concurrent exposure to light intensities.
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