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首页> 外文期刊>Acta Horticulturae >Impact of various leaf area modifications on berry maturation in Vitis vinifera L. 'Riesling'.
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Impact of various leaf area modifications on berry maturation in Vitis vinifera L. 'Riesling'.

机译：葡萄叶中各种叶面积修饰对浆果成熟的影响。

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摘要

The ratio of Leaf Area to Fruit Weight was investigated into its effects on 'Riesling', and whether changing the ratio could delay its maturation. Leaf Area was reduced using various manual as well as machine defoliation treatments post-flowering, differing in their position of leaf removal and their intensity. Also, application of anti-transpirant agent testing for its impact on the transpiration to the vine's canopy was trialled. Large reductions in the ratio of Leaf Area to Fruit Weight significantly reduced the sugar content of 'Riesling' berries at harvest. The specific impacts were dependent on the timing of carbohydrate limitation, the position of defoliation, and its level. Defoliation by machine (MDC: mechanically defoliated canopy) revealed decreases in the rate of maturity however was not as effective in delaying the maturation period as the manual methods SSP (severe summer pruning) and BZD (bunch zone defoliation). Compared to control (1.96 m2 kg-1) the Leaf Area to Fruit Weight ratios were reduced to sizes of 0.39, 1.03, 1.23 and 1.42 m2 kg-1 for SSP, BZD, MDC and Nu-Film-PReg. respectively. Proportion of leaves from lateral shoots to those from main shoots was increased most in MDC, and its impacts on grape composition and rate of maturation varied from a similar treatment SSP. Maturity sampling revealed the impacts of each treatment on the maturing berries. For SSP veraison was delayed by approximately two weeks, and all other treatments revealed reductions in must sugar content at harvest. Berry size was not significantly reduced. Developing a better understanding of canopy characteristics will allow refinements of future vineyard management strategies to adapt better to seasonal changes.
机译：研究了叶面积与果实重量的比率对“雷司令”的影响，以及改变该比率是否会延迟其成熟。开花后使用各种手动和机器脱叶处理减少了叶面积，这是因为它们的除叶位置和强度不同。此外，还尝试了使用抗透明剂测试其对葡萄树冠蒸腾作用的影响。叶面积与果实重量之比的大幅降低显着降低了收获时“雷司令”浆果的糖含量。具体影响取决于碳水化合物限制的时间，落叶的位置及其水平。机器脱叶（MDC：机械脱叶冠层）显示出成熟速率的降低，但是在延迟成熟期方面不如手动方法SSP（严重夏季修剪）和BZD（束缚区脱叶）有效。与对照（1.96 m 2 kg -1 ）相比，叶面积与果实重量的比值减小到0.39、1.03、1.23和1.42 m 2 < / sup> kg -1 用于SSP，BZD，MDC和Nu-Film-PReg。分别。在MDC中，侧枝至主枝叶片的比例增加最多，其对葡萄组成和成熟速率的影响与类似的SSP处理不同。成熟度采样显示了每种处理对成熟浆果的影响。对于SSP，检验延迟了大约两周，所有其他处理均表明收获时必需糖含量降低。浆果的大小没有明显减少。更好地了解冠层特性将有助于完善未来的葡萄园管理策略，以更好地适应季节变化。

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