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首页> 外文会议>International Horticultural Congress on Science and Horticulture for People >Early Defoliation of 'Tempranillo' Grapevines in Semi-Arid Terroirs of Spain
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Early Defoliation of 'Tempranillo' Grapevines in Semi-Arid Terroirs of Spain

机译：西班牙半干旱传输中“Tempranillo”葡萄园的早期落叶

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Early defoliation has been found to be an effective tool to reduce cluster compactness and improve fruit composition in different areas of northern Italy. Our objective was to test this technique under warmer conditions in 'Tempranillo' vines in two locations of Spain. In Requena (East-Spain), non-defoliated vines were compared with three defoliation treatments performed at different phenological phases (flowering or fruit set) and intensities. Sixteen vines per treatment were randomly selected in the vineyard. In the Badajoz (West-Spain) site, where vines are more vigorous, control vines were compared with defoliation carried out at fruit set. Treatments were carried out in 108 plants per replicate and four replicates per treatment. In the first season, as an average for all defoliation treatments, yield was reduced 22% by leaf pulling in East-Spain but not in West-Spain where yield was similar in all treatments. In East-Spain the yield reduction was due to lower berry fresh weight, while fruit set was not affected by defoliation. The effects of leaf pulling on grape acidity were different in the two locations, with defoliation decreasing must pH in West-Spain but with an increasing trend in East-Spain. Berry phenolic concentration increased with leaf removal in East-Spain but not in West-Spain where however cluster health was improved by defoliation. In East-Spain, the experiment was repeated during a second season, and in that year there was a heavier reduction in yield (-41%) due to lower bud fertility and fruit set produced by leaf pulling, suggesting important carry-over effects of the treatments. Overall, results indicate that even in warm terroirs early defoliation can improve berry composition but in different fashion depending on specific site characteristics. Growers should take into account that an important yield penalty due to defoliation might occur.
机译：已发现早期落叶是一种有效的工具，可以减少群体紧凑性，并改善意大利北部不同地区的果实组成。我们的目标是在西班牙两个地点的“Tempranillo”葡萄藤下的温暖条件下测试这种技术。在Requena（East-Spain）中，将非落叶藤蔓与在不同鉴别阶段（开花或水果套装）和强度下进行的三种落叶治疗进行了比较。在葡萄园中随机选择每次治疗的十六次葡萄藤。在Badajoz（西西班牙）网站上，葡萄藤更加活跃，与水果套装进行的落叶进行了控制藤蔓。在每次重复的108株植物中进行治疗，每次治疗四次重复。在第一季，随着所有落叶治疗的平均值，叶片拉动在东西班牙的叶片减少了22％，但在西西班牙，在所有治疗中的产量相似。在东西班牙，减少产量是由于浆果较高的重量较低，而水果套不会受到脱液的影响。两个地点的叶片拉动对葡萄酸度的影响是不同的，脱透断率下降在西部 - 西班牙的pH值，但在东西班牙的趋势越来越大。莓果酚醛浓度随着东西班牙的叶片去除而增加，但在西部西班牙，然而，通过脱液，改善了群集健康。在东西班牙，在第二季重复该实验，并且在该年份，由于叶拉拉的芽生育力和水果套件，产量（-41％）较重减少，这表明重要的随身携带效果治疗。总体而言，结果表明即使在温暖的陶土中，早期落叶也可以改善浆果组合物，而是根据特定的位点特征来改善不同的方式。种植者应考虑到可能发生诽谤导致的重要收益罚款。

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