Effects of Vine Water Status on Yield Components, Vegetative Response and Must and Wine Composition

P. Baeza, P. Junquera, Emilio Peiro, J. Lissarrague, D. Uriarte, M. Vilanova
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引用次数: 14

Abstract

Despite Vitis vinifera L. is a drought-tolerant species—rainfed traditionally grown in a very diversity of climates—irrigation has more and more become a usual practice aimed to obtain regular yields along seasons and to control must composition. Results on vineyard irrigation are dependent on the timing, length and intensity of the water deficit. From budbreak to flowering, shoot growth is very sensitive to water stress, while reproductive growth is almost unaffected. Severe water deficit during fruit set can reduce yield by affecting ovary cell multiplication and expansion. During maturation water stress induces yield reduction by limiting berry growth; along this phase must composition is also affected. There is a positive, linear relationship between must sugar content and available water; however, no relationship has been found to either total acidity or pH. Biosynthesis of anthocyanins and fruity aromas is enhanced by water deficit. Usually, wines from moderate irrigation treatments scored the highest. There is a general agreement that severe, long water deficits diminish must quality, leaf area, fertility and yield, and it has a negative carryover effect on the next seasons by limiting wood reserves to be used the following seasons.
葡萄水分状况对产量组成、营养反应和酒、酒成分的影响
尽管葡萄是一种耐旱品种——传统上是在多种气候条件下生长的雨养品种——灌溉越来越成为一种常规做法,目的是在不同季节获得稳定的产量,并控制其成分。葡萄园灌溉的效果取决于水分亏缺的时间、长度和强度。从萌芽到开花,芽部生长对水分胁迫非常敏感,而生殖生长几乎不受影响。坐果期严重缺水会影响子房细胞的增殖和膨胀,从而降低产量。成熟期水分胁迫通过限制浆果生长导致产量降低;沿着这一阶段,必须的成分也受到影响。必须糖含量与有效水分呈线性正相关;然而,没有发现总酸度或ph的关系。花青素的生物合成和水果香气是由水分不足增强。通常,适度灌溉的葡萄酒得分最高。人们普遍认为,长期严重缺水会降低质量、叶面积、肥力和产量,并通过限制下一季节使用的木材储备,对下一季节产生负面的延续效应。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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