Fruitfulness in grape-vines: Effects of water stress
DOI:
https://doi.org/10.5073/vitis.1973.12.299-305Abstract
Plants of Vitis vinifera L. cv. Cabernet Sauvignon were grown in undrained containers in a glasshouse and watering was controlled by weighing. There were three treatments with water contents of the growing medium falling either to 60% (A), 40% (B) or 20% (C) of field capacity before re-watering. As water stress increased the amount of water used decreased as clid extension growth of shoots. At harvest 13 weeks after bud burst the weight of C plants was less than two thirds that of A plants. Fruitfulness (number and weight of bunch primordia per bud) was progressively depressed with increase in water stress. Number and weight of leaf primordia in buds were unaffected.
Die Fruchtbarkeit der Rebe: Auswirkungen von Wassermangel
Reben der Sorte Cabernet Sauvignon (Vitis vinifera L.) wurden in nicht dränierten Gefäßen im Gewächshaus herangezogen; die Wasserversorgung wurde durch Wägen kontrolliert. Bei den drei Varianten wurde die Pflanzerde bei Erreichen eines Wassergehaltes von 60 °/o (A), 40°/o (B), oder 20°/o (C) der Feldkapazität wieder gegossen. Mit zunehmendem Wassermangel nahm die Menge des benötigten Wassers ab, entsprechend der wachstumsbedingten Ausdehnung der Triebe. Bei der Ernte 13 Wochen nach dem Austrieb betrug das Gewicht der C-Pflanzen weniger als zwei Drittel der A-Pflanzen. Die Fruchtbarkeit (Anzahl und Gewicht der Infloreszenzprimordien) war mit zunehmendem Wassermangel progressiv vermindert. Anzahl und Gewicht der Blattprimordien blieben unverändert.
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