Use of water stress in forcing Kyoho grapevines to produce two crops per year

C. Kamande Ndunu'u, Goro Okamoto, Ken Hirano

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

The use of post-harvest water stress as a management practice in producing two crops of grapes annually was investigated using three-year-old own-rooted Kyoho grapevines. The vines were established under a restricted rooting-zone culture (ca. 30 L/vine). Five weeks after harvesting the first crop, vines were subjected to water stress treatments by completely cutting off irrigation. Control vines received normal watering throughout the year. Though vines in all the treatments produced a second crop, the severe water stress lasting for 16 days was effective in inducing early budbreak, enhancing blooming, and increasing fruitfulness, cluster size, berry set, and berry growth, compared to continuously well-watered vines. The mild water stress of 10 days was less effective. There was an apical dominance tendency in budbreak and a growth potential gradient favoring the upper shoots during the second cycle. Fruits from the two cycles did not differ significantly in their quality. The study shows the potential of water stress as a management practice, especially in increasing the productivity of warm-regions grapevines.

Original languageEnglish
Pages (from-to)157-162
Number of pages6
JournalAmerican Journal of Enology and Viticulture
Volume47
Issue number2
Publication statusPublished - 1996

Fingerprint

Dehydration
vines
water stress
crops
Fruit
Practice Management
budbreak
small fruits
irrigation
Vitis
Growth
apical dominance
rooting
grapes
fruits
shoots

Keywords

  • Bimodal cropping
  • Grapevine
  • Post-harvest water stress

ASJC Scopus subject areas

  • Food Science
  • Horticulture
  • Biotechnology

Cite this

Use of water stress in forcing Kyoho grapevines to produce two crops per year. / Ndunu'u, C. Kamande; Okamoto, Goro; Hirano, Ken.

In: American Journal of Enology and Viticulture, Vol. 47, No. 2, 1996, p. 157-162.

Research output: Contribution to journalArticle

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