RT Journal Article SR Electronic T1 Effects of Restricted Rooting Volume on Vine Growth and Berry Development of Kyoho Grapevines JF American Journal of Enology and Viticulture JO Am J Enol Vitic. FD American Society for Enology and Viticulture SP 248 OP 253 DO 10.5344/ajev.2001.52.3.248 VO 52 IS 3 A1 Shiping Wang A1 Goro Okamoto A1 Ken Hirano A1 Jiang Lu A1 Caixi Zhang YR 2001 UL http://www.ajevonline.org/content/52/3/248.abstract AB Effects of restricted rooting volume on vine growth and berry development were evaluated on Kyoho grapevines. The grapevines were planted in three buried beds with volumes of 0.05 m3, 0.1 m3, 0.15 m3 and in the field (unrestricted). Vines grown under restricted rooting volume had thinner and longer primary roots and more secondary and lateral roots. Smaller rooting volume tended to result in a more rapid reduction of soil moisture and led to a smaller trunk, shorter shoot, smaller leaf area, and lower photosynthetic rate. As a result, berry set was up 15 to 20% and almost all berries were seeded. For vines grown in the field, berry set was less than 10% and half were seedless fruitlets. Vines grown under restriction of rooting zone also showed improvement in accumulation of skin color and juice total soluble solids. Favorable vine growth and berry characteristics were achieved when rooting-zone depth was 20 cm and rooting-zone volume was adjusted to about 0.025 m3 per square meter of leaf area in buried bed.Acknowledgment: This work was conducted in the Graduate School of Natural Science and Technology, Okayama University.