ISHS Acta Horticulturae 689: VII International Symposium on Grapevine Physiology and Biotechnology
RELATIONSHIPS AMONG PHYSIOLOGY, GROWTH AND PRODUCTION AS AFFECTED BY WATER REGIME AND VINE SPACING OF ´TEMPRANILLO´ GRAPEVINES |
| Authors: | J. Yuste, J.L. Asenjo, M.V. Alburquerque, J.A. Rubio |
| Keywords: | dry matter, leaf area, photosynthesis, conductance, water potential, yield |
| Abstract:
Vineyard irrigation in high wine quality areas is controversial. A study was conducted in the province of Valladolid, Spain to determine the effects of irrigation amount and vine density on physiology, growth and production of ‘Tempranillo’ grapevines. The irrigation treatments were 20 and 40% of ETo and a non-irrigated control. Row and vine spacings were 2.20 and 1.15 m (2645 vines ha-1) and 2.70 and 1.40 m (3953 vines ha-1), respectively, for the two density treatments. Water status clearly affected leaf gas exchange as both photosynthesis (A) and stomatal conductance decreased as leaf water potential (LWP) decreased. Leaf A and gs were similar between the two irrigated treatments season long and they were greater compared to the control. The differences found in dry matter production, leaf area and yield due to the irrigation and vine density treatments were not related to A, LWP and gs observed at the single leaf level. | |
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