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| Author: | N. Pickering |
Abstract:
A field trial using three levels of irrigation water salinity (1000, 2500, and 4000 micromhos/cm) and three irrigation frequencies (1.5, 7, and 14 days) was performed for 2 growing seasons in an 8-year-old tropical vineyard of Vitis vinifera L., var.
Ribier.
Irrigation frequencies corresponded to soil moisture tensions of 0.07, 0.14, and 2.1 bars.
Soil and leaf samples were taken periodically during the growing season to evaluate effects upon salinity, pH and chemical constituents.
Midday leaf conductances, pre-dawn and midday water potential and pressure-volume curves were determined biweekly one day prior to the next irrigation.
Yield and vegetative growth were measured at the end of each growth cycle while fruit characteristics were evaluated just before flowering of the next cycle.
Irrigation frequencies for different quality waters are suggested and the use of foliar water stress parameters evaluated.
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