The experimental research on suitable irrigation schedule for grape leaves with the drip irrigation technique at the water scarce region

Abstract

     The experimental research on drip irrigation schedule (with extra micro-sprinkle system for microclimate improvement) for Grape leaves in three crop seasons with two-day, three-day and four-day irrigation frequencies at the water scarce region, Binh Thuan province. Observed daily meteorological factors for calculating the experimental crop water requierment by the Penman method. Comparing with traditional irrigation technique, water amount of water saving irrigation one of two-day frequency was only from 48.70 to 88.40%, three-day frequency from 47.58 to 87.81% and four-day frequency from 40.25 to 75.31%. On the same irrigation schedule, leaf weight of the blocks with extra micro-sprinkle system was higher than that one in the remaining blocks, the water use efficiency of blocks with less water level was the highest, the next ones were the blocks with initial and high water levels. The suitable drip irrigation schedule for Grape leaves has been established with two-day irrigation frequency and the less water level by growing stages, it would contribute to effectively applying in agricultural prodution practice at the water scarce region.