Effects Of Deficit Irrigation On Yield And Water
Use Of Grown Cucumbers In Saudi Arabia
Author(s)
A. M. Alomran & I. I. Luki
Abstract
Deficit irrigation can play an important role in increasing water use efficiency
(WUE) and reduced amount of irrigation. Deficit irrigation generally refers to
fully irrigated crops where water is reduced or withheld during certain growth
stages. In this study, a series of greenhouse and open field experiments were
conducted using a deficit irrigation program on cucumber crops under drip
irrigation during 2007–2010 growing seasons. The layout of the experiment was
a completely randomized design with four replicates. Irrigation treatments
consisted of five levels of ETc (30, 40, 60, 80, and 100% of ETc) in addition to
traditional practice by farmers. At 60 and 80% treatments, deficit irrigation
tested at different growth stages (development, med, and late stages of the
growth) for a total of 14 treatments at each experiment. The maximum amount of
water applied to the crop was 332 mm for the 100%ETc treatment while the
minimum water applied was 100 mm for 30%Etc treatment, and 600 mm for
traditional practice by the farmers in the region. The calculated ETc ranged from
between 95 and 316 mm for the different treatments. The objective of the study
was to determine the crop water requirements in both the open field and
greenhouse and calculate crop response factor (ky) and WUE of cucumber crop
using a deficit irrigation program at different stages of growth. Results indicated
that a cucumber could stand the shortage of water during the growth and crop
response (Ky) values ranging between 0.7 and 0.98. However, the amount of
water used was much lower than that of the traditional method used by farmers
in the region. Water use efficiency (WUE) and water productivity (WP) values
increased when water amounts decreased with the exception of the traditional
irrigation; these values decreased to 45.6 and 24 kg/m3, respectively. The highest
values at much stressed treatment 30% ETc.
Keywords: deficit irrigation, crop response factor, water use efficiency, drip
irrigation, crop water requirement.
Keywords
deficit irrigation, crop response factor, water use efficiency, drip
irrigation, crop water requirement.
Related Book
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