Magnitude Yield Response And Economic Value
Of Selected Wheat Genotypes Related To
Irrigation Schedules Under The Arid Ecosystem
Of Saudi Arabia
Author(s)
A. A. Alderfasi & A. A. AL-Owayed
Abstract
The greatest challenges facing the improvement of agriculture programs under
arid and semiarid environment are those involving the provision of water. Thus,
field experiments have been carried out in a split–plot design at the Agricultural
Research Station, Faculty of Food and Agricultural Sciences, King Saud
University. The experiments included 20 treatments, four wheat genotypes,
(Yecora Rojo, West bread, KSU 102 and KSU 105) and five irrigation schedules
(50, 100, 150, 200 mm) of cumulative pan evaporation CPE, as compared to
traditional irrigation methods used by many farmers (weekly irrigation). The
total amount of water supplied over the growing season was calculated. The data
obtained clearly indicated that a gradual decrease in most of the yield and yield
component characters were in line with decreasing irrigation schedules. The
results also showed that no significant differences were found between irrigation
schedules at 50 mm of CPE and weekly irrigation in most of the studied
characters, except on biological yield, which was similar to traditional irrigation.
In addition, significant differences among wheat genotypes were observed in all
traits. The KSU 105 genotype ranked in the first position and surpassed the other
tested genotypes. The interaction between irrigation schedules and genotypes
was also significant for grain yield. Economic evaluation showed that the highest
invested return per SR and net return in SR was obtained by irrigating wheat at
Keywords
wheat genotypes, arid environment, drought resistance, irrigation schedules, CPE, economic value
Related Book
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