Effect of windbreaks on yield and yield components of Thompson seedless grape vines
Hegazi, E.S.; Yehia, T.A.; El-Hadedy, M.A.; El-Kharbotly, A.A.
Egyptian Journal of Horticulture 28(3): 403-412
IN TWO SUCCESSIVE seasons 1998 and 1999 the effects of two types of windbreaks on yield and yield components of Thompson seedless grape vines compared to that of unprotected vines were verified at distances 10, 30, 60, 90, 120 and 150 m from windbreaks. Yield of vines protected by Casuarina was higher than that of vines sheltered by Eucalyptus that produced higher yield than the control vines, which were grown under open conditions. In 1998, the highest yield in kg/vine was obtained from vines at 90 m from south to Casuarina as it reached 10.48 kg in 1998. In both seasons of the study, average bunch weight was significantly higher in the protected vines compared to that of the unprotected control at distances 30, 60, 90, 120 and 150 m from windbreaks border. The highest record of bunch weight was noticed at 120 m from Casuarina in 1998 as it reached 418.3 g. Similarly, average weight of 100 berries was higher in the protected vines by both types of windbreaks compared to that of vines grown in the open at 30, 60, 90 and 120 m from windbreaks. Generally, yield and yield components were depressed in the vicinity of 10 m from windbreaks, as they were significantly higher in vines grown in the open compared to those of the protected vines. Results of the present study showed that Casuarina is more effective in improving yield and yield components compared to Eucalyptus windbreak.