IMPACT OF IRRIGATION WATER MANAGEMENT AND SPRAYING OF SOME GROWTH REGULATORS ON FULFILMENT OF CHILLING REQUIREMENTS OF OLIVE TREES m

Abstract

The present study was carried out during 2013and 2014 seasons on Picual olives to evaluate the effect of three irrigation water management and four spraying of cytokinin and IAA as alternative treatments for fulfillment of chilling requirements on yield and quality of Picual olives. High shoot length was recorded with T2 of irrigation water management (25, 25 , 25, 25) and spraying IAA at 100 and 200 ppm. Number of leaves / shoot was improved with T2 of irrigation water management and spraying cytokinin at 5 or 10 ppm in November . However , equal frequency of irrigation water at the four physiological stages of olive trees (25, 25 , 25, 25) was effective than the other two water managements in incensing leaf area and spraying 5 ppm of cytokinin .The highest fruit set in Picual olive were obtained with T2 of irrigation water management and spraying 10 ppm of cytokinin Additionally , equal frequency of irrigation water during the fourth stages of picual olive tree was more effective than the other two managements in increasing total and estimated yield . this treatment of irrigation water gives 69.39 and 49.23 Kg / tree and 6.44 and 4.92 ton / fed for both studied seasons . Also, 10 ppm of cytokinin in November was effective in producing high total yield and estimated yield . High values of N % was obatuned with first and third irrigation water managements. Also, an evident increase in N% was obtained with spraying of IAA at 100 without significant differences than control. On contrary , no significant effect to irrigation water management or spraying growth regulators or unteraction between them in affecting P content of Picual olive . However K content 10 ppm cytokinin . From the obtained data , it could be recommended that equal frequency of irrigation water management at the four physiological stages of Picual olive trees and spraying 10 ppm cytokinin in November considered a good irrigation practices for increasing olive yield

Key words: Olives , irrigation water management , growth regulators , fruit set , yield