تأثير سطوح مختلف آبياري بر عملكرد، كيفيت و بهره وري مصرف آب سه رقم انگور

Effect of different levels of irrigation and quantitative traits on three grape cultivar

Effects of different levels of irrigation on qualitative and quantitative traits of some commerecial grape cultivars were investigated in west Azarbaijan province. The research was carried out using strip-block design on the base of RCBD with six cultivares (ʹKeshmeshe Sefidʹ, ʹKeshmeshe Qermezʹ, ʹRishbaba Qermezʹ, ʹSiyah Sardashtʹ, ʹHossainiʹ and ʹGhezel Ouzumʹ) and three levels of irrigation treatments (100%, 75% and 50% water requirment) in 3 replications. The irrigation treatments were done from the forth year and then in the years of 2004-2005 at fruit ripenning stage, different traits as weight, length and width of bunch and the qualitative traits including TSS, TA, pH and the voulume of the juice were recorded. Results of pooled analysis indicated that the different levels of irrigation had significant effect on juice volume, berry weight, bunch length, width, weight, annual vegetetive growth and yield. The most and the least yield were obtained by 100% and 50% irrigation, respectivly but the effects of 75% irrigation on yield was not significant. Defficit irrigation reduced the juice voulume, length and width of berry and berry size. Water consumption in 100, 75 and 50% of water requirment supply treatments were 4086, 3064 and 2043 m3 per hectare. To increase the water productivity in west Azarbaijan vineyards, applying of 25% deficiet irrigation is recommended. By decreseing the 25% water use the water productivity will increase to 30.7% without significant reduction in yieald.