Abstract
This study was carried out during 2016 growing season at the lath house of the College of Agriculture, Duhok University, Kurdistan region, to study the effect of foliar application of three concentration of (NH4)2SO4(0, 3 and 6 g.l-1) and three concentration of alga21ST (sea weed extract powder high potassium) (0, 1 and 2g.l-1) a on two cultivars of sweet cherry (Eveyloly and shampion) transplant. The results showed that cultivar eveyloly over dominate on cultivar shampion on this traits shoot numbers, leaf area and chlorophyll content. (NH4)2SO4at6g.l-1 significantly increased leaf area, shoot number andchlorophyll content.Alga21stat 2 g.l-1significantly increased most studied traits. The interactions between cultivar eveyloly and 6g.l-1(NH4)2SO4significantly increased shoot number formed,leaf area, shoot length and chlorophyll content. The dual interaction between cultivar and alga21st significantly increased brunch numbers, leaf area and chlorophyll content and chlorophyll type. And the interactions between (NH4)2SO4and alga21st significantly increased most characteristics. The interactions between cultivar, (NH4)2SO4and alga21st caused positive significant differences in all vegetative characteristics and chlorophyll type
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