Effect of Adding Organic Fertilizer (Humus) Perl Humus on some Vegetative Growth Characteristics of Grape Cultivars Shatur Al-anz and Olivette Noire (Vitis Vinifera L.)

Abstract

Abstract This study examined the effects of organic fertilizer PERL HUMUS on the vegetative growth traits of young Shatur Al-anz and Olivette noire grape vines in the grape orchard of the Department of Horticulture and Gardens Engineering, College of Agriculture, Tikrit University, during the growing season (2022). The experiment used a split-plot design according to the Randomized Complete Block Design (RCBD) with two factors: the first factor was the addition of the organic fertilizer PERL HUMUS to the soil at three levels (H0= 0, H1= 150, and H2= 300 gm per seedling) twice before the vegetative buds opened and two months after the first addition. Shatur Al-anz (V1) and Olivette noire (V2) grape varieties are the second factors. Organic fertilizer had a significant effect on most vegetative growth traits, especially the H2 treatment, which had the highest values for main branch length and diameter, wet weight, dry weight, and leaf area (134.04 cm, 12.74 mm, 19.65 gm, 11.02 gm, and 5.24 m2 per vine). There was no notable rise in primary branches. The Shatur Al-anz variety significantly outperformed the Olive variety in (the number of main branches) and (wet weight and dry weight).