Effect of Biohealth Biostimulant and Dry Yeast Suspension on Growth and Yield of Two Varieties of Kohlrabi Brassica oleracea var Gongylodes

Abstract

This study was conducted in the field of the Department of Horticulture and Landscaping / College of Agriculture / University of Karbala for the season 2021-2022 in order to know the effect of adding the Biohealth stimulator and spraying dry bread yeast suspension on the growth and yield of two cultivars of Brassica oleracea var gongylodes, where the experiment included two factors:The first factor includes eight fertilizer combinations without adding (T1), adding Biohealth (T2), spraying the yeast suspension at a concentration of 2 gm L-1 (T3), spraying the yeast suspension at a concentration of 4 gm L-1 (T4), spraying the yeast suspension at a concentration of 6 gmL -1 (T5), add Biohealth + spray yeast suspension at a concentration of 2 gm L-1 (T6), add Biohealth + spray yeast suspension at a concentration of 4 gm L-1 (T7), add Biohealth + spray yeast suspension at a concentration of 6 gm L-1 (T8) ,The second factor is two varieties of words: (White Vienna and Purple delicacy), The most important results of the study can be summarized as follows:Treatment T8 outperformed on the other treatments in the average plant height and gave 27.27 cm and in the average number of leaves gave 18.15 leaves of a plant -1, It also gave the highest average leaf area and amounted to 31,268 cm2 and in the percentage of dry matter in the leaves and gave 15.63% and the average weight of the pivot stem, which amounted to 279.2 g.The Purple delicacy was superior to the White Vienna cultivar in plant height 27.38 cm, number of leaves 19.24, leaf area 27,515 cm2, dry matter percentage 15.82%, and stem weight 234.8 g.