Effect of Biohealth Biostimulant and Dry Yeast Suspension on some Chemical Characteristics of Leaves and the Total Yield of Two Varieties of Kohlrabi Brassica oleracea var Gongylodes

Abstract

The purpose of this experiment was to determine the impact that applying the biostimulant Boiohealth and spraying dry bread yeast suspension would have on the chemical components of the leaves and the total yield of two different varieties of kohlrabi during the autumn of 2021-2022 at the University of Karbala’s College of Agriculture. The experiment included two factors, The first factor includes eight fertilizer combinations, its without addition (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 gm L-1 (T5), add Biohealth + spray yeast suspension at a concentration of 2 g L-1 (T6), add Biohealth + spray yeast suspension at a concentration of 4 g L-1 (T7), add Biohealth + spray yeast suspension at a concentration of 6 g L-1 (T8) The second factor is two varieties of words: White Vienna and Purple delicacy. Treatment T8 outperformed the rest of the treatments, as it gave the highest percentage of chlorophyll, which amounted to 7.709%, the highest percentage of nitrogen, which amounted to 3.170%, the highest percentage of phosphorous, which amounted to 0.3659%, the highest percentage of potassium, which amounted to 1.351%, and the highest total yield of 27.00 tons ha-1. The results show the superiority of the White Vienna variety over the Purple delicacy in the percentage of chlorophyll and the percentage of phosphorous, which amounted to 7.079% and 0.3503%, respectively, while the Purple delicacy was superior to the percentage of nitrogen, which amounted to 2.864%, the percentage of potassium, which amounted to 1.305%, and the total yield of 22.76 Ton hectare -1.