Effect of Biofertilizer and Metribuzin on the Yield Traits of Potato under the Influence of Water Stress

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A field experiment was conducted in Al-Mashroo area / Al-Hamzawi, affiliated to Al-Musayyib district, 35 km north of Babylon, to determine how bio-fertilizer and herbicide spraying affected potato yield and quality under different irrigation periods. The RCBD (Randomized Complete Block Design) split-split plot design was used to conduct the experiment with three replications. The experiment had three factors: irrigation periods (5, 7, and 9) days for the main plots. The second element, biofertilizer, has three levels (control treatment without CO, rhizobia R, mycorrhizal M) and sub-plots. The third component, metribuzin, has four stages (no CO, preemergence, postemergence, late postemergence) and sub-sub plots. The statistical investigation indicated that it excelled the following traits: number of marketable tubers plant-1, weight of marketable tubers (g), total yield of one plant (g. plant-1), marketing yield (ton.ha-1). The number of tubers, marketing yield, and plant yield substantially impacted pre-emergence and post-emergence treatments. The (Myco) fertilizer treatment performed better in tuber quantity, weight, and marketing yield (3.26 and 3.77 tuber plant-1, 106.5 and 107.67 g, 23.17 and 24.78 tons ha-1) for both seasons. Irrigation every 7 days increased tuber quantity, weight, yield per plant, and marketing yield (3.37 and 3.89 tubers). 384.3 and 462.3 gm, Plant-1, 112.2 and 115.53 g Plant-1 (20.85 and 22.08 tons ha-1) both seasons. The bilateral interaction between irrigation periods and herbicide was significant in tuber number and marketing yield (3.66 and 3.94 tubers.plant-1, 4.28 and 4.52 tubers.plant-1, 25.57 and 22.83 tons ha-1 and 27.11 and 24.34 tons ha-1) for both seasons. The interaction between irrigation times and biofertilizer was more significant than the 7-day interaction. For both seasons, Mycox produced 4.01 and 4.64 tubers plant-1, 113.6 and 119.70 gram, 25.52 and 27.18 tons ha-1, and marketing yield. The herbicide-bio-fertilizer interaction significantly impacted tuber production, with post-Myco interaction leading to 3.89 and 4.41 tubers per plant-1 in both seasons. The triple interaction was substantial, with 7 days post-Myco resulting in a higher number of tubers (5.32 tubers plant-1) in both seasons.