Effect of adding biofertilizer and Metribuzin on the quality traits of potatoes exposed to abiotic stress conditions

Abstract

A field experiment was conducted in Al-Mashroo / Al-Hamzawi area of Al-Musayyib district (35 km north of Babylon province) within longitude (44) and latitude (32). The cultivation took place in two seasons: the spring season on 18/1/2022 and the autumn season on 9/15/2022. For the purpose of finding out the effect of adding biofertilizer and Metribuzin on the quality traits under the influence of different irrigation periods on the growth and yield of potato Niemae using a split-split plot design within  Randomized Complete Block Design( RCBD) with three replicates, with 108 experimental units. The following traits were measured: the percentage of dry matter in the tubers (%), the percentage of starch in the tubers (%), the percentage of nitrogen in the tubers (%), and the percentage of phosphorus in the tubers (%). The results of the statistical analysis showed that the pre-emergence and post-emergence treatments were significantly excelled in the percentage of dry matter, the percentage of starch and the percentage of nitrogen. 47.18%, 36.08%, 38.02%, 1.524, 1.934%, 0.431, and 0.448%) for both season, respectively. Irrigation treatment every 7 days was significantly exelled in dry matter, starch and phosphorous percentage (45.59, 47.62%, 36.09 and 38.41%, 0.443 and 0.462%) for both season, respectively. The bi- interaction between irrigation and herbicide periods was significant in qualitative traits indicators, exceeding the interaction of 7 days × each of pre and post, and the percentage of phosphorus was (0.484, 0.481%, 0.504, and 0.503%) for the both seasons, respectively. The interaction between irrigation and biofertilization periods had a significant effect, and the interaction of 7 days × Myco was excelled in the percentage of phosphorus (0.499 and 0.519%) for both season, respectively. The interaction between the herbicide and biofertilizer had a significant effect, and the interaction of post × Myco was excelled in dry matter and percentage of nitrogen amounted to (49.40 and 52.18%, 1.699 and 2.368%) for both seasons, respectively. The effect of the triple interaction between the three factors was significant, and the interaction of 7 days × post × Myco was excelled in the percentage of phosphorus (0.563 and 0.590%) for both season, respectively.