PREPARING AND SELECTION MICROBIAL CRRIER FOR BACILLUS MEGATERIUM AND AZOSPIRILLUM LIPOFERUM AND ITS IMPACT ON GROWTH AND YIELD OF POTATO
A. Abed, I. | M. Al-joboory, W. | T. Yaqub, M. | A. Hassan, M.
A factorial experiment was conducted at the Research Station of the College of Agriculture, Anbar University, using the RCBD factorial experiments to determine the effect of the type of carrier and bacterial inoculum on the growth and yield of potatoes. Three carrier materials were used: pre-ripened date seeds, molasses, and zeolite as a control. B. megaterium and A. lipoferum carriers and inoculum were prepared and incubated for five days. The treatments were distributed randomly, adding the full fertilizer recommendation to the field, except P and N, which were added at a rate of 60% of the recommendation. The results showed that the carrier made from pre-ripe date seeds was superior to the zeolite, as the highest plant height and potato yield were recorded at 73.22 cm and 42.95 tons ha-1, with a significant difference from the lowest rate recorded for zeolite, 67.17 cm and 38.18 tons ha-1, respectively. Dpbm and molasses carriers recorded the highest percentages of N and P in soil, reaching 47.0, 45.98, 11.77, and 11.18 mg kg-1 soil, respectively. B. megaterium recorded the highest yields of potato and phosphorus in the soil, reaching 44 ton ha-1 and 9.86 mg Pkg-1. The interaction DpbB-B. megaterium recorded the highest average soil microbial content at 8.65 log cfu g-1. The molasses-A followed the lipoferum interaction with an average microbial content of 6.831 and 6.35.65 log cfu g-1.
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