EFFECT OF CHARCOAL, ZEOLITE AND RHIZOBIUM LEGUMINOSARUM ON THE AVAILABILITY OF SOME NUTRIENTS AND THE GROWTH OF BROAD BEAN PLANTS”

An experiment was conducted in the fields of the Agricultural Division - University of Kufa during the season 2022-2021 and by designing Randomized Complete Block Designs with the aim of studying the use of charcoal and zeolite to enhance the effectiveness of the bacterial inoculant and to improve the bacterial inoculation of the genus Rhizobium leguminosarum and increase their efficiency in the readiness of the elements and the growth of the Vicia Faba L plant,The study included the effect of different levels of charcoal and zeolite (200 gm peat moss, 10 gm zeolite, 20 gm zeolite, 30 gm zeolite, 10 gm charcoal, 20 gm charcoal, 30 gm charcoal, 5 gm charcoal +5 g zeolite, 10 gm charcoal + 10 gm zeolite, 15 gm charcoal + gm). 15 zeolite) g.The results of the study showed that the use of bacterial inoculant enhanced with charcoal and zeolite led to a significant increase in leaf area and number of leaves. The level of adding 30 gm of charcoal and 30 gm of zeolite to the bacterial inoculant achieved the highest rate (30.70 cm2 plant1-,30.89 cm2 plant-1,193.6 leaf.plant-1,196.7 leaf.plant-1).While the availability of nitrogen and phosphorous elements reached the level of 30 gm of charcoal and 30 gm of zeolite for bacterial inoculant, the highest average was 22.43 mg N kg-1 for both, 3.78 mg N kg-1, 3.92 mg N kg-1. Also, treatments of 30 gm of charcoal and 30g of zeolite were excelled in increasing the yield of plant, as it reached 7.565 tons ha-1,8.191 tons ha-1, respectively.