EFFECT OF SULFUR AND RHIZOBIUM LEGUMINOSARUM ON AVAILABLE OF SOME NUTRIENTS AND THE GROWTH OF BROAD BEAN PLANTS

The experiment was conducted in the fields of the Agricultural Division / University of Kufa during the season 2022-2021 and by designing Randomized Complete Block Design (RCBD) with the aim of studying the use of sulfur to enhance the effectiveness of the bacterial inoculum and to improve the bacterial inoculum of the genus Rhizobium leguminosarum and increase their efficiency in the availability of elements and the growth of broad bean plant (Vicia faba L ), the study included the effect of different levels of sulfur (0,1,2,3,4,5,) g, The results of the study showed that the treatment of using sulfur-enhanced bacterial inoculum increased by 5% in increasing plant height and the number of leaves over the rest of the treatments, where the plant height reached 55.01 (cm) and the number of leaves was 480 (leaf.plant-1). The treatment of adding sulfur 5% was also excelled on the increase in the number of total bacteria on the rest of the treatments in the soil, where the total number of bacteria in the soil reached 104.00 (106 x CFU g. soil-1 dry). While the concentration of available elements N, P and S in the soil reached 44.82%, 51.71%, and 176.19%, respectively. The treatment also exceeded the addition of sulfur 5% in increasing the yield of broad bean plant, as it gave a yield of 7.054 (ton ha-1).