Effect of bacterial inoculum (Bradyrhizobium spp) and combinations of copper, molybdenum and cobalt on the proportion and concentration of elements in mung seeds (Vigna radiata L.) in two different soils

الملخص

Two field experiments were carried out during two agricultural seasons (the spring season of 2021 at the Agricultural Research Station/College of Agriculture/University of Basra and the second during the fall season of 2021 in Wasit Governorate) to study the effect of bacterial inoculum and adding different amounts of fertilizers for some microelements (copper, molybdenum, and cobalt) in The percentage and concentration of elements in mung (Vigna radiata L.) seeds. Two methods were used in the experiment, adding and not adding bacterial inoculum, and a combination of four fertilization combinations of copper, molybdenum, and cobalt (zero + zero + zero, 100 + 50 + 25, and 200 + 100). +50 and 300+150+75 gm E-1) which are symbolized as F3, F2, F1, F0 respectively. A factorial experiment with a randomized complete block design (R.C.B.D) with three replications was applied. The results showed the superiority of the method of adding bacterial inoculum (R1) in increasing the percentage of nitrogen, phosphorus, potassium, and the concentration of copper, molybdenum, and cobalt in seeds for the two seasons. Likewise, the level of 300+150+75 gm ha-1 (F3) was superior in increasing the percentage of nitrogen, phosphorus, potassium, and the concentration of copper, molybdenum, and cobalt in seeds. Seeds for the two seasons, with an increase rate of 19.83 and 12.75%, 57.89 and 55.44%, 22 and 20.52%, 28.72 and 28.72%, 82.83 and 79.68%, and 51.42 and 48.64%, respectively, for the two seasons. As for the interaction between the two factors, the results showed that the combination R1*F3 was significantly superior in most of the elements studied compared to the combination R0*F0.