THE EFFECT OF ORGANIC AND BIO FERTILIZATION AND SPRAYING WITH SOME NANO ELEMENT ON THE YIELD TRAITS AND COMPONENTS OF THE FENUGREEK PLANT (TRIGONELLA FOENUM-GRAECUM L.)

A field study was conducted at the research station of the Department of Field Crops belonging to the College of Agriculture - Tikrit University, during the two winter seasons of the years (2018-2019) and (2019-2020), using the randomized complete block design (RCBD) according to a factorial experiment system within the split plots (Factorial in split-plots), and in three replicates. The main plot included the spraying levels with nano-elements (whitout adding, Nano iron 160 mg.L-1, Nano cobalt 3 mg.L-1, Nano iron 160 mg.L-1 + Nano cobalt 3 mg.L-1), As for the sub-plots, the resulting combinations were distributed between the levels of bacterial inoculation of Sinorhizobium meliloti seeds (inoculation , without inoculation ) and organic fertilization with sheep manure (0, 2, 4, 6) tons.dunum-1. The second season, and its interaction with the study’s factors and combinations, also excelled significantly in their impact by giving it the highest averages in the yield and its components compared to the first season. As for the interaction between the factors of the study, the triple combination between (iron 160 mg.L-1 + cobalt 3 mg.L-1), bacterial inoculum and organic fertilization at an average of (6) tons. dunum-1 recorded a highly significantly excelled in the traits of the yield and its components. Through the results that have been reached, we find that the foliar spraying with the chelated nano-elements of iron and cobalt together and the inoculation of seeds with rhizobia with the addition of decomposed organic sheep manure can create a kind of natural balance in the nutritional status of the fenugreek plant, which positively affects the improvement of the quantity and quality of the yield and its components for the plant.