Effect Of Bacteria And Yeast Bio Fertilization On Nitrogen Budget, Growth, And Yieid Of Wheat (Triticum Aestivum L.) When Intercropping With Faba Bean (Vicia Faba L.)

The study was conducted in the College of Agricultural Engineering Sciences - University of Baghdad on soil with a mixture of loam during the winter season of the year (2020-2021). The study included a field experiment to evaluate the effect of the prepared nitrogenous bacterial biofertilizer and yeast extract at a concentration of 5 g.L-1 and mineral fertilization on the nitrogen budget in the soil and in the growth parameters of wheat plants and the interaction under the 50% level of the fertilizer recommendation with the use of a recommendation treatment Complete fertilizer 100% For comparison, the amount of water added to each experimental unit was measured after draining 50% of the prepared water using a water meter. A (factorial) experiment was carried out by arranging the split plates (The Split-Plot Design) according to the (RCBD) design. The results of the experiment showed the moral superiority of the intercropping coefficients in Dry weight, the yield of grain weight, and nitrogen concentration in the soil and plants for biological fertilization treatment, where bacterial fertilization and yeast recorded the highest values compared with the mineral fertilization 50 and 100% If it gives an average of (6.667 and 11.533) (Mg.ha-1 ) for dry weight and grain yield, respectively, and 39,730 mg.Kg-1 nitrogen concentration in the soil and 1.367 % nitrogen concentration in the plant compared to the dry weight (4.567 and 4.633) (Mg.ha-1 ), grain yield (10,066 and 8,300) (Mg.ha-1 ), and the nitrogen concentration in the soil (24,400 and 22,200) mg.Kg-1 and nitrogen concentration in the plant (1.237 and 1.043), respectively, for 50 and 100%. The mineral fertilization treatments of 100% also recorded the highest value of ammonia volatilization, amounting to 19,700, followed by 50% treatment at 17.746, and the lowest amount of volatile ammonia was recorded by the bacterial fertilization treatment at 12.976, then the treatment of 12.976 Bacteria with yeast extract 16.980 and yeast treatment 17.960 (kg N ha-1 )for the intercropping treatments. Keywords: Bio fertilization, Yeast extract, Mineral fertilization, Budget nitrogen intercropping It is partially extracted from the Ph.D. thesis of the first researcher.