Effect of Azospirillum brasilense Addition and Organic Matter on Irrigation Efficiency, NPK Availability and Wheat Yield (Triticum aestivum L.)

Abstract

For the purpose of studying the effect of adding bio-bacterial fertilizer and levels of organic matter on irrigation efficiency and the available of some nutrients and on the yield of wheat plant (Triticum aestivum L.), a field experiment was carried out during the agricultural season 2021-2022 in one of the farms Located in Al-Muthanna Governorate / Al-Majd District, the investigation was applied using the randomized complete block design (R.C.B.D.) according to the system of factorial experiments inside the incision and with three replications, The treatment of irrigation periods in the main panels and the factorial treatments of biological and organic fertilization in Secondary panels, The biological fertilization treatments included the use of two levels (adding the bacterial vaccine and not adding it) and the organic fertilization treatments (buffalo waste) in which three levels were used (0, 40, 80 tons ha-1), while the treatments of the irrigation periods were At two levels (50 and 75%) of the field capacity. The results indicated that the treatment of adding bio-fertilizer was significantly superior to the comparison treatment. The highest values were recorded in each of the concentrations of N.P.K. available in the soil after harvest, achieving an increase of (26.81%, 13.21%, and 12.85%) sequentially, as well as the percentage increase in the number density of A.brasilense bacteria in the soil during the flowering stage was 73.03%, The percentage of increase achieved in each of the characteristics of biological yield and grain yield was (19.80%, 5.17%) respectively. Whereas the levels of organic matter were significantly affected, achieving an increase in the concentration of N.P.K. available in the soil (31.30%, 48.33% and 29.22%), respectively, the numbers of A.brasilense in the soil during the flowering stage 37.33%, biological yield 32.88%, and grain yield 20.09%. As for the irrigation periods, they did not significantly affect the studied Adjectives.