The effect of the bacterial biofertilizer magaterium (Bacillus), phosphorus and vermicompost on some microbiological characteristics and the percentage of organic matter in the soil cultivated with potatoes

Abstract

A field experiment was conducted for potato plants in the field of the Agricultural Research and Experiment Station in Al-Muradiyeh of the Directorate of Agriculture of Babylon _ Babylon Governorate for the agricultural season according to the Factorial experience  RCBD design .  The addition of bacterial biofertilizer to treatment B1 gave the highest rate of microbial respiration to the soil with a value of 5.88 (mg CO2 g^-1 dry soil) and the highest percentage of total organic carbon in the soil, which amounted to 1.61%, as well as the highest percentage of organic matter in the soil after harvest, which amounted to 0.65 %, led to the addition of phosphorus sourcesThe treatment P2 gave the highest rate of microbial respiration for the soil with a value of 6.35 (mg CO2g^-1 dry soil) and the highest percentage of total organic carbon in the soil as it reached 1.54% and the highest percentage of organic matter gave 0.98%. Also, the addition of vermicompost to treatment F2 gave the highest Soil microbial respiration rate Its value was 5.36 (mg CO2 g^-1 dry soil), the highest percentage of total organic carbon in the soil, which reached 1.66%, and the highest percentage of organic matter in the soil after harvest, which reached 0.68%. (mg CO2 g^-1 dry soil) and higherThe percentage of total organic carbon in the soil reached 2.02% and the highest percentage of organic matter amounted to 0.75, and the binary interaction treatment B1F2 excelled by giving the highest rate of microbial respiration of the soil with a value of 6.73 (mg CO2 g^-1 dry soil) and the highest percentage of total organic carbon in soil Where it reached 1.83% and the highest percentage For organic matter, it amounted to 0.83%, and the two-overlap treatment P2F2 excelled by giving the highest rate of microbial respiration for soil with a value of 7.10 (mg CO2 g^-1 dry soil), the highest percentage of total organic carbon in the soil, which amounted to 1.79%, and the highest value for organic matter amounted to 1.50%, as well The B1P2F2 overlap treatment outperformed by giving the highest Soil microbial respiration rate of 6.63 (mg CO2 g^-1 dry soil) and the highest percentage of total organic carbon in the soil amounted to 2.55% and the highest percentage of organic matter amounted to 0.93%, and thus we recommend the use of biofertilizer, phosphate rock and vermicompost to achieve an improvement in microbiological characteristics and increase inThe percentage of organic matter in the soil after harvest.