Measurement of the Ratio of Inclusive Cross Sections ppbar->Z+b/ppbar->Z+j at DZero Run II

We study the b-jet production in association with Z boson at DZero using Run II data collected between August 2002 and September 2003 corresponding to about 180 pb-1 of recorded luminosity. We also present a measurement of the ratio of cross sections for Z+b to Z+j inclusive jet productions.