  We suggest a model for star formation function and a model for dissipation of
the turbulent energy of interstellar medium. Star formation function takes into
account the effect of turbulization of the ISM. It is shown that application of
mentioned relations to the hierarchical scenario of formation of galaxies
allows to explain the observed delay of star formation in the Galaxy that
corresponds to the range of stellar ages from 8--9 to 10--12 Gyr.
