  This article presents a calculation of the mean electromotive force arising
from general small-scale magnetohydrodynamical turbulence, within the framework
of the second-order correlation approximation. With the goal of improving
understanding of the accretion disk dynamo, effects arising through small-scale
magnetic fluctuations, velocity gradients, density and turbulence
stratification, and rotation, are included. The primary result, which
supplements numerical findings, is that an off-diagonal turbulent resistivity
due to magnetic fluctuations can produce large-scale dynamo action -- the
magnetic analogue of the "shear-current" effect. In addition, consideration of
$\alpha$ effects in the stratified regions of disks gives the puzzling result
that there is no strong prediction for a sign of $\alpha$, since the effects
due to kinetic and magnetic fluctuations, as well as those due to shear and
rotation, are each of opposing signs and tend to cancel each other.
