Spin effects in the transport properties of a quantum dot with spin-charge
separation are investigated. It is found that the nonlinear transport spect
ra are dominated by spin dynamics. Strong spin polarization effects are obs
erved in a magnetic field. They can be controlled by varying gate and bias
voltages. Complete polarization is stable against interactions. When polari
zation is not complete it is power law enhanced by non-Fermi-liquid effects
.