© 2012, CERN for the benefit of the LHCb collaboration. The charged−particle production ratios p/p, K − /K + , π − /π + , (p + p)/(π + +π − ), (K + +K − )/(π + + π − ) and (p+ p)/(K + + K − ) are measured with the LHCb detector using 0.3 nb −1 of pp collisions delivered by the LHC at √s = 0.9 TeV and 1.8 nb −1 at √s = 7 TeV. The measurements are performed as a function of transverse momentum p T and pseudorapidity η. The production ratios are compared to the predictions of several Monte Carlo generator settings, none of which are able to describe adequately all observables. The ratio p/p is also considered as a function of rapidity loss, Δy ≡ y beam − y, and is used to constrain models of baryon transport.