Strangeness enhancement and string fusion in nucleus-nucleus collisions

In a Monte Carlo code based on the Quark Gluon String Model it is shown that of Λ, Λ and Φ production, and a reduction of K− production and total multiplicities. The results are in reasonable agreement with most of the experimental data for hadron-hadron, hadron-nucleus and nucleus-nucleus collisions, especially with the large Λ enhancement, which is well reproduced. Predictions for PbPb collisions at plab = 200 GeV per nucleon are also presented.