Abstract: The effect of different fertilization strategies on the grass yield, water utilizing and nutrition uptake of a Sudangrass and Ryegrass rotation regime was studied in a two-year pot experiment. Application of NPK combinations improved the yield of Sudangrass and Ryegrass, and total yield for the two seasons of 2005 and 2006 was 1 690.0 g/pot, which was 700.7%, 426.4%, and 15.9% higher than that of the PK, NK, NP treatments respectively. In 2006 and 2007, total yield of the two seasons was 2 091.3 g/pot, which was 1 260%, 384.5% and 4.4% higher than that of the PK, NK, NP treatment respectively. The NPK combination promoted nutrient uptake of N, P₂O₅, K₂O by the forage grasses of 6.36, 1.83, 13.91 g/pot in 2005 and 2006 respectively, and of 4.91, 2.31, 7.64 g/pot in 2006 and 2007. Similarly, fertilizer utilization efficiencies of N, P, K were 59.4%, 33.9%, 96.0% in the first rotation and 47.4%, 39.8%, 43.1% in the second rotation giving an average fertilizer utilizing efficiency of 53.4%, 36.8%, 69.5%.