【Objective】To study the effect of mid-rotation fertilization on the growth of Pinus elliottii open pollinated families, and compare the differences of P fertilizer and liming.【Method】Three different treatments (NK as control, NK+Ca-Mg-P, NK+liming) were conducted in a 13-year P. elliottii open pollinated progeny test stand. The growth characteristics of P. elliottii were examined before and after fertilization，and the nutrition contents were analyzed in soil and needle.【Result】Mid-rotation fertilization had a significant effect on the increments of height, DBH and volume, while the interaction effect between family and treatment was not significant. Compared to NK treatment, NK+Ca-Mg-P and NK+liming significantly increased the height increment by 37.1% and 29.5% respectively, while the latter increased the volume increment by 22.5%. Meanwhile, the DBH increment of NK+liming treatment was higher than that of NK+Ca-Mg-P treatment.【Conclusion】Liming with NK fertilizers can increase the timber yield of P. elliottii The promotive effect of liming on growth of P. elliottii might be related to P instead of Ca.