Abstract: 【Objective】 To provide theoretic support for precision fertilization in the marine foreland to Yellow Sea of China,【Methods】this study used ASI (Agro Services International) method to test soil samples and recommend N, P, K fertilizers application rates, and conducted plot experiments of five treatments(①no fertilization, ② no N, ③no P, ④no K, ⑤all N, P, K and other fertilizers recommendation rates) and triplicate in 60 fields from low to high fertility in Haifeng farm in 2005 and 2006, and calibrate ASI soil test according to the typical response categories (50%, 75%, 95% of relative yield to soil nutrient values) to establish the abundance and deficiency index of soil available N, P and K for Rice in Marine Foreland Based on ASI soil testing and fertilizer recommendation. 【Results】The very low, low, medium ,high and very high index for soil NH4+-N were <2.5mgN L-1, 2.5mgN L-1～11.0mgN L-1, 11mgN L-1～19.5mgN L-1, 19.5mgN L-1～34 mg N L-1 and >34 mg N L-1 respectively. The very low critical concentration index for soil available P was not appeared in Haifeng Farm, the low, medium, high and very high critical concentration for soil available P were <13mgP L-1, 13mgP L-1～28.5 mg P L-1 , 28.5 mg P L-1～60 mg P L-1 and >60 mg P L-1 respectively. The critical very low, medium, high and very high concentration for soil available K were <35mgK L-1, 35mgK L-1～95mgK L-1, 95mgK L-1～175mgK L-1, 175mgK L-1～315mg N L-1 and >315mg N L-1 respectively. 【Conclusion】So that combining ASI systematic approach and field experiments would be rational and effective methods to establish the critical index of soil nutrient for rice.

Key words: Marine foreland, Rice, ASI, Nitrogen, Phosphorus, Potassium, Abundance and deficiency index