Abstract:

Abstract: To provide theoretic support for maize Production of Formula Fertilization by soil testing in Shajiang Black Soil Areas. Field Experiments on Fertilizer Efficiency of maize were carried in Shajiang Black Soil Areas. This study used ASI (Agro Services International) method to test soil samples and calibrate ASI soil test according to the typical response categories (50%， 65%，75%，85%，95% of relative yield to soil nutrient values) to establish the abundance and deficiency indices of soil available P for maize in Shajiang Black Soil Areas based on ASI soil testing and fertilizer recommend-ation. The very low， low, medium, higher，high and very high index for soil available P were ＜6 mg/L， 6～13 mg/L，13～21 mg/L，21～36 mg/L， and 36～60 mg/L，＞60 mg/L, respectively. This experiment suggested that the recommended fertilizer quantity were180kg/hm2，150kg/hm2，105kg/hm2，75kg/hm2，45kg/hm2.When soil available P were＞60 mg/L， the fertilizer quantity can be reduced or not applied.