The rule of rice—soil nutrient releasing and the effect of nitrogenous, phosphate and potash fertilizer on yield in the east are of Jilin province vary with different rice—soil subclass.Nitrogenous fertilizer has the best effect in alluvial rice—soil, secondly in Baijiang—type rice—soil. Phosphate and potash fertilizer have fairly good effect in Lengjiang—type and Baijiang—type rice—soil.The amount of Soil quick—acting nutrients and availability of fertilizers are various among the different rice—soil subclass, the difference of preceding are larger than following.A neqative correlation is shown between availability and content of soil quick—ac ting nutrient in the same subclass.The interrelation degrees are different according to the different subclass.When increasing appiying rate of fertilizer, the availability falls lightly, and goes up with yields.The Varing extents of availability of soil quick-acting nutrient between the years with high or low temperature are obviously larger than the varying extents of availability of fertilizer.Therefore, the percentage of nutrient uptaked by rice from fertilizers in the year with low temperature increases comparatively。