Based on the soil phosphorus gradient obtained from two long-term stationary fertilizer experiments on loessial soil,an intact soil cores (20 cm in depth) experiment was conducted to study forms of phosphorus in leachate.The results show that phosphorus leached from loessial soil mainly in dissolved form(TDP),which accounted fur 82.5 percent of the total P(TP) in the leachate,and particulate phosphorus(PP) for only 17.9%.Molybdate reactive phosphoms(MRP),being a chief cnmponent of the dissolved phosphorus,constituted on average 77.1% of the total P in the leachate,whilst dissolved organic phosphorus (DOP) did 13.8%.The maximum TP concentration of the leachate reached to 3.95 mg L^-1 and TDP 3.57 mg L^-1,during the 60-day experiment with a sum irrigation rate of 357 mm in total,approximately equal to 36% of the total annual precipitation and irrigation.The maximum phosphorus loss by leaching was observed reaching to 1082 g hm^-2.The results also indicated that MRP,TDP and TP concentrations of the leachate were significantly correlated with Olsen-P content of the plough layers.