Abstract:In order to understand the influence of management strategies of greenhouse vegetable production (GVP) on the fractions and bioavailability of soil phosphorus(P), in this paper, soil samples encompassing a wide range of P status were collected in two typical GVP bases in Jiangsu Province:one with paddy soil in Guli Village of Nanjing City and one with fluvo-aquic soil in Xiahu Village of Xuzhou City, and the basic physiochemical properties and P fractions of the soil samples were analyzed. It was shown that Fe-P, O-P and organic P predominated in the paddy soil, while Ca-P contributed the most in the fluvo-aquic soil. With the increase of utilization intensity, the concentrations of soil available P, soluble P, Al-P, Fe-P, organic P and residual P in the paddy soil, the concentrations of soil available P, soluble P, Al-P, O-P, Ca-P and organic P in the fluvo-aquic soil, the percentages of W-P and Al-P to total P for both soil types were increased significantly (P<0.05), but O-P in paddy soil and residual P in fluvo-aquic soil were decreased significantly (P<0.05). Stepwise regression analyses revealed that Olsen-P was mainly contributed by Fe-P and Al-P in paddy soil, while by W-P and Ca-P in fluvo-aquic soil. It was worth noting that intensive agricultural inputs in GVP might increase the risk of P loss, especially for fluvo-aquic soil. Therefore, appropriate management strategies, such as paddy-upland rotation and lower fertilizer rate, are necessary to improve the bioavailability of soil P and achieve a sustainable progress of GVP.