Abstract: 【Objective】Effects of different phosphate (P) fertilizers application on soil phosphorus transformation as well as phosphorus uptake and utilization in wheat were investigated, which will provide theoretical basis for precise matching and efficient utilization of P fertilizer in soil - P fertilizer - crop system. 【Method】The pot experiment was conducted in Lime concretion soil and red soil including six treatments: no phosphate fertilizer (CK); application of calcium superphosphate (SSP), calcium magnesium phosphate (FMP), diammonium phosphate (DAP), calcium superphosphate (TSP) and ammonium polyphosphate (APP). The relationship between the phosphorus transformation in rhizosphere as well as non-rhizosphere soils with phosphorus accumulation in wheat at the jointing and anthesis stages was analyzed. 【Result】Soil Olsen-P concentration increased by 194%-662% after application of P fertilizer in Lime concretion soil. Soil Olsen-P concentration in wheat rhizosphere soil followed the order: APP, TSP, DAP, FMP, SSP, CK. The H₂O-P and NaHCO₃-Pi concentration was significantly increased, whereas the Residual-P concentration was significantly reduced after phosphate fertilizer application. Both H₂O-P and NaHCO₃-Pi concentration was positively correlated with soil Olsen-P. At the jointing stage, in comparison to that of the control, TSP and APP application increased NaHCO₃-Pi concentration by 41.0 and 36.0 mg·kg^-1 respectively. For the red soil, soil Olsen-P concentration in rhizosphere soil increased by 84%-791% as P fertilizer was applied. And soil Olsen-P concentration in DAP and TSP treatments was significantly higher than that of other P fertilizer treatments. The NaHCO₃-Pi and NaOH-Pi concentration increased by 275.2%-848.3% and 26.9%-58.3% respectively, which was positively correlated with rhizosphere soil Olsen-P concentration. After P fertilizer application, the most significant effects were found in DAP and TSP treatments. At the jointing stage, there was a significant positive correlation between shoot P accumulation and soil Olsen-P concentration in Lime concretion soil and red soil. When soil Olsen-P concentration increased by 1 mg·kg^-1, shoot P accumulation increased by 0.87 and 0.37 mg/pot respectively in Lime concretion soil and red soil. In Lime concretion soil, shoot P accumulation significantly increased by 15.44%-50.9% compared with the control as different P fertilizers addition, and the APP and TSP significantly increased shoot P accumulation and utilization efficiency in shoot than other P fertilizers. After P fertilizer application in red soil, shoot P accumulation and grain yield of wheat increased by 123.7%-643.9%, 75.5%-337.2% respectively. The grain yield, shoot P accumulation and P utilization efficiency in TSP treatments were significantly higher than that in other P fertilizer treatments. 【Conclusion】In lime concretion soil the concentration of H₂O-P and NaHCO₃-Pi was significantly increased after application of APP and TSP. In red soil, the NaHCO₃-Pi and NaOH-Pi concentration was significantly increased after the application of DAP and TSP. Therefore, in order to increase wheat P efficiency, APP or DAP was recommended as a proper fertilizer in lime concretion soil, while DAP or TSP was recommended as a proper P fertilizer in red soil.

Key words: lime concretion soil, red soil, different phosphate fertilizer varieties, phosphorus fractions, phosphorus utilization efficiency,  , winter , wheat