A rhizobox study was conducted to compare the rhizosphere characteristics of two wheat genotypes,Luofulin(Pefficient wheat)and Zhongguochun(Pinefficient wheat)on two different P levels(P 0 mg/kg,P 100 mg/kg)and two contrasting soils(dark loessial soil and red soil).Biomass,phosphorus uptake,pH and acid phosphatase were measured.Results showed that under P applied treatmeant,the total biomass of Luofulin and Zhongguochun increased by 30.14% and 17.75%,total P uptake increased by 139.24% and 71.72% respectively on dark loessail soil,but two wheat genotypes in the red soil had no significant differences in total biomass.On dark loessail soil,the rhizosphere pH of Luofulin and Zhongguochun decreased by 0.30 and 0.12 respectively under P0 treatmeant，however,on red soil,the rhizosphere pH did not differ between the two genotypes under two P levels.Under P0 condition，there were no differences in rhizosphere acid phosphatase activities of two wheat genotypes on dark loessial soil，but on the red soil，the acid apase activity of Luofulin significantly higher than Zhongguochun.Under P100 condition，the acid apase activity of Luofulin significantly higher than Zhongguochun on dark loessial soil，but on red soil,it did not differ between the two genotypes.Results showed that there were differences in rhizosphere characteristics for two wheat genotypes on dark loessail soil and red soil.