Using Brassica napus P-efficient genotype 102 and P-inefficient genotype 105 as experiment materials,organic acids exudations based on nutrition solution culture,and the uptake and accumulation of P,Fe,Mn,Cu and Zn in plants under pot experiment were investigated under different P treatments,respectively.The results showed that under low P treatment,the total organic acid exudated by both genotypes was higher than that under high P treatment,and P-efficient genotype 102 released much more organic acids than P-inefficient genotype 105.In pot experiment,P,Fe,Mn and Zn uptake of both genotypes increased significantly with the increased P levels,and P concentration was negative correlated significantly with Fe,Mn,Cu and Zn.Under low-P treatment (P15),P-efficient genotype 102 could acquire much more P,Fe,Mn and Zn than P-inefficient genotype 105,which might be attributed to more organic acids improving the availability of these elements in soil.