Abstract: Changes of activities of protective enzymes [superoxide dismutase (SOD), catalase(CAT), peroxidase(POD)] and MDA contents in leaf. The result showed that activities of protective enzymes in P-efficient (tie-7555 and liaodou-13) increased more,and MDA increased less,however that in P-inefficient (feng-59-15 and liaodou-11) decrease, and MDA changed more. The tendency is activities of SOD and POD under P-deficiency stress in leaf increased.