Potato fertilizer absorption and distribution dynamic at different fertilizer levels were analyzed in '3414' design, and the nitrogen absorption characters at different growth periods in potato were made clearly. The total nitrogen content of aboveround part during the growth period was low at the seedling stage, high at the tuber formation stage, and declined slowly at the tuber maturity stage. The nitrogen content concentration of the above-ground part changed more than those of potato tubers and the contents of nitrogen in potato tubers were the highest at the ...