The contents,accumulation rates,distribution and translocation of nitrogen, phosphorus and potassium in the aboveground parts of plant of summer maize ( Zea mays L.) grown in sand-loam soil and having yield level of 975 kg/mu (14625 kg/ha) were studied. The results showed that N, P_2O_5 and K_2O in aboveground parts accumulated up to 18.2, 4.9 and 17.1 kg/mu at the stage of grain maturation, with the ratio 3.7:1:3.48, and their peak accumulation rates were 405, 109 and 597 kg/mu·d, respectively. Amounts of ...