The plant height, stem width, leaf area index, and the percent in the whole plant of N, P_2O_5, and K_2O were improved significantly compared with that without plastic-film.

• 合理的氮磷配比能促进玉米植株氮磷钾养分含量、营养生长指标、生物产量、品质指标产量的提高,氮和磷对营养生长指标、生物产量和品质指标产量的提高作用为N>P_2O_5,氮磷交互各处理中,N200P_2O_5150处理各指标表现得最好。