荒漠绿洲农田生态系统玉米生育期和产量对不同水肥处理的响应

采用二因子旋转回归设计,研究了灌溉和N肥用量对玉米生育期、生物量和产量的影响。结果表明,在干旱的沙坡头绿洲农田生态系统中,水分是影响玉米生长的首要因素,在一定的灌溉范围内,灌水量的增加能促使玉米生育期提前、生物量和产量增加;N肥对玉米性状的影响较灌溉处于次要地位,但是在一定的灌溉条件下,N肥对玉米的生长仍然起重要作用,大喇叭口期追肥的作用最为显著。

Effect of Different Water and Fertilizer Treatment on the Growing Stage and Yield of Maize in Desert Oasis Agro-ecosystem

The water and fertilizer coupling experiment was conducted at shapotou desert experimental research station, the purpose was to find out the most important affection factors of maize growing stage and proper water and fertilizer coupling treatment. The experiment results indicated that water was the chief affection factor in Shapotou farming area, within the appropriate irrigation range, the increasing of irrigation can impel the increase in maturity earlier, the biomass and yield of maize. The effect of nitrogenous fertilizer to maize characters was subordinate comparing to the irrigation, but in the same irrigation condition, the effect of nitrogenous fertilizer was remarkable, the fertilization effect was the most remarkable in big bell-mouthed stage.