氮肥后移对夏玉米生长发育和产量的影响

【Objective】 Study of late heavy nitrogen (N) dressing pattern on the growth and yield of Summer Maize in order to find out most N application pattern.【Method】Maize hybrids Sanbei21and Xianyu335 were used in the experiment. Two N application patterns, i.e. the traditional late heavy N dressing pattern (30% at sowing + 70% at twelve-leaf stage) and no basal late heavy N dressing pattern (70% at twelve-leaf stage +30% at silking stage) were compared based on a total N rate of 300kg/ha. 【Result】The results showed that there were no significant differences in plant height，leaf area per plant，seed weight and biomass between the two N dressing patterns, while grain yield of the traditional late heavy N dressing pattern is significantly higher than the no basal late heavy N dressing pattern. 【Conclusion】Traditional late heavy N dressing pattern can support maximum yield, which was a better N dressing Pattern.