氮肥用量对不同品质类型小麦群体动态及产量的影响

摘要

在大田条件下,以强筋小麦品种西农979和弱筋品种郑麦004为材料,研究了氮肥3种用量(120、225、330 kg/hm2)对小麦群体动态、灌浆持性及产量的影响.结果表明,2个小麦品种各生育期的群体总茎数都表现为330 kg/hm2＞225 kg/hm2＞120 kg/hm2,且330 kg/hm2处理与120kg/hm2处理间存在显著差异(P＜0.05).成穗率则表现为225 kg/hm2＞120 kg/hm2＞ 330 kg/hm2,且225kg/hm2与330 kg/hm2处理间存在显著差异(P＜0.05).籽粒干物质积累随灌浆进程推进呈增加的趋势.在不同施氮量下,西农979灌浆后期穗粒质量表现为120 kg/hm2＞330 kg/hm2＞225 kg/hm2,而郑麦004灌浆后期穗粒质量则表现为120 kg/hm2＞225 kg/hm2＞330 kg/hm2.西农979和郑麦004的产量均表现为330 kg/hm2 ＞225 kg/hm2 ＞120 kg/hm2,且330 kg/hm处理与120 kg/hm2处理间存在显著差异.%The effect of 3 nitrogen application amounts (120,225 and 330 kg/ha) on the population development,grain filling properties and yield of strong-gluten variety Xinong 979 and weak-gluten variety Zhengmai 004 was studied under field conditions.The results indicated that the total stem number of the two varieties all showed the trend:330 kg/ha＞225 kg/ha＞120 kg/ha at different growth stage,and the difference was significant between treatment 120 kg/ha ans 330 kg/ha(P＜0.05).The spike rate was 225 kg/ha＞120 kg/ha＞330 kg/ha,and the difference between 225 kg/ha and 330 kg/ha was significant (P＜0.05).The grain dry weight increased withthe proceeding of time.Under different amounts of nitrogen application,the dry weight of grains showed 120 kg/ha＞330 kg/ha＞225 kg/ha for Xinong 979and 120 kg/ha＞225 kg/ha＞330 kg/ha for Zhengmai 004.The grain yield of Xinong 979 and Zhengmai 004 all showed as 330 kg/ha＞225 kg/ha＞120 kg/ha,and the difference between the two treatments of 330 kg/ha and 120 kg/ha was significant for each variety.