【摘要】 试验以水稻为研究对象,设定水、肥两种处理因素,2个水分处理(节水灌溉、CK)和5个氮肥处理(N0、N1、N2、N3、N4),分析水肥耦合对水稻产量及穗部形态的影响。结果表明:节水灌溉较CK促进水稻产量的形成,在N1、N2、N3时增产均超过10%,在N0、N4时产量差异不显著;随着施氮量的增加,节水灌溉与CK处理产量均呈现先增加后减少的变化趋势,节水灌溉N3施肥模式产量最高,其次是节水灌溉N2和对照灌溉N3。N2、N3条件下,节水灌溉较CK增产的主要是二次枝梗产量的增加,其中N2、N3处理分别增产30.69%、30.70%;节水灌溉N3较N2产量增加,主要是穗粒数和千粒重显著增加,N3条件下节水灌溉与CK比较,产量性状差异不显著,但节水灌溉促进了水稻各项产量性状均值的增加;对穗部结构分析,节水灌溉较CK二次枝梗数显著增加是产量增加的主要因素。更多还原

【Abstract】 Taking japonicarice as experimental material,two factors were set up,the water and the fertilizer handled,two water treatments(water-saving irrigation,CK)and five N fertilizers(N0,N1,N2,N3,N4)were studied,the effect of water and fertilizer coupling on panicle-architecture and yield of rice was analyzed.The results showed that compared with CK,it was promote with the yield of rice under the formation of water-saving irrigation,the yield was more than 10%increased under the N1,N2,N3.It was not significantly difference under N0 and N4,increasing with the amount of N applied,the yields of water-saving irrigation and CK showed a tendency to increase,but when the amount of N applied was too high,the water-saving irrigation and CK were reduced.It was showed a high yield under Irrigation N3,followed with N2 and control irrigation N3.The yield was high irrigation N3 to N2,because the increase secondary branch when it was under N2、N3,Irrigation N2 was increased 30.69%,and N3 was increased 30.70%.The yield of irrigation N3 was higher than N2,because of the increased of the number of grains per spike and grain weight.The yield was not significant difference when under irrigation N3 and CK.However,the promotion of water-saving irrigation increased the yield traits,analysis of the panicle-architecture,the significant increased in the number of secondary branches was the main factor compared with irrigation to CK.更多还原