氮肥运筹对超级稻盐丰47产量及氮素利用率的影响

Effect of N-Management on the Yield of Yanfeng 47,a Super Rice Variety,and Nitrogen Use Efficiency

探讨了氮肥运筹对超级稻盐丰47产量及氮素利用率的影响,结果表明:基蘖肥与穗肥比例为2:5:3的B处理,获得了产量731.5kg/667m2,分别比C(3:4:3)、D(3:5:2)、A(2:4:4)处理增产了4.1%、4.8%、9.3%。同时表现为B处理的单位面积有效穗数、颖花数、抽穗至成熟期干物质积累量占产量的百分比及结实率、氮素利用率均高于C、D、A处理。

The effect of nitrogen management on the yield of Yanfeng 47, a super rice variety, and nitrogen use efficiency was studied. The results showed that the yield from treatment B, the basal fertilizer： tiller fertilizer： panicle fertilizer being 2：5：3 （2：5：3）, was 731.5 kg/667 m^2, higher than those of treatment C （3：4：3）, treatment D （3：5：2）, and treatment A （2：4：4） by 4.1%, 4.8%, and 9.3%, respectively. Meanwhile, the effective panicles and flowers per area, the percentage of dry matter accumulated from heading to maturing to total grain weight, kernel set and nitrogen utilization efficiency obtained in treatment B were more than those of treatment C, treatment D and treatment A.