氮肥施用量及运筹模式对晚粳稻新品种宁84产量及氮肥利用率的影响

Effects of Nitrogen Fertilizer Application Rate and Application Pattern on Grain Yield and Nitrogen Use Efficiency of Late Japonica Rice New Variety “Ning 84”

以晚粳稻新品种宁84为供试材料,于2015年在宁波进行了不同施氮量(0、12、15、18 kg/667 m^2)和不同氮肥运筹模式(基蘖肥∶穗肥=6∶4、7∶3、8∶2、9∶1)对宁84产量及氮肥利用率影响的大田试验。结果表明:宁84在浙江省中上地力田块做单季晚稻栽培时,其最佳处理组合为施氮量15 kg/667 m2、基蘖肥∶穗肥=6∶4;在此组合条件下,宁84的经济性状较协调,籽粒产量和氮肥利用率最高。

Late japonica rice new variety ＂Ning 84＂was used as experimental material,and the effects of different application rates（ 0,12,15 and 18 kg/667 m^2） and application patterns（ base and tiller fertilizer ∶panicle fertilizer= 6 ∶4,7 ∶3,8 ∶2,and 9 ∶ 1） of nitrogen fertilizer on the grain yield and nitrogen use efficiency of＂Ning 84＂were studied through field experiment in Ningbo city in 2015. The results indicated that： when ＂Ning 84＂was planted as single-cropping late rice in moderate-fertility field in Zhejiang province,the best application rate of nitrogen was 15 kg/667 m2,and the optimum ratio of base and tiller fertilizer to panicle fertilizer was 6 ∶ 4; under the above best combination conditions,＂Ning 84＂had more harmonious economic characters,the highest grain yield and the highest nitrogen use efficiency.