辽星1号高产高效栽培氮肥和密度管理研究

目的]研究辽星1号高产高效栽培的肥密管理模式。方法]以辽星1号为材料,研究不同氮肥水平、氮肥运筹方式及插秧密度对辽星1号产量、产量构成因子和经济效益的影响。结果]最适施氮量为225 kg/hm2,产量为9 550.5 kg/hm2,经济效益最高;在此基础上,氮肥运筹方式以基肥∶蘖肥∶穗肥∶粒肥=4∶3∶2∶1的处理产量最高,比对照处理增产16.7%;插秧密度为33.3 cm×15.0 cm时辽星1号产量较高。结论]适宜的氮肥管理模式和种植密度能够显著提高水稻产量。

N Feritilizer Rate and Management and Density of High Yield and Output Cultivation Technique for Liaoxing 1

Objective] The aim was to find out the N-fertilizer and density management of high yield and output cultivation technique for japonica cultivar Liaoxing 1.Method] Field experiment was conducted to study the effect of N fertilizer rate and management and density on the yield of Liaoxing 1 during 2008 to 2009.Result] The results showed that the higher economic benefit was obtained when N fertilizer was applied at 225 kgN/hm2,which could be regarded as optimum N fertilizer application rate for liaoxing 1.Meanwhile,the yield of Liaoxing 1 reached 11 572.5 kg/hm2 under the B(4∶3∶2∶1) treatment,which was increased by 16.7% compared to that under the D(3∶5∶2) treatment.In addition,it was found that the yield of liaoxing 1 was the highest under the treatment D5(33.3 cm×15.0 cm) in our experiment.Conclusion] The yield of rice could be significantly improved if the appropriate nitrogen management mode and planting density were applied.