We combined with the method of field test and lab analysis, and studied the effects on growth and yield of hybrid sweet sorghum“Azure One”under different application amount of nitrogen fertilizer. The results showed that: tested soil with lower organic matter, available nitrogen and available phosphorus content, and nitrogen is the decisive indicator of sweet sorghum on growth and development, Had a significant impact on the growth and yield of sweet sorghum, with the increasing of the amount of fertilizer, sweet sorghum plant height, biomass, yield and brix increased significantly, and the highest yield was 3816.75 kg/hm2 when nitrogen application rate of 300 kg/hm2. The biological fresh weight up to 901.15 g / strain and dry matter accumulation up to 530.15 g / strain when nitrogen fertilizer was 250 kg/hm2.%通过田间试验与室内分析，研究氮肥不同施用量对饲用杂交甜高粱天青1号生长发育及产量的影响.结果表明：在供试土壤肥力条件下，氮素对甜高粱生长及产量有显著影响.随着施肥量增加，甜高粱株高、生物量、产量及糖锤度显著增加，且施氮量为300 kg/hm2时产量最高，为3816.75 kg/hm2，施氮量为250 kg/hm2时生物鲜质量最高，为901.15 g/株，干物质积累高达530.15 g/株.
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