Abstract: [Objective and Method]Best amount of densities and fertilizer can build excellent group structure and is the bases of group building under fine light effect, so this paper studies the yield and sugar content of stem in New Sweet Sorghum 3 after carrying out different densities and amount of fertilizer base on two factors and five level trial by using the group.The main purpose of this article was designed to study the effects of various amount of fertilizer and planting densities on the yield and sugar content of New Sweet Sorghum 3.[Result]The results showed that the plant fresh biomass,the yield of stem,grain,stem sugar content of New Sweet Sorghum 3 have varied significantly under the treatments of different densities and fertilizer in Ili area of north Xinjiang.All the fresh biomass yield,stem yield and sugar yield were lower from D1 to D5 under high planting density ; however,there were no significant difference under fertilizations; there were significant difference in seed yield under planting density and fertilization; also there were no difference in sugar content under planting density and fertilization. [Conclusion]It was suggested that the planting density of 166 650 plants per hectare and fertilization 450kg per hectare was appropriate for New Sweet Sorghum 3.

摘要： [目的]确定新高粱3号高产高效栽培适应的种植密度和施肥量.[方法]运用群体生理学的方法,采用两因素五水平完全组合试验设计,研究了不同种植密度和施肥量对甜高粱新高粱3号产量及茎秆汁液含糖量的影响.[结果]在北疆伊犁河谷地区,不同种植密度和施肥量影响下,新高粱3号生物产量、茎秆产量、产糖量和籽粒产量在生育后期均存在明显差异;生物产量、茎秆产量和产糖量在密度的作用下,从D1～D5呈现逐渐递减的趋势,在肥料的作用下,F1～F5这种趋势不明显;籽粒产量在密度和肥料的影响下变化趋势较为明显;含糖量在密度和肥料的影响下变化趋势不明显.[结论]处理D1F2即种植密度为166 650株/hm~2,施肥量为450 kg/hm~2(N 225 kg/hm~2,P_2O_5 150 kg/hm~2,K_2O 75 kg/hm~2)最为适宜.