【目的】新疆地处我国西北部，依据新疆的气候特征与现代畜牧业的急速发展所需的牧草种植需求。【方法】在探明种植比例对牧草生产性能影响的基础上，归纳出相对双优的混播模式，以紫花苜蓿、扁穗冰草两种牧草按豆禾比例（3∶7、4∶6、5∶5、6∶4、7∶3）进行同行种植人工草地与单播对比，分析其播种当年生长指标、茎叶比、生物量贡献率的变化。【结果】紫花苜蓿和扁穗冰草分别在4∶6和7∶3时株高趋于最高；紫花苜蓿在3∶7时叶长叶宽显示最高，扁穗冰草在6∶4比例下叶长最高和在单播下的叶宽最高；在叶茎比的对比下3∶7比例中紫花苜蓿品质较高和单播扁穗冰草品质较高。【结论】混播有利于提升牧草株高、叶长叶宽、叶茎比、生物量贡献率。

【Objective】Based on the climatic characteristics of Xinjiang and the demand of forage planting for the rapid development of modern animal husbandry, a relatively double-optimal mixed sowing pattern was derived based on exploring the influence of planting ratio on the production performance of forage.【Methods】The two forage grasses, Alfalfa and Flatgrass, were planted in the ratio of bean to grass(3:7, 4:6, 5:5, 6:4, 7:3) in comparison with single sowing, and the changes of growth index, stem to leaf ratio and biomass contribution in the year of sowing were analysed.【Results】Plant height tended to be highest in Alfalfa and Flatgrass at 4:6 and 7:3, respectively;Alfalfa showed the highest leaf length and width at 3:7, and Flatgrass showed the highest leaf length in6:4 ratio and the highest leaf width with single sowing; the quality of Alfalfa was higher in the 3:7 ratio and the quality of single sowing Flatgrass was higher in the comparison of leaf to stem ratio.【Conclusion】The mixed sowing was beneficial to improve plant height, leaf length and leaf width, leaf to stem ratio and biomass contribution.