通过行距、播种量和施肥量正交设计,连续3年对川西北高原老芒麦草产量与种子产量进行比较分析.结果表明,行距与施肥量是影响产量的关键因素,播种量影响较小；处理主要通过增加枝条密度与高度而影响草产量,通过增加生殖枝比例与小穗数而影响种子产量；处理对鲜草、干草与种子的3年总产量都有显著影响,行距对鲜草与种子产量影响极显著；施肥量对鲜草、干草产量有显著影响,而对种子产量影响不明显；30 cm行距、45 kg/hm2氮肥草产量最高,50 cm行距、45 kg/hm2氮肥种子产量最高,产量是行距与氮肥量协同作用的结果.%In the study, Elymus sibiricus L. Cv. Chuancao No.2 was used as test material and a orthogonal design was utilized with three factors (row space, sowing rate and fertilizing amount) and four levels. The seed yield and forage yield in three consecutive years were determined and analyzed. The result showed; The row space and fertilizing amount were the key factors to affect yield of E. Sibisicus L, but sowing rate only had less influence. Larger density and height of branches lead to higher forage yield, yet larger ratio of fertile branch and more spikelets per fertile branch resulted in higher seed yield. All treatments significantly affected the total yield of fresh grass, hay grass and seed. Row spaces high significantly affected the yield of fresh grass and seed. Yet fertilizing amount had a significant influence on the yield of fresh grass and hay grass, and less influence on seed yield. In short, the synergy of row space and nitrogen fertilizer influenced yield of E. Sibisicus L. There was highest grass yield with the row space of 30cm and nitrogen of 45 kg/hm2, and highest seed yield with the row space of 50 cm and nitrogen of 45 kg/hm2.
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