A 3-year study (2016, 2017, and 2018) was conducted to compare the effects of alfalfa (ALF; cv. Yellowhead) (Medicago falcata L.) or sainfoin (SF; cv. AAC Mountainview) (Onobrychis viciifolia Scop.) in mixtures with either Russian wildrye (RWR; cv. Tom) (Psathyrostachys junceus [Fisch.]) or hybrid bromegrass (HBG; cv. Success) (Bromus riparius Rehm × B. inermis Leyss) on herbage dry matter yield (DMY) and nutritive value, and beef yearlings performance at two sites: Swift Current (Brown soil zone) and Lanigan (Thin Black soil zone), Saskatchewan, Canada. In 2015, in each site, sixteen 0.7-ha (in Lanigan) or 0.8-ha (in Swift Current) paddocks were established with replicated (n = 4) ALF-HBG, ALF-RWR, SF-HBG, or SF-RWR binary mixtures. Each year in August, yearling steers (16 ± 1 month and BW = 391 ± 1.7 kg and 350 ± 0.04 kg for Swift Current and Lanigan sites, respectively) were allocated to paddocks for an average 30-d grazing trial to utilize 40–60% of available herbage. The DMY (3629 ± 154 kg/ha) did not differ (P > 0.05) among mixtures at Swift Current. The HBG included (ALF-HBG and SF-HBG) mixtures produced 54% more (P < 0.01) DMY than RWR included (ALF-RWR and SF-RWR) mixtures (4542 vs. 2943 kg/ha, SEM = 303) at Lanigan. Legume contribution to DMY was greater at Swift Current than at Lanigan (33.1% ± 2.1% vs. 14.0 ± 1.7%), and ALF contributed more to DMY than SF at Lanigan (18.0 vs. 10.1%). Crude protein tended (P = 0.10) to be greater for RWR mixtures than HBG mixtures (93.5 vs. 83.4 g/kg DM for RWR and HBG mixtures, respectively) at Lanigan. The yearling steers had similar (P = 0.25) ADG (0.78 ± 0.03 kg/d) for the treatments at Swift Current. However, at Lanigan, the animal ADG differed (P < 0.01) with 0.88 and 0.90 kg/d for ALF-RWR and SF-RWR and 0.53 and 0.63 kg/d for ALF-HBG and SF-HBG mixtures, respectively. The HBG mixtures (ALF-HBG and SF-HBG) produced approximately 10 more grazing days (GD) (AUD/ha) than the RWR (ALF-RWR and SF-RWR) mixtures at both, Swift Current (95 vs. 88 AUD/ha, SEM = 9) and Lanigan (112 vs. 101 AUD/ha, SEM = 7) sites. Sainfoin-grass mixtures produced 8 and 3 GD less (AUD/ha) than ALF-grass mixtures at Swift Current and Lanigan, respectively. Overall, these results demonstrate that all 4 binary mixtures appear to be suitable for late summer and fall grazing to provide sufficient nutritive value and beef cattle steer performance in both soil zones of Saskatchewan, Canada.

进行了为期3年的研究（2016、2017和2018），以比较苜蓿（ALF; cv.Yellowhead）（Medicago falcata L.）或皂甙（SF; cv.AAC Mountainview）（Onobrychis viciifolia Scop。）的作用。与俄罗斯野草（RWR; cv。Tom）（Psathyrostachys junceus [Fisch。]）或杂种婆罗门草（HBG; cv。Success）混合使用（Bromus riparius Rehm×  B . inermis Leyss）对牧草干物质产量（DMY）和营养价值和一岁牛肉的表现，位于加拿大萨斯喀彻温省的两个地区：斯威夫特卡特（Current）（褐土区）和拉尼根（稀黑土区）。在2015年，在每个站点中，十六个0.7-HA（在拉尼根）或0.8公顷（以斯威夫特卡伦特）围场用复制（成立Ñ = 4）ALF-HBG，ALF-RWR，SF-HBG或SF-RWR二元混合物。每年八月，将一岁ste牛皮（Swift Current和Lanigan养殖场分别为16±1个月和BW = 391±1.7 kg和BW = 350±0.04 kg）分配给牧场，进行平均30天放牧试验，利用40-60可用牧草的百分比。在快速电流下，混合物中的DMY（3629±154 kg / ha）没有差异（P > 0.05）。包含HBG的混合物（ALF-HBG和SF-HBG）产生的DMY比包含RWR的混合物（ALF-RWR和SF-RWR）高出54％（P <0.01）（4542 vs. 2943 kg / ha，SEM = 303）拉尼根 在Swift Current，豆科植物对DMY的贡献大于Lanigan（33.1％±2.1％对14.0±1.7％），而ALF对LMY的DMY贡献大于SF（18.0对10.1％）。粗蛋白趋于（P = Rani的RWR混合物比HBG混合物高= 0.10（RWR和HBG混合物分别为93.5和83.4 g / kg DM）。 在Swift Current处理时，一岁公牛的日增重相似（P = 0.25）（0.78±0.03 kg / d）。但是，在拉尼根，动物的ADG有所不同（P<0.01），ALF-RWR和SF-RWR分别为0.88和0.90 kg / d，ALF-HBG和SF-HBG混合物分别为0.53和0.63 kg / d。在两种情况下，迅捷电流（95 vs. 88 AUD）的HBG混合物（ALF-HBG和SF-HBG）的放牧天数（GD）（AUD / ha）比RWR（ALF-RWR和SF-RWR）混合物多约10天/ ha，SEM = 9）和Lanigan（112 vs. 101 AUD / ha，SEM = 7）网站。皂素草混合物的产量分别比Swift Current和Lanigan的ALF草混合物减少了8 GD和3 GD（公顷/公顷）。总体而言，这些结果表明，所有四种二元混合物似乎都适合夏末和秋季放牧，以在加拿大萨斯喀彻温省的两个土壤区提供足够的营养价值和肉牛操舵性能。