Effects of dietary concentrate-to-roughage ratio on growth performance， serum biochemical parameters， rumen fermentation parameters， and economic benefits of Guiqian semi-fine wool sheep

• الحاوية / القاعدة: Siliao yanjiu
• المؤلفون الرئيسيون: LIU Jiang, WU Ping, PENG Hua
• التنسيق: مقال
• اللغة: الصينية
• منشور في: Editorial Department of Feed Research 2026-04-01
• الموضوعات: dietary concentrate-to-roughage ratio; Guiqian semi-fine wool sheep; growth performance; serum biochemical parameters; rumen fermentation
• الوصول للمادة أونلاين: http://SLYJ.publish.founderss.cn/thesisDetails#10.13557/j.cnki.issn1002-2813.2026.07.003

The experiment aimed to investigate the effects of dietary concentrate-to-roughage ratio on the growth performance, serum biochemical parameters, rumen fermentation parameters, and economic benefits of Guiqian semi-fine wool sheep in Northwest Guizhou. A total of 60 healthy male lambs with body weight of (20.29±1.58) kg were randomly divided into five groups, with three replicates per group and four lambs per replicate. Groups Ⅰ to Ⅴ were fed diets with concentrate-to-roughage ratios of 20∶80, 30∶70, 40∶60, 50∶50, and 60∶40, respectively. The pre-test period was seven days, and the formal test period was 75 days. The results showed that group Ⅲ had the highest average daily gain, which was significantly higher than that in groups Ⅰ and Ⅴ (<italic>P</italic>&lt;0.05). Group Ⅰ had the highest average daily feed intake, which was significantly higher than that in group Ⅴ (<italic>P</italic>&lt;0.05). Group Ⅲ had the lowest feed-to-gain ratio, which was significantly lower than that in groups Ⅰ and Ⅴ (<italic>P</italic>&lt;0.05). The content of serum urea nitrogen (BUN) in group Ⅲ was significantly higher than that in groups Ⅰ and Ⅱ (<italic>P</italic>&lt;0.05). Rumen fluid propionic acid content in groups Ⅰ, Ⅱ, and Ⅲ was significantly lower than that in groups Ⅳ and Ⅴ (<italic>P</italic>&lt;0.05), while the acetate/propionate was significantly higher than that in groups Ⅳ and Ⅴ (<italic>P</italic>&lt;0.05). The rumen fluid ammonia nitrogen content in group Ⅲ was significantly higher than that in group Ⅰ (<italic>P</italic>&lt;0.05). Group Ⅲ achieved the highest economic benefit, with net income increased by 18.77%, 13.84%, 21.85%, and 133.33% compared with groups Ⅰ, Ⅱ, Ⅳ, and Ⅴ, respectively. The study shows that an appropriate dietary concentrate-to-roughage ratio can effectively improve the growth performance and enhance economic benefits of Guiqian semi-fine wool sheep. Considering all indicators comprehensively, the diet with a concentrate-to-roughage ratio of 40∶60 yields the optimal effect.