Effects of dietary concentrate to forage ratio on growth performance,nutrient apparent digestibility,and rumen fermentation parameters in Yimeng Black goats
YIN Zhengyan
ZHANG Yongcui
XU Yunzheng
LIU Fangyuan
ZHAO Xiaodong
YIN Zuoguo
CHENG Guangmin
Abstract：The study aimed to investigate the effects of total mixed rations with different concentrate to forage ratios based on unconventional feed combinations on the growth performance,nutrient apparent digestibility,rumen fermentation parameters,and serum biochemical indices in Yimeng Black goats.A total of 54 healthy Yimeng Black ewes were randomly divided into three groups,with three replicates per group and six goats per replicate.The dietary concentrate to forage ratios for the three groups were 3∶7(group Ⅰ),4∶6(group Ⅱ),and 5∶5(group Ⅲ),respectively.The pre-test period was 10 days and the formal test period was 60 days.The results showed that the average daily feed intake of group Ⅱ was significantly higher than that of group Ⅰ(P＜0.05).The apparent digestibility of dry matter,crude protein,neutral detergent fiber,acid detergent fiber,and crude ash in groups Ⅱ and Ⅲ were significantly higher than in group Ⅰ(P＜0.05).The ruminal acetate content in group Ⅱ was extremely higher than in groups Ⅰ and Ⅲ(P＜0.01),and the total volatile fatty acid content was significantly higher than in groups Ⅰ and Ⅲ(P＜0.05).The serum total protein content in group Ⅲ was significantly lower than in group Ⅰ(P＜0.05).The serum urea nitrogen content in groups Ⅱ andⅢ was extremely lower than in group Ⅰ(P＜0.01).The serum total cholesterol content in group Ⅱ was extremely lower than in group Ⅰ(P＜0.01).The study indicates that a dietary concentrate to forage ratio of 4∶6 can better improve apparent digestibility of nutrients,increase ammonia nitrogen utilization,enhance rumen fermentation function,and achieve higher growth performance in Yimeng Black goats.
Keywords：dietary concentrate to forage ratioBlack goatsgrowth performancenutrient apparent digestibilityrumen fermentationserum biochemical indices
Publication Date：2025-06-28
Online Publishing Date：2025-08-21(First online date of this platform, not the publication date of the document)
Pages：5( 12-16 )