摘要
Abstract
This experiment was conducted to investigate the effects of mixed storage of broad bean skins and corn straw on growth performance,slaughter performance,rumen fermentation parameters and blood bio-chemical indexes of beef cattle.Forty-eight Luxi yellow cattle with a body weight of[(245.41±15.54)kg]and good body condition were randomLy divided into 4 groups with 12 cows in each group.The main roughag component of the control group was whole corn silage.Experimental groups Ⅰ,Ⅱ and Ⅲ were mixed with 30％(group Ⅰ),60％(group Ⅱ)and 100％(group Ⅲ)broad bean husks and corn straw to replace whole corn silage,respectively.The pre-test period was 10 days,and the experimental period was 80 days.The results showed as follows:① the dry matter feed intake of group Ⅲ was significantly higher than that of the control group,group I and group Ⅱ(P<0.05).② The ammonia nitrogen(NH3-N)content of group Ⅲ was significantly higher than that of the control group(P<0.05).The acetic acid(AA)content of group Ⅲwas significantly lower than that of the control group,group Ⅰ and group Ⅱ(P<0.05).The propi-onic acid(PA)content of group Ⅱ was signifi-cantly higher than that of the control group and group Ⅰ(P<0.05).The acetic acid/propionic acid values of groups Ⅱ and Ⅲ were significantly lower than those of the control group(P<0.05).③ The alanine amino-transferase(ALT)activity in group Ⅲ was significantly higher than that in the control group(P<0.05);the tri-glyceride(TG)content in group Ⅲ was significantly lower than that in the control group,group Ⅰ,and group Ⅱ(P<0.05).In summary,the use of broad bean husk mixing instead of whole corn silage had no sig-nificant effect on slaughter performance of beef cattle,but it could improve feed intake,promote daily gain,promote rumen fermentation,improve energy utilization rate,reduce feed cost and improve production effi-ciency.Therefore,mixed storage of broad bean skin and corn stalks can be used instead of whole plant corn silage for feeding beef cattle,reducing feed costs and improving production efficiency.关键词
蚕豆皮混贮/鲁西黄牛/生长性能/屠宰性能/瘤胃发酵参数/血液生化指标Key words
broad bean skin mixing/Luxi yellow cattle/growth performance/slaughter performance/rumen fermentation parameters/blood biochemical index分类
农业科技
