海南黄牛育肥前期日粮适宜精粗比研究

Study of appropriate concentrate to forage ratios of diets in pre-fattening Hainan yellow cattle

试验探讨育肥前期海南黄牛日粮的适宜精粗比,将16头海南黄牛随机分4组,分别饲喂不同精粗比(试验Ⅰ组20:80;试验Ⅱ组30:70;试验Ⅲ组40:60;试验Ⅳ组50:50)的日粮。试验期60 d。结果表明:与试验Ⅰ组相比,试验Ⅲ组平均日增重、平均日采食量和毛利润分别提高了49.89%、23.90%和105.81%(P<0.05),而料重比降低了33.24%(P<0.05);与试验Ⅳ组相比,试验Ⅲ组平均日采食量降低了9.27%(P<0.05)。试验Ⅲ组血清总蛋白水平显著高于试验Ⅰ、Ⅳ组(P<0.05);试验Ⅳ组血清尿素氮含量显著高于试验Ⅰ、Ⅱ组(P<0.05)。由此可知,适宜的日粮精粗比(40:60)可使育肥前期海南黄牛获得较好的生长性能,血清蛋白水平也有改善。

The experiment was undertaken to explore appropriate concentrate to forage ratio of diets in pre-fattening Hainan yellow cattle.Sixteen Hainan yellow cattles were randomly divided into four groups.Cattles were fed on diets of different concentrate to forage ratios(groupⅠ20:80,groupⅡ30:70,groupⅢ40:60,groupⅣ50:50)during the period of 60 days.The results showed that compared with group I,daily gain,feed intake,and gross profit of groupⅢwere increased by 49.89%,23.90%,and 105.81%(P<0.05),respectively,but feed to gain ratio of groupⅢwas decreased by 33.24%(P<0.05);feed intake of groupⅢwas reduced by 9.27%in comparison with that of group IV(P<0.05).Serum total protein contents of groupⅢwere markedly higher than those of groupⅠand groupⅣ(P<0.05);serum urea nitrogen level of groupⅣwas also significantly higher than those of groupⅠand groupⅡ(P<0.05).It can be concluded that appropriate concentrate to forage ratios of diets(40:60)could result in a better growth performance and an improved level of serum protein of pre-fattening Hainan yellow cattle.