不同干稻草添加比例对海南黄牛和杂交牛生长性能和血清生化指标的影响

Effect of different addition ratios of rice straw on growth performance and serum biochemical indices of Hainan yellow cattle and crossbred cattle

在海南黄牛和杂交牛饲粮中添加不同比例干稻草,研究其对海南黄牛和杂交牛生长性能和血清生化指标的影响。试验设定饲粮粗精比为1:1,新鲜王草和干稻草作为粗饲料原料。干稻草添加到饲粮中的比例分别为0%(对照组)、10%(10%稻草组)和20%(20%稻草组)。饲养试验选定年龄、体重相近的海南黄牛和杂交牛各12头,各自平均分为3组,分别饲喂上述3种饲料60 d。结果显示,饲喂后,杂交牛的平均日采食量(ADFI)和平均日增重(ADG)极显著增高(P<0.001),料重比(F/G)极显著偏低(P<0.001)。与此同时,随着干稻草添加量的增加,平均日增重也极显著升高(P<0.001)。在各稻草处理组中,血清生化指标中除了总胆固醇(TC)外没有受到干稻草的影响,白蛋白(ALB)、血糖(GLU)和甘油三酯(TG)均受到了牛品种的影响。综上所述,在肉牛的饲粮中添加干稻草,有助于提升肉牛平均日采食量和平均日增重;相比黄牛组,杂交牛组表现了较好的饲养效果。

In order to increase the feed efficiency,Hainan yellow cattle and crossbred cattle were fed with diets with different addition ratios of dry rice straw and fresh king grass in the experiment,and the feeding effect as well as the effects of the mixed diets on growth performance and serum biochemical indices of Hainan yellow cattle and crossbred cattle were investigated and analysed.The ratio of roughage and concentrate is 1:1,and fresh king grass and dry rice straw were selected as materials of roughage.The addition ratios of dry rice straw are 0%(control group)、10%(10%rice straw group)and 20%(20%rice straw group),respectively.12 Hainan yellow cattle and 12 crossbred cattle with similar age and weight were divided into three groups(n=4),respectively,and fed with above three meals for 60 days.The results showed that after feeding,daily feed intake(ADFI)and average daily gain(ADG)were significantly higher,and feed/gain(F/G)was significantly lower,in addition,the ADG was increased with the increase of the addition of dry rice straw.In the serums of the three treatments,except for total cholesterol(TC),albumin(ALB),glucose(GLU),triglyceride(TG)were affected by cattle species.The addition of dry rice straw could contribute to improving the food intake and daily weight gain.In addition,compared with yellow cattle,the feeding effect of the mixed diets for crossbred cattle was better.