微贮、氨化稻秸饲喂西镇牛效果分析

Growth Performance of Xizhen Cattle Fed Either Urea or Microbial Treated Rice Straw

为充分利用农作物秸秆发展节粮型畜牧业,并解决秦巴山区反刍动物的越冬饲料问题,在西乡县西镇牛场利用微贮、氨化稻秸饲喂西镇牛在舍饲条件下进行饲养试验,观察增重效果。本试验选用9头11.5岁平均体重为562kg的西镇牛,随机分成3组,分别饲喂微贮、氨化和未处理稻秸,三组西镇牛麦麸的补饲量相同。结果表明:微贮和氨化稻秸的粗蛋白、粗纤维、粗脂肪的含量分别为4.8%,30.0%,1.66%和5.5%,29.9%,1.54%。试验Ⅰ组:(微贮稻秸+麦麸),试验Ⅱ组:(氨化稻秸+麦麸)和对照组(稻秸+麦麸)的平均日增重分别为:1.004±0.19kg,1.080±0249kg,0.481±0.072kg,试验Ⅰ组和Ⅱ组试验牛的平均日增重大于(P<0.05)对照组,但试验Ⅰ组和Ⅱ组之间的平均日增重差异不显著(P>0.05)。微贮稻秸饲喂西镇牛的经济效益最高。微贮和氨化稻秸可作为冬季饲料缺乏季节黄牛的基本饲料。

In order to fully utilize the crop residues in developing grain saving animal husbandry and provide winter feeds for ruminants in Qinba Mountain area, a feeding trial of Xizhen cattle fed microbial, urea treated or untreated rice straw were conducted in Xizhen cattle breeding farm of Xixiang county of Shaanxi province to investigate its growth performance. Nine cows aged 1 to 1.5 year-old with 562 kg (± 28.8 kg) weighed BW were randomly divided into three groups which received urea treated (group 1), microbial treated rice straw (group 2) or untreated rice straw (control group), respectively. 1% wheat bran supplement was fed to all cows in the experiment. The result showed that crude protein, fiber and fat percentage of microbial and urea treated rice straw were 4.8%,30.0%,1.66% and 5.5%,29.9%,1.54%.The average BW gain of cows in three groups was 1080, 1004, and 481 g/d, respectively; cows of group 1 and 2 had a greater ( P < 0.05) BW gain than that of control group, but the average daily gain was similar (P > 0.05) between group 1 and 2. The economic analysis suggested a higher profits for cows fed microbial treated rice straw. In conclusion, urea and microbial treated rice straw can be used as a basic diet for cattle during the winter feed deficiency.;