硝酸盐对肉牛甲烷产量和生长性能的影响

发布时间：2018-01-21 00:33

本文关键词： 硝酸盐甲烷肉牛呼吸测热室生长性能　出处：《中国农业大学学报》2017年07期 　论文类型：期刊论文

【摘要】：为研究硝酸盐对肉牛甲烷排放,瘤胃发酵和生长性能的影响,采用体内和体外试验。体外试验用单因素设计,分为对照组,1%硝酸盐组和2%硝酸盐组,试验重复进行3次;在体内试验中,选用8头草原红牛,采用单因素随机分组设计,分为对照组(体重(229.5±50.1)kg)和硝酸盐组((体重232.3±37.7)kg),每组4头。试验共56d,包括14d预饲期,39d生长期以及3d呼吸测热期。结果表明:在体外试验中,在1%和2%硝酸盐下甲烷量分别下降15.2%和46.2%,在体内试验中1%的硝酸盐可以抑制28.5%的甲烷产量,且饲喂后4h内抑制效果显著(P0.05),甲烷产量与干物质采食量之比以及甲烷能与总能比表示时分别下降31.8%,且对总挥发性脂肪酸产量有显著抑制效果(P0.05),但日增重、饲料转化率和营养消化率并未增加。硝酸盐可以持续有效地抑制甲烷,但未对生产性能产生促进作用。
[Abstract]:In order to study the effect of nitrate on methane emission, rumen fermentation and growth performance of beef cattle, in vitro and in vivo experiments were carried out. The experiment was repeated 3 times; In vivo experiment, 8 steppe red cattle were selected and single factor random grouping design was used. The rats were divided into control group (229.5 卤50.1 kg) and nitrate group (232.3 卤37.7 kg 路kg ~ (-1)) for 56 days, including 14 days prefeeding period. The results showed that methane content decreased 15.2% and 46.2% at 1% and 2% nitrate in vitro, respectively. In vivo, 1% nitrate could inhibit the methane production of 28.5%, and the inhibition effect was significant within 4 hours after feeding (P0.05). The ratio of methane yield to dry matter intake and the ratio of methane energy to total energy decreased by 31.8%, respectively, and the total volatile fatty acid yield was significantly inhibited by P0.05%, but the daily gain was increased. The feed conversion rate and nutrient digestibility did not increase. Nitrate could inhibit methane continuously and effectively, but it did not promote the production performance.
【作者单位】：吉林农业大学动物科学技术学院;吉林农业科学院畜牧科学分院;
【基金】：基金项目:优质高档肉牛选育技术合作研究与开发(2014DFA32080)
【分类号】：S823.5
【正文快照】： 反刍动物瘤产生的甲烷占到了动物总甲烷产量的90%以上,不但影响气候变化[1],同时也是动物能量的一种损失形式[2]。目前大众对畜产品的需求越来越高[3],温室效应也得到了更多关注,许多报道也明确了多种甲烷抑制方法。瘤胃内产生甲烷的过程是通过甲烷菌增加对氢气的利用,促进了

【参考文献】