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| 不同RDP/RUP比例日粮对鲁西黄牛瘤胃发酵的影响 | |
| 引用本文： | 朱鑫,万发春,刘晓牧,宋恩亮,王之盛.不同RDP/RUP比例日粮对鲁西黄牛瘤胃发酵的影响[J].中国畜牧杂志,2011,47(13). |
| 作者姓名： | 朱鑫 万发春 刘晓牧 宋恩亮 王之盛 |
| 作者单位： | 1. 四川农业大学动物营养研究所,四川雅安,625014;山东省畜禽疫病防治与繁育重点实验室,山东济南,250100 2. 山东省畜禽疫病防治与繁育重点实验室,山东济南,250100;山东省农业科学院畜牧兽医研究所,山东济南,250100 3. 四川农业大学动物营养研究所,四川雅安,625014 |
| 基金项目： | 现代农业(肉牛)产业技术体系专项经费资助(MATS-Beef)Cattlesystem,NYCYTX-38) |
| 摘 要： | 试验选用3头体况健康,体重350 kg左右,并安装有瘤胃瘘管的鲁西黄牛,采用3×3拉丁方试验设计,饲喂3种RDP/RUP比例分别为1.00∶1.00(A组)、1.22∶1.00(B组)、1.50∶1.00(C组)的等能等氮日粮,研究其对瘤胃内环境参数的昼夜动态变化规律的影响。结果表明:瘤胃pH受日粮RDP/RUP比值差异的影响不显著(P>0.05),A、B和C组pH变化范围分别为6.53~6.94、6.44~6.84和6.45~7.03。各组瘤胃pH均在饲喂后2~4 h达到最低值,随后逐渐上升;瘤胃液尿素氮以C组最高,A、B 2组差异不显著(P>0.05)。各组瘤胃液尿素氮在08:00饲喂后2 h达到最高值,但20:00饲喂后各组变化趋势不一致。A、B 2组瘤胃液尿素氮浓度白天较低,夜晚较高,而C组正好相反;各组瘤胃液氨氮平均浓度差异不显著(P>0.05),动态变化趋势基本相同,均在饲喂后2 h达到最高值;瘤胃微生物蛋白(MCP)平均浓度随RDP/RUP比值升高而显著提高,C组显著高于A、B 2组(P<0.05)。各组瘤胃液MCP浓度均在饲喂后2 h达到最低值。结果显示,以瘤胃液MCP浓度为衡量指标,日粮适宜的RDP/RUP比例为1.50∶1.00。 |
| 关 键 词： | RDP/RUP 瘤胃发酵 瘘管 鲁西黄牛 |
Effect of the Dietary Ratio of RDP to RUP on Ruminal Fermentation of Luxi Yellow Cattle |
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| ZHU Xin,WAN Fa-chun,LIU Xiao-mu,SONG En-liang,WANG Zhi-sheng.Effect of the Dietary Ratio of RDP to RUP on Ruminal Fermentation of Luxi Yellow Cattle[J].Chinese Journal of Animal Science,2011,47(13). | |
| Authors: | ZHU Xin WAN Fa-chun LIU Xiao-mu SONG En-liang WANG Zhi-sheng |
| Institution: | ZHU Xin1,2,WAN Fa-chun2,3,LIU Xiao-mu2,SONG En-liang2,WANG Zhi-sheng1 |
| Abstract: | Three Luxi cattles fitted with ruminal fistulae were used in a 3 × 3 Latin square design to determine the effects of different ratios of ruminally degradable protein(RDP) to ruminally undegradable protein(RUP) on the ruminal internal environment parameters.The RDP/RUP were 1.00:1.00(A),1.22:1.00(B),1.50:1.00(C),respectively.The results showed that ruminal pH was not affected by RDP/RUP(P>0.05),and the average pH was 6.53-6.94(A),6.44-6.84(B) and 6.45-7.03(C).The minimum value of ruminal pH was observed at 2 to 4 h after feeding,then ascended gradually;The highest ruminal urea-N concentration was observed in group C,higher than that in group A and B(P<0.05).Ruminal urea-N concentration of all groups peaked at 10:00,but its variation tendency was different at night.The ruminal urea-N concentration of group A and B were higher during night and lower during day,but group C was inverse;RDP/RUP didn't affect ruminal NH3-N concentration(P>0.05),and there was a peak value of ruminal NH3-N concentration at 2 h after feeding and then declined gradually.Increasing ratio of RDP/RUP increased ruminal MCP production,and ruminal MCP production of group A and B were much lower than that of group C(P<0.05).The production of all groups reached lowest at 2 h after feeding,and then was increased gradually.In consideration of average ruminal MCP production,the optimum dietary ratio of RDP to RUP is 1.50:1.00 in Luxi cattle. |
| Keywords: | RDP/RUP ruminal fermentation ruminal fistulae Luxi cattle |
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