日粮能量和蛋白水平对桂香雏鸡饲料营养物质表观消化率的影响  

Effects of dietary energy and protein levels on the apparent digestibility ratio of Guangxi Guixiang chicken

作　　者：李莉[1] 卜泽明 罗世乾[1] 许晟玮[1] 梁有国 梁朝时 梁明振[1] 

机构地区：[1]广西大学动物科学技术学院,南宁530005 [2]广西兽药监察所,南宁530001 [3]广西兴业和丰禽业有限公司,广西兴业537800

出　　处：《南方农业学报》2015年第2期344-348,共5页Journal of Southern Agriculture

基　　金：广西科学研究与技术开发计划项目(桂科攻0992004-4);玉林市科学研究与技术开发计划项目(玉市校科合201210504);梧州市科学研究与技术开发计划项目(梧科201001053)

摘　　要：【目的】明确桂香雏鸡日粮的适宜能量和粗蛋白需要量,为其饲养标准的制定提供理论依据。【方法】以1日龄桂香母鸡为研究对象,采用2因素3水平设计,设3个能量水平（11.57、12.17和12.77 MJ/kg）和3个粗蛋白质水平（17.5%,19.0%和20.5%）,探讨不同日粮能量和粗蛋白水平对桂香雏鸡阶段（1-4周龄）营养物质表观消化率的影响。【结果】日粮能量水平增加可有效提高桂香雏鸡的能量、粗蛋白、粗脂肪表观消化率,粗纤维表观消化率总体上也随日粮能量水平的提高而提高,钙、磷表观消化率的总体趋势呈先升后降,以中等能量水平下的表观消化率较高。随日粮蛋白水平的增加,除了显著降低粗蛋白消化率（P〈0.05,下同）及显著提高粗纤维消化率外,对其他营养物质表观消化率的影响均不显著（P〉0.05）。【结论】日粮能量和蛋白水平对桂香雏鸡饲料营养物质表观消化率有一定影响,实际生产中可选用能量和蛋白水平分别为12.77 MJ/kg和20.5%的日粮作为桂香雏鸡的主饲料。【Objective】The optimum ratio of dietary energy and protein level of Guangxi Guixiang chicken was determined to provide references for formulating its raising standard. 【Method】With Guangxi Guixiang chicken of 1 day as the research target, the experiment consisting of two factors and three levels was designed, which included three energy levels（11.57, 12.17 and 12.77 MJ/kg） and three protein levels（17.5%, 19.0% and 20.5%）. The effects of dietary energy and protein levels on the apparent digestibility ratio of Guangxi Guixiang chicken（1-4 weeks old） were explored.【 Result 】 The results showed that the diet increased energy levels significantly increased the apparent digestibility ratios of gross energy, crude protein and crude fat. The crude fiber digestibility generally went up with the increase of energy level. The apparent digestibility ratio of calcium and phosphorus went up and then down, which was the highest at a moderate energy level. The increasing of the dietary protein level caused a significant reduce in the apparent digestibility ratio of crude protein（P〈0.05, the same hereinafter）and a significant increase in the apparent digestibility ratio of crude fiber but no significance in the rest indexes（P 〉0.05）. 【Conclusion】The dietary energy and protein level have influence on the apparent digestibility ratio of Guangxi Guixiang chicken to some extent. In conclusion, the optimal dietary energy and protein level are confirmed as high metabolizable energy（12.77 MJ/kg） and high protein（20.5%）.

关 键 词：桂香鸡 日粮 能量 蛋白 营养物质 表观消化率 

分 类 号：S831.5[农业科学—畜牧学]