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| 日粮营养水平对西杂育成母牛日粮消化能和粪能排出量的影响 | |
| 引用本文： | 黄洁,申跃宇,姜军,李强,朱跃明,莫放.日粮营养水平对西杂育成母牛日粮消化能和粪能排出量的影响[J].中国草食动物,2011,31(3):18-21. |
| 作者姓名： | 黄洁 申跃宇 姜军 李强 朱跃明 莫放 |
| 作者单位： | 1. 中国农业大学动物营养学国家重点实验室,北京,100193 2. 国家肉牛产业技术体系饲料营养功能研究室,北京,100193 3. 国家肉牛产业技术体系张掖综合实验站 4. 中国农业大学动物营养学国家重点实验室,北京,100193;国家肉牛产业技术体系饲料营养功能研究室,北京,100193 |
| 基金项目： | 农业公益性行业科研专项(nyzx07-035); “饲料营养价值与畜禽饲养标准研究与应用”(200903006) |
| 摘 要： | 为了研究日粮营养水平(精料进食水平)对肉牛日粮消化能和粪能排出量的影响,试验选用体况良好、体重一致(347 kg±25 kg)的杂交后备母牛(西门塔尔牛(♂)×中国黄牛(♀))16头,随机分为4组,即处理Ⅰ组、Ⅱ组、Ⅲ组和Ⅳ组,每组4头,各试验组日粮精料进食量分别为1.5、2.5、3.5和4.5 kg,粗料(青贮)自由采食。总试验期为30 d,预饲期20 d后进入正试期,试验期最后7 d全收集粪样。结果表明:不同日粮处理间全消化道蛋白质、淀粉的表观消化量和日粮消化能有显著差异(P<0.05),并随日粮营养水平(精料进食水平)的增加而增加,但不同日粮处理间中性洗涤纤维(NDF)和酸性洗涤纤维(ADF)的表观可消化量没有差异,粪中能量的排出量也没有明显差异(P>0.05)。日粮可消化有机物与消化能的进食量呈直线强相关,即消化能DE(MJ/d)=0.669+18.476 DOM(kg/d)(R2=0.999 6,n=4)。 |
| 关 键 词： | 肉牛 营养水平 消化能 粪能 |
Effects of Dietary Nutrient Intake on the Digestible Energy and Fecal Energy in Heifers |
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| Huang Jie,Shen Yue-yu,Jiang Jun,Li Qiang,Zhu Yueming,Mo Fang.Effects of Dietary Nutrient Intake on the Digestible Energy and Fecal Energy in Heifers[J].China Herbivores,2011,31(3):18-21. | |
| Authors: | Huang Jie Shen Yue-yu Jiang Jun Li Qiang Zhu Yueming Mo Fang |
| Institution: | Huang Jie1,Shen Yue-yu1,Mo Fang1,2,et al(1.State Key Laboratory of Animal Nutrition,China Agricultural University,Beijing 100193,China,2.Feed and Nutritional Research of laboratory,National Beef Cattle Industrial Technology System,China) |
| Abstract: | The objective of this study was to determine the effect of dietary nutrient intake on the digestible energy.Four dietary treatments were designed in a 4 × 4 factorial arrangement.Heifers were allotted by the following dietary treatments:①1.5 kg concentrate;②2.5 kg concentrate;③3.5 kg concentrate;④4.5 kg concentrate.All feces were collected using the direct collection during the last week.The results showed that apparent digestible organic matter,protein,starch and digestible energy were significantly different(P<0.05) among the different treatments.The excretion of fecal energy has no significant differences among different nutrient intakes(P>0.05).As the digestible organic matter increased,the digestible energy linearly increased(P<0.01),the regression equation was DE(MJ/d)=0.669+18.476 DOM(kg/d). |
| Keywords: | heifers nutrient intake DE fecal energy |
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