全收粪和指示剂法测定阉牛日粮有机物消化率的差异性分析  

The Apparent Organ Matter Digestibility in Different Diets Determined by Direct and Indirect Chromic Oxide or AIA Marker Methods for Steers

作　　者：陈瑶[1] 邢壮[1] 莫放[1] 徐萍[1] 姜军[1] 高博[1] 黄木家[1] 姜莉[1] 

机构地区：[1]中国农业大学动物科技学院动物营养学国家重点实验室,北京100094

出　　处：《畜牧兽医学报》2008年第2期176-181,共6页ACTA VETERINARIA ET ZOOTECHNICA SINICA

基　　金：农业部"十五"科技攻关课题(2002BA514-10-2-3);"十一五"国家科技支撑计划(2006BAD12B08-03)

摘　　要：选用两个肉牛消化代谢试验所测定的8个不同日粮有机物消化率,对比分析全收粪法、Cr2O3法、AIA法对所测定有机物消化率的影响。结果表明:用全收粪法、Cr2O3法、AIA法测定日粮有机物的表观消化率分别为67.43%、62.93%、72.15%,其中AIA法测定值显著高于Cr2O3法(P<0.05),外源指示剂Cr2O3在粪中回收率为90.74%,内源指示剂AIA回收率为118.17%。The objective of the experiment was to evaluate the efficacy of direct collection feces, Cr2O3 and AIA to predict OM digestibility （OMD） of diets. Four Simmental crossing steers and four Holstein steers in two experiments were respectively assigned randomly to feed alfalfa, hay, concentrate diets in a replicated 4 × 4 Latin square design to estimate OMD of eight different diets. All feces were collected during wk 1. The OMD evaluated with the Cr2O3 method were significantly lower to compare with the AIA method, and the OMD determined with the direct collection feces were not statistically significant difference with Cr2O3 or AIA method, but the difference of OMD determined by Cr2O3 and AIA method was significant （P〈0.05）. The fecal recovery of Cr2O3 was 90.74% and was lower than that of AIA （118.17%）. In conclusion,Cr2O3 may be used as a marker to measure digestibility in steers.

关 键 词：全收粪 CR2O3 AIA 有机物消化率 回收率 

分 类 号：S815.1[农业科学—畜牧学]