育肥羊饲喂全混合日粮条件下瘤胃固相食糜外流速度及其有效降解率的评定

doi:10.16431/j.cnki.1671-7236.2017.02.022

Abstract

Abstract:

This experiment was amied to measure the rumen digesta passage rate and effective degradation of DM,OM and CP of finishing lambs feeding the total mixed ration (TMR).Three Kazakh wethers with (30.0±3.7)kg body weight and permanent rumen fistula were chosen and the 3×3 Latin square design was adopted.Three kinds of TMR were designed of which the energy level were same and CP levels were 11%,12% and 13%,respectively. Acetic acid ytterbium (Yb-ac) was used as solid phase chyme marker to measure the Yb element decay curve plotted by NLIN regression and figure out its outflow rate (Kp),and calculate the rumen effective degradability rate of TMR.The result showed that the Kp value of three kinds of TMR were 6.71,6.66 and 7.59 %/h,respectively. Under these conditions,the effective degradation rate of DM,OM and CP of TMR1 were 39.82%,38.58% and 43.87%,that of TMR2 were 35.70%,34.40% and 36.86%,while that of TMR3 were 42.46%、41.29% and 51.28%.The average rumen retention time were 26.49,28.98 and 21.73 h,respectively. The results of this study provided some important parameters for further evaluating DM and RUP-AA intestinal digestion of TMR.

Key words: rumen; passage rate; effective degradation; finishing lambs

CLC Number:

S826

GAO Xin-mei, ZHENG Meng, NIU Lu, YIN Hua, CHEN Dao-fu, LIU Chen-li, GAO Wei. Measurement of Rumen Digesta Passage Rate and Effective Degradation of Finishing Lambs Feeding the Total Mixed Ration[J]. , 2017, 44(2): 456-462.

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Measurement of Rumen Digesta Passage Rate and Effective Degradation of Finishing Lambs Feeding the Total Mixed Ration

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