ACTA VETERINARIA ET ZOOTECHNICA SINICA ›› 2014, Vol. 45 ›› Issue (7): 1196-1201.doi: 10.11843/j.issn.0366-6964.2014.07.024

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Effects of Different Fiber Sources on Growth Performance and Slaughter Performance in Graylag

HE Li-wen,MENG Qing-xiang,ZHANG Ya-wei,LI De-yong,HE Cui,REN Li-ping*   

  1. (State Key Laboratory of Animal Nutrition,College of Animal Science &Technology,China Agricultural University,Beijing 100193,China)
  • Received:2013-11-05 Online:2014-07-23 Published:2014-07-23

Abstract:

This experiment was conducted to study the effects of different fiber sources on growth performance and slaughter performance in graylag,and to provide references for scientific feeding.Two hundred and forty four-week-old graylags were randomly assigned to four dietary treatments based on body weight and sex,which included 30% corn stalk silage (CSS),steam exploded corn stalk (SECS),steam exploded wheat straw (SEWS) and steam exploded straw (SES),respectively,with fifteen replicates for each treatment and four graylags per replicate.The feeding trial lasted for 12 weeks including a two-week-transitional period and a ten-week-test period.Feed intake(FI),weight gain(WG) and F/G were determined every two weeks and dressing percentage(DP),eviscerated percentage(EP),hemi-eviscerated percentage(HEP),abdominal fat percentage(AFP),breast meat percentage(BMP) and thigh meat percentage(TMP) were measured at the end of experiment.The results showed that:1) comparing to the three steam exploded groups,group CSS had higher FI (P<0.01) and F/W (P<0.05),while there was no significant difference on WG (P>0.05) and there was also no significant difference on growth performance among the three steam exploded groups (P>0.05);2) As to slaughter performance,there was no significant difference among the four fiber sources (P>0.05),numerically, group SES had the lowest DP,EP and HEP,group CSS got the highest AFP and group SECS reached higher BMP and TMP.These results indicated that the four fiber sources had no significant effect on growth performance and slaughter performance of graylag except for daily FI and W/G,and steam exploded stalk groups had lower F/G,which indicate steam exploded technique may highly improve the utilization efficiency of crop straws.

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