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Yeast culture increased the growth performance of Hu sheep during later stage of fattening

The objective of this study was conducted to study the effects of dietary different supplemental levels of yeast culture ( YC) on growth performanceslaughter performancevisceral organ development and meat quality of fattening Hu sheep

One hundred and twenty 3 to 4-month-old male fattening sheep with average body weight of 38 kg were randomly assigned to 4 groups with 5 replicates in each group 6 sheep in each replicate

The experiment was divided into two stages: early stage of fattening ( 1 to 60 d) and later stage of fattening( 61 to 90 d) and the ratio of concentrate to roughage of basic diet were 6040 and 7525 during early stage of fattening and later stage of fatteningrespectively Sheep in the control group were fed a basal diet during whole stage of fattening ( 1 to 90 d) ; during early stage of fatteningsheep in experimental groups were fed the basal diet supplemented with 5 ( group A) 10 ( group B) and 20 g /d ( group C) YCrespectively; during later stage of fatteningsheep in experimental groups w ere fed the basal diet supplemented w ith 10( group A) 20 ( group B) and 40 g /d ( group C) YCrespectively The pre-experimental period lasted for 7 daysand the experimental period lasted for 90 days The results show ed as follow s: 1) during early stage of fatteningthere w as no significant difference in average daily gain among all groups; during later stage of fattening and whole stage of fatteningthe average daily gain of group A was significantly higher than that of the control groupand the ratio of feed to gain was significantly lower than that of the control group 2) There were no significant differences in live weight before slaughtercarcass weightdressing percentageeye area and G value among all groups 3) The kidney weight of group A was significantly higher than that of the control groupand there were no significant differences in heartliverlung and spleen weights and their percentages of live weight before slaughter among all groups 4) There were no significant differences in rumenreticulumomasum and abomasum weights and their percentages of live weight before slaughter among all groups5) There were no significant differences in pHdrip loss rate and meat color among all groups

    It is concluded that under this experimental conditionthe supplementation of YC can not improve the slaughter performance and meat quality of fattening Hu sheepdiet supplemented with 10 g /d YC can increase the growth performance of Hu sheep during later stage of fattening

 

Chinese Journal of Animal Nutrition202032(5)

in

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