The Effect of Adding Flaxseed and Schizochytrium Powder to the Diet on Production Traits of Housed Yaks
Compared to yaks raised through grazing,yaks under stall-feeding exhibit faster growth rates and lower feed-to-gain ratios.However,in production,the proportion of polyunsaturated fatty acids in beef from stall-fed yaks is lower,and the meat quality is inferior to that of grazed yaks.For this study,28 healthy male yaks of similar age and body weight were selected and randomly divided into four groups,each consisting of seven yaks.One group was managed through complete grazing(FM),while the remaining three groups were entirely stall-fed,each provided with different diets:a standard complete feed group(BS),a complete feed group supplemented with 2%extruded flaxseed(YM),and a complete feed group supplemented with 2%Schizochytrium powder(LZ).The results indicated that the daily weight gain of yaks in the stall-fed groups was significantly higher than that of the grazed yaks(P<0.05).Although there was no significant difference in daily weight gain between the extruded flaxseed group(YM)and the Schizochytrium group(LZ)compared to the standard diet group(BS),their average daily feed intake and feed-to-gain ratios were significantly lower than that of the BS group(P<0.05).Additionally,the cooked meat yield of the YM and LZ groups was significantly lower than that of the FM and BS groups(P<0.05).Notably,the muscle brightness and yellowness of the YM and LZ groups were signifi-cantly higher compared to the other two groups.The intramuscular fat content in the YM group was significantly higher than that of the other groups,while the intramuscular fat content in the LZ group was notably greater than that in the BS group.This indicates that the addition of puffed flaxseed and Schizochytrium powder can significantly enhance the quality of yak meat.
万方数据
维普
