Effects of different feeding patterns on performance,slaughtering performance,and content of smelly fatty acids in muscle and adipose tissue of guizhou black goats
In order to investigate the effects of feeding pattern on production performance,slaughter performance,meat quality and content of funky fatty acids of Guizhou black goats,42 3-month-old Guizhou black goat lambs with an average body weight of(12.68±1.32)kg were selected and divided into grazing group and house feeding group by complete random block design(RCBD).21 goats in each group were divided into 3 replicates and 7 goats in each replicate.The feeding experiment was carried out according to the grazing mode and the housing feeding mode.The pre-test period was 7d and the formal period was 120d.The results showed that the body weight,average daily gain,body length,body height and chest circumference of Guizhou black goats in grazing group were lower than those in house feeding group.The slaughter performance(live weight before slaughter,carcass weight,carcass net meat percentage,carcass net meat weight,slaughter percentage and meat percentage)of the house feeding group were higher than those of the grazing group.The shear force of the house feeding group was lower than that of the grazing group,and the cooked meat rate and drip loss were higher than those of the grazing group,but there was no significant difference in pH value.The contents of 4-methyloctanoic acid(MOA),4-ethyloctanoic acid(EOA)and 4-methylnonanoic acid(MNA)in muscle and adipose tissue of grazing group were lower than those of the fed group on the whole,but the contents of MNA in subcutaneous adipose tissue were higher than those of the fed group.The above results showed that house feeding could significantly improve the production performance and slaughter performance of Guizhou black goats,but grazing could reduce the content of funky fatty acids to a certain extent,which played a certain role in reducing the mutton smell of Guizhou black goats.
guizhou black goatproduction performanceslaughter performancemeat qualitymutton smellfatty acid
万方数据
维普
