Comparative Study on Fattening Performance,Slaughter Performance and Meat Quality of Black Goats and Their Hybrid Offspring
[Objective]Under the same fermented total mixed ration(TMR)fattening conditions,the differences in fattening performance,slaughter performance,meat quality traits and nutrient apparent digestibility of Black goats and their hybrid offspring were comparatively analysed,so as to provide some data support for the evaluation of crossbreeding effect between Guizhou Black goats and Black Nubian goats,as well as the research on the fattening efficiency of hybrid new lines.[Method]A total of 15 healthy Guizhou Black goats,Black Nubian goats,and their hybrid F1 generation goats(Guizhou Black goats♀×Black Nubian goats ♂)were selected from 7 to 8 months of age in the fattening experiment.The experiment lasted for 90 days,including 10 days of pre-test and 80 days of trial.During the experiment,body weight at 10 d intervals,body size index at the beginning and end of the test and apparent digestibility of nutrients at the end of the test were measured.At the end of the fattening period,three goats from each breed/line were selected for slaughtering to determine the slaughter performance,and the biceps femoris muscle of the hind limb and triceps brachii muscle of the fore limb were also taken for the measurement of meat quality traits.[Result]For hybrid F1 generation goats,the average daily weight gain was significantly higher than that of Guizhou Black goats(P＜0.05),the feed to gain ratio was significantly lower than that of Guizhou Black goats(P＜0.05),and the changes in body weight gain and body size were similar to those of Black Nubian goats(P＞0.05).The apparent digestibility of crude protein,crude fat and neutral detergent fibre were significantly higher than that of Guizhou Black goats(P＜0.05).Carcass weight,net meat weight,net meat ratio,meat-bone ratio and rib thickness(GR value)were significantly higher than that of Guizhou Black goats(P＜0.05),shear force of hind limb biceps femoris and forelimb triceps brachii muscles were significantly lower than that of Guizhou Black goats and Black Nubian goats(P＜0.05),meat L*values were significantly higher than that of Black Nubian goats(P＜0.05),the steaming loss of hind limb biceps femoris was significantly lower than that of Guizhou Black goats and Black Nubian goats(P＜0.05),the steaming loss of forelimb triceps brachii was significantly lower than that of Guizhou Black goats(P＜0.05),and the pH45min of forelimb triceps brachii was significantly higher than that of Guizhou Black goats and Black Nubian goats(P＜0.05).[Conclusion]After crossbreeding with Black Nubian goats,the changes in body weight gain and body size during the fattening period of the F1 generation of Guizhou Black goats were similar to those of the Black Nubian goats,and slaughter performance,meat quality traits,and apparent digestibility were increased and improved to different degrees compared with Guizhou Black goats.
Guizhou Black goatsBlack Nubian goatshybrid F1 generationfattening performanceslaughter performancemeat quality traits
万方数据
维普
