饲养方式对黔北麻羊生产性能、肉质、 免疫和抗氧化性能的影响.

The objective of this study was to systematically assess the changes of production performance, meat quality, immune and antioxidant properties of Qianbei Ma goat under different feeding method, so as to provide scientific support for high-yield, high-quality and healthy mutton production. Twenty six healthy Qianbei Ma goat rams with similar body weight [(19.68±1.60) kg] were randomly and averagely divided into grazing and stallfeeding groups. The grazing group was fed with traditional grazing, and the stall-feeding group was fed with full price pellet feed. The pre test period was 10 days, and the trial period was 180 days. After the test, three goat in each group were slaughtered to compare the production performance, meat quality, immunity and antioxidant performance of the two groups. The results showed that: ① in terms of production performance, compared with the grazing group, the stall-feeding group had better production performance in terms of final body weight, average daily gain, carcass weight, slaughter rate, net meat weight, meat to bone ratio, shearing force, cooked meat rate, but the skin was thinner, loin eye area was smaller, bone was lighter, pH was higher, with a significant difference in meat to bone ratio (P<0.05). ② In terms of meat nutrient composition, the contents of glycine, tyrosine and proline in the 16 kinds of amino acids in the stall-feeding and grazing groups were significantly different (P<0.05), while the contents of other 13 kinds of amino acids and total amino acids had no significant difference; The contents of protein, fat and cholesterol in the grazing group were higher than those in the stall-feeding group, but there was no difference between the two groups. ③ In terms of immune and antioxidant properties, immune indicators of the stall-feeding group γ interferon was higher than that in grazing group (P<0.05), lysozyme was lower than that in grazing group (P<0.05), and there was no significant difference between MDA and four antioxidant indexes (P>0.05). In conclusion, the meat carrying capacity of Qianbei Ma goat is stronger in stall-feeding than in grazing. The feeding regimens has a small impact on meat quality and antioxidant performance. However, the immune regulation ability of grazing feeding is better, and it is suggested that a suitable indoor (outside) sports field should be equipped in stall-feeding, which can improve the meat production capacity while protecting the immunity and health of the goat. [ABSTRACT FROM AUTHOR]