Effects of early growth rate and fat soluble vitamins on glucose tolerance, feed transit time, certain liver and pancreas-related parameters, and their share in intra-flock variation in performance indices in broiler chicken

被引：4

作者：

Azadinia, Borzou ^{[1
]}

Khosravinia, Heshmatollah ^{[1
]}

Masouri, Babak ^{[1
]}

Kavan, Bahman Parizadian ^{[1
]}

机构：

[1] Lorestan Univ, Fac Agr, Dept Anim Sci, Khorramabad 6813717133, Lorestan, Iran

来源：

POULTRY SCIENCE | 2022年 / 101卷 / 05期

关键词：

broiler chicken; glucose tolerance; feed transit time; intra-flock variability; performance; BODY-WEIGHT; STARCH; DIGESTIBILITY; UNIFORMITY; IMPACT; YIELD; DIETS;

D O I：

10.1016/j.psj.2022.101783

中图分类号：

S8 [畜牧、动物医学、狩猎、蚕、蜂];

学科分类号：

0905 ;

摘要：

Three hundred fifty 18-day-old Ross 308 male chicks were used to examine the effects of early growth rate ((x) over bar -3SD, (x) over bar -2SD, (x) over bar -SD, (x) over bar, (x) over bar +SD, (x) over bar +2SD and (x) over bar +3SD) and a fat soluble vitamin (FSV) cocktail on glucose tolerance, whole tract feed transit time (FFT), certain liver, and pancreas related traits as well as their share in intra-flock variance of body weight (BW) at d 42 and feed intake (FI) and feed conversion ratio (FCR) in d 21 to 42 of age. Birds with a greater initial BW (21 d) showed greater FI during d 21 to 42 of age and gained a higher final BW at d 42 of age. The broilers injected with a FSV cocktail consumed more feed with an improved FCR and achieved a noticeable greater BW at d 42 of age compared with the untreated birds (P < 0.05). Blood glucose at 15 min after oral gavageing of a glucose solution was elevated in all birds faster than those with a body weight close to the mean population BW. Lipase activity increased by 9.75% and amylase activity decreased by 14.9% in the birds treated with FSV injections compared with those received no vitamin. Multivariate step-wise regression analysis showed liver percentage as the leading variable accounting for about 75 and 62.77% of BW and FI variance, respectively. Serum cholesterol concentration was the major predictor in a poor model (R-2 = 52.07) generated for FCR, explaining 29.3 of the FCR viability (P < 0.150). It was concluded that the slow and fast growing birds within a flock showed the same efficiency in dietary glucose absorbing and blood glucose clearing. The faster-growing birds demonstrated slower FTT. Liver percentage was the major parameter explaining a significant fraction of the intra-flock variance in BW at marketing age and FI during days 21 to 42 d.

引用

页数：8