Effects of Different Feed Restriction Methods on Growth Performance, Slaughter Performance and Skeletal Traits of Arbor Acres Chickens

YANG Suliang, LI Min, XIA Mengfang, SHANG Yanhong, CHEN Yu, LU Binglong, HUANG Yanqun, CHEN Wen

doi:10.3969/j.issn.1006-267x.2017.09.039

2017 , Vol. 29 >Issue 9: 3341 - 3351

DOI: https://doi.org/10.3969/j.issn.1006-267x.2017.09.039

Molecular Nutrition

Effects of Different Feed Restriction Methods on Growth Performance, Slaughter Performance and Skeletal Traits of Arbor Acres Chickens

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Henan Agricultural University Feed Nutrition Engineering Laboratory of Henan Province, Henan Agricultural University National Germplasm Resources Platform for Animals, Zhengzhou 450002, China

Received date: 2017-02-17

Online published: 2017-09-08

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Abstract

This experiment was conducted to study the effects of different feed restriction methods on growth performance, slaughter performance and skeletal traits of Arbor Acres (AA) chickens. Eighty 7-day-old AA chickens were fed in our experiment. The chickens were randomly assigned to 4 groups:control group, feed intake restriction group, energy restriction group and protein restriction group, with 20 replicates per group. Eight chickens of each group were selected to slaughter after feed restriction for 14 days (21-day-old) and compensatory growth (after the feed restriction) for 21 days (42-day-old), respectively. The chest muscle weight, leg muscle weight, abdominal fat weight, heart weight, liver weight, spleen weight, thymus weight, bursal weight, leg bone weight, and the length and diameter of the tibia and femur were measured, respectively. The results showed as follows:1) after feed restriction, the average daily gain of chickens of three restriction groups was significantly lower than that of control group (P<0.05). After compensatory growth, the average daily feed intake, average daily gain and feed to gain ratio had no significant difference among all group (P>0.05), however, the final weight of feed intake restriction group was significantly lower than that of control group (P<0.05). 2) After feed restriction, the eviscerated ratio, semi-eviscerated, breast muscle ratio, leg muscle ratio and abdominal fat ratio of chickens of feed intake restriction group were significantly lower than those of control group (P<0.05), the abdominal fat ratio of chickens of feed intake restriction group and energy restriction group was significantly lower than that of protein restriction group and control group (P<0.05). After compensatory growth, there were no significant differences on breast muscle ratio and leg muscle ratio of chickens among all group (P>0.05), however, the ratio of abdominal fat of feed restriction group was significantly higher than that in the control group (P<0.05). 3) After feed restriction, the liver index of chickens of protein restriction group was significantly higher than that of other three groups (P<0.05), the pancreas index of chickens of feed intake restriction group was significantly higher than that of other three groups (P<0.05), the spleen index of chickens of control group was significantly higher than that of other three groups (P<0.05). After compensatory growth, there were no significant differences on heart index, liver index, pancreas index, spleen index, thymus index and bursal of Fabricii index of chickens among all group (P>0.05). 4) After feed restriction, the tibia weight, tibia length, tibia diameter, femur weight and femur length of chickens of feed intake restriction group were significantly lower than those of other three groups (P<0.05), the femur diameter of chickens of feed intake restriction group and energy restriction group was significantly lower than that of control group and protein restriction group (P<0.05). After compensatory growth, there were no significant differences on tibia weight, tibia length, tibia diameter, femur weight, femur length and femur diameter of chickens among all group (P>0.05). In conclusion, the average daily gain and partial skeletal trait indexes on AA chicken are reduced by three feed restriction methods, and the feed intake restriction group has a greatest influence on average daily gain and skeletal traits of chickens. After 21 days of compensatory growth, the three restriction groups exhibit compensatory growth effects, there are no significant differences on skeletal traits among three restriction groups and control group. However, the average daily gain and final weight are decreased by feed intake restriction method, we suggest that the feed intake restriction method should be used prudently in the actual production.

Key words： feed intake restriction; energy restriction; protein restriction; chickens; compensatory growth; skeletal traits

Cite this article

YANG Suliang, LI Min, XIA Mengfang, SHANG Yanhong, CHEN Yu, LU Binglong, HUANG Yanqun, CHEN Wen . Effects of Different Feed Restriction Methods on Growth Performance, Slaughter Performance and Skeletal Traits of Arbor Acres Chickens[J]. Chinese Journal of Animal Nutrition, 2017 , 29(9) : 3341 -3351 . DOI: 10.3969/j.issn.1006-267x.2017.09.039

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