Comparison of Effects of Free Range Rearing and Cage Rearing on Visceral Organ Development, Reproductive Characters and Serum Biochemical Indexes of Laying Hens

YANG Haiming; LIU Xue; XIA Jinlong; WANG Zhiyue; CAO Yujuan; ZHU Xiaochun

doi:10.3969/j.issn.1006-267x.2013.06.029

2013 , Vol. 25 >Issue 6: 1353 - 1358

DOI: https://doi.org/10.3969/j.issn.1006-267x.2013.06.029

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Comparison of Effects of Free Range Rearing and Cage Rearing on Visceral Organ Development, Reproductive Characters and Serum Biochemical Indexes of Laying Hens

YANG Haiming ,
LIU Xue ,
XIA Jinlong ,
WANG Zhiyue ,
CAO Yujuan ,
ZHU Xiaochun

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College of Animal Science and Technology, Yangzhou University, Yangzhou 225009, China

Received date: 2012-12-24

Online published: 2013-05-15

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Abstract

This experiment was conducted to investigate the effects of free range rearing and cage rearing on visceral organ development, reproductive characters and serum biochemical indexes of laying hens. One hundred and eighty 25-week-old laying hens were selected and randomly divided into 2 groups with 6 replicates per group and 15 hens per replicate. One of the two groups was put to the ground for free range rearing, and the another group reared in cage unceasingly. The two groups were fed the same diet. On day 42 of the test, four hens per replicate of each group were randomly selected to collect blood samples, and then slaughtered to determine visceral organ development and reproductive character indexes. The results showed as follows: the body weight of free-range birds was significantly lower than that of cage-reared birds (P<0.01). The indexes of gizzard, liver, duodenum, jejunum, ileum and cecum of free-range birds were significantly higher than those of cage-reared birds (P<0.01), and the indexes of stomach and rectum were significantly higher than those of cage-reared birds (P<0.05). The laying rate, oviduct weight and follicle weight of free-range birds were significantly lower than those of cage-reared birds (P<0.01), and oviduct length of free-range birds was significantly lower than that of cage-reared birds (P<0.05). The serum triglyceride concentration of free-range birds was significantly lower than that of cage-reared birds (P<0.05), however, the interleukin-2 concentration of free-range birds emerged a trend of increase (P>0.05). It is concluded that compared with cage rearing, free range rearing can decrease the body weight, increase visceral organ indexes, reduce reproduction performance, and improve the body health in a way.

Key words： laying hen; free range rearing; cage rearing; visceral organ; reproductive characters; serum biochemical indexes

Cite this article

YANG Haiming , LIU Xue , XIA Jinlong , WANG Zhiyue , CAO Yujuan , ZHU Xiaochun . Comparison of Effects of Free Range Rearing and Cage Rearing on Visceral Organ Development, Reproductive Characters and Serum Biochemical Indexes of Laying Hens[J]. Chinese Journal of Animal Nutrition, 2013 , 25(6) : 1353 -1358 . DOI: 10.3969/j.issn.1006-267x.2013.06.029

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