Effects of Manganese on Growth Performance, Slaughter Performance, Nutrient Availability and Enzyme Activity of Wulong Geese Aged from 5 to 16 Weeks

ZHANG Xuejun; WANG Baowei; GE Wenhua; ZHANG Ming; YUE Bin; SHI Xueping; XU Chenchen; WANG Xin

doi:10.3969/j.issn.1006-267x.2014.01.015

2014 , Vol. 26 >Issue 1: 106 - 114

DOI: https://doi.org/10.3969/j.issn.1006-267x.2014.01.015

Poultry Nutrition

Effects of Manganese on Growth Performance, Slaughter Performance, Nutrient Availability and Enzyme Activity of Wulong Geese Aged from 5 to 16 Weeks

ZHANG Xuejun ,
WANG Baowei ,
GE Wenhua ,
ZHANG Ming ,
YUE Bin ,
SHI Xueping ,
XU Chenchen ,
WANG Xin

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Institute of High Quality Waterfowl, Qingdao Agricultural University, Qingdao 266109, China

Received date: 2013-07-15

Online published: 2013-12-24

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Abstract

This experiment was conducted to study the effects of manganese on growth performance, slaughter performance, nutrient availability and enzyme activity of Wulong geese aged from 5 to 16 weeks, and to find the appropriate supplemental level of manganese. A total of 360 Wulong geese with similar average body weight were randomly divided into 6 groups with 6 replicates per group and 10 geese (half male and half female) per replicate. Geese in the groups were fed the basal diet (manganese content 20 mg/kg) supplemented with 0 (group Ⅰ), 30 (group Ⅱ), 60 (group Ⅲ), 90 (group Ⅳ), 120 (group Ⅴ) and 150 mg/kg (group Ⅵ) manganese, respectively. The experiment lasted for 12 weeks. The results showed as follows: 1) using unrelated comparative analysis method, when the dietary manganese level was 104.90 mg/kg, the average daily gain reached the highest; when the dietary manganese level was 117.63 mg/kg, the feed to gain reached the lowest. 2) The dressed percentage, percentage of half-eviscerated yield, percentage of eviscerated yield and percentage of leg muscle in groups Ⅳ and Ⅴ were significantly higher than those in group Ⅰ (P<0.05 and P<0.01, respectively), the percentage of abdominal fat in group Ⅴ was significantly lower than that in group Ⅰ (P<0.05). 3) The availability of crude protein, ether extract, calcium, phosphorus, crude fiber in groups Ⅳ and Ⅴ was significantly higher than that in group Ⅰ (P<0.05 or P<0.01), the availability of neutral detergent fiber and acid detergent fiber, apparent metabolizable energy and true metabolizable energy in group Ⅴ were significantly higher than those in group Ⅰ (P<0.05). 4) The manganese superoxide dismutase (MnSOD) activity in group Ⅴ was significantly higher than that in group Ⅰ (P<0.01), and the malic dehydrogenase (MDH) and lipoproteinesterase (LPL) activities in groups Ⅳ andⅤ were significantly lower than those in group Ⅰ (P<0.05 or P<0.01). 5) MnSOD, MDH and LPL activities had significant correlation with the growth performance (P<0.01), MDH and LPL activities had significant correlation with the nutrient availability (P<0.01). In conclusion, dietary manganese at appropriate supplemental level can promote growth performance, slaughter performance and nutrient availability of Wulong geese aged from 5 to 16 weeks, but decrease the percentage of abdominal fat, and the optimal supplemental level of manganese is 104.90 to 117.63 mg/kg. MDH and LPL activities have significant correlation with the growth performance and nutrient availability.

Key words： manganese; geese; growth performance; slaughter performance; nutrient availability; enzyme activity; appropriate supplemental level

Cite this article

ZHANG Xuejun , WANG Baowei , GE Wenhua , ZHANG Ming , YUE Bin , SHI Xueping , XU Chenchen , WANG Xin . Effects of Manganese on Growth Performance, Slaughter Performance, Nutrient Availability and Enzyme Activity of Wulong Geese Aged from 5 to 16 Weeks[J]. Chinese Journal of Animal Nutrition, 2014 , 26(1) : 106 -114 . DOI: 10.3969/j.issn.1006-267x.2014.01.015

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