Effects of Dietary Crude Protein and Metabolizable Energy Levels on Performance and Nitrogen Balance of Sichuan White Geese Aged from 9 to 10 Weeks

LI Qin; CHEN Mingjun; PENG Xiangwei

doi:10.3969/j.issn.1006-267x.2015.01.011

2015 , Vol. 27 >Issue 1: 76 - 84

DOI: https://doi.org/10.3969/j.issn.1006-267x.2015.01.011

Poultry Nutrition

Effects of Dietary Crude Protein and Metabolizable Energy Levels on Performance and Nitrogen Balance of Sichuan White Geese Aged from 9 to 10 Weeks

LI Qin ,
CHEN Mingjun ,
PENG Xiangwei

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Chongqing Academy of Animal Science, Chongqing 402460, China

Received date: 2014-07-02

Online published: 2015-01-10

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Abstract

This experiment was conducted to study the effects of crude protein (CP) and metabolizable energy (ME) levels on performance and nitrogen balance of Sichuan white geese aged from 9 to 10 weeks. Four hundred and thirty two 57-day-old healthy Sichuan white geese with similar body weight were used in a 3×3 double factorial design trial and randomly allocated into 9 groups with 4 replicates in each group and 12 geese in each replicate. The geese were fed 9 experimental diets with three levels of ME (12.86, 12.13 and 11.43 MJ/kg) and three levels of CP (15%, 13% or 11%). The feeding experiment lasted for 14 days. Eight geese per group were picked up on the basis of individual weight immediate to the average weight of every group on day 8 of the experiment, and the geese were used in a metabolism trial. The results showed as follows: 1) CP level had significant effects on daily dry matter (DM) intake and feed to gain ratio (P<0.05), the daily DM intake and feed to gain ratio were decreased with CP level increased; ME level had significant effect on daily DM intake (P<0.01), the daily DM intake was decreased with ME level increased; the interaction between CP and ME levels had significant effect on the consumed CP and ME for gain per gram (P<0.05 or P<0.01), with CP level increased, the consumed CP for gain per gram was increased, the consumed ME for gain per gram was decreased. 2) CP level had significant effects on nitrogen intake, nitrogen excretion from excrement, deposited nitrogen, GE excretion from excrement and availability of GE (P<0.05 or P<0.01), the nitrogen intake, nitrogen excretion from excrement, deposited nitrogen, GE excretion from excrement were increased with CP level increased. The interaction between dietary CP and ME levels had significant effects on deposited nitrogen and availability of nitrogen (P<0.05). The results suggest that for Sichuan white geese aged from 9 to 10 weeks, the suitable dietary levels of CP and ME are 13% and 11.43 MJ/kg, respectively.

Key words： Sichuan white geese; crude protein; metabolizable energy; nitrogen balance; performance

Cite this article

LI Qin , CHEN Mingjun , PENG Xiangwei . Effects of Dietary Crude Protein and Metabolizable Energy Levels on Performance and Nitrogen Balance of Sichuan White Geese Aged from 9 to 10 Weeks[J]. Chinese Journal of Animal Nutrition, 2015 , 27(1) : 76 -84 . DOI: 10.3969/j.issn.1006-267x.2015.01.011

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