Poultry Nutrition

Effects of Dietary Crude Protein and Metabolizable Energy Levels on Performance and Nitrogen Balance of Sichuan White Geese Aged from 4 to 8 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

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 4 to 8 weeks. Five hundred and forty healthy 22-day-old China 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 15 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 (17%, 15% and 13%). The feeding experiment lasted for 35 days. Eight geese per group were picked up on the basis of individual weight immediate to the average weight of every group on day 21 of the experiment, and the geese were used in a metabolism experiment. The results showed as follows: 1) CP level had a significant effect on feed to gain ratio (P<0.05), ME level had significant effects on daily dry matter (DM) intake and feed to gain ratio (P<0.01), the interaction between CP and ME levels had a significant effect on daily DM intake (P<0.01). With CP level increasing, the consumed CP for gain per gram was significantly increased (P<0.01), the consumed ME for gain per gram was firstly decreased and then increased (P<0.01). 2) CP level had significant effects on nitrogen intake, nitrogen excretion from excrement, availability of nitrogen and availability of GE (P<0.01), ME level had significant effects on nitrogen excretion from excrement, availability of nitrogen, GE excretion from excrement and availability of GE (P<0.05 or P<0.01), the interaction between CP and ME levels had significant effects on nitrogen intake, GE intake, GE excretion from excrement and ME (P<0.05 or P<0.01). The results suggest that for Sichuan white geese aged from 4 to 8 weeks, the suitable dietary levels of CP and ME are 15% and 12.13 MJ/kg, respectively.

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 4 to 8 Weeks[J]. Chinese Journal of Animal Nutrition, 2015 , 27(1) : 67 -75 . DOI: 10.3969/j.issn.1006-267x.2015.01.010

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