Effects of energy and protein levels on growth performance,intestinal enzyme activity,and blood indicators of Wanxi white geese during growth and fattening stages
ZHANG Xin
JIANG Xing
ZHANG Kang
HU Qian-qian
YUE Long-yao
REN Man
LI Sheng-he
Abstract：The aim of this experiment was to investigate the appropriate energy and protein levels of Wanxi white geese at fattening stage.A total of 180 one-day-old healthy Wanxi white geese with close body weight were randomly divided into six groups with five replicates per group and six geese per replicate.A 2 × 3 factor design experiment was adopted.Six diets with different energy and protein levels were designed:High metabolizable energy(12.3 MJ/kg),low metabolizable energy(11.8 MJ/kg),high protein(16.3％),medium protein(15.3％),and low protein(14.3％).The experiment lasted for 63 days.The results showed that the daily gain of Wanxi white geese in group D(11.8 MJ/kg,16.3％)at 63 days of age was significantly higher than that in the group A,group C,and group E(P＜0.05),and the ratio of feed to gain was the lowest.The intestinal maltase activity of Wanxi white geese in the group D was the highest,and significantly higher than that in the group A,group B,group E,and group F(P＜0.05).The order of trypsin activity was group D＞group F＞group A＞group C＞group B＞group E.The study indicates that the optimal dietary metabolizable energy and protein levels of Wanxi white geese at fattening stage are 11.8 MJ/kg and 16.3％,respectively.
Keywords：Wanxi white gooseenergy and protein levelsgrowth performanceintestinal enzyme activityblood indicators
Publication Date：2024-05-31
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：7( 48-54 )