Effects of low protein amino acid balanced diet on production performance,egg quality,serum index,and nitrogen emission of Longyan laying ducks
The purpose of the experiment was to study the effects of a low protein and amino acid balanced diet on the production performance,egg quality,blood indexes,and fecal nitrogen content of Longyan laying ducks at the peak laying period.540 healthy laying ducks aged 140 days were randomly divided into three groups.The control group was fed with a 17.31％crude protein diet,and the experimental group 1 and experimental group 2 were fed with 16.20％and 15.30％crude protein balanced amino acid diets,respectively.The formal trial period was 98 days.The results showed that compared with the control group and experimental group 2,the yolk weight and egg weight of the experimental group 1 were significantly increased(P＜0.05).The activity of serum SOD in the experimental group 2 was significantly higher than that in the other two groups(P＜0.05),and the content of BUN in the experimental group 2 was significantly higher than that in the experimental group 1(P＜0.05).The apparent digestibility of dry matter and crude fiber in experimental group 2 and control group was significantly higher than that in the experimental group 1(P＜0.05).With the decrease in crude protein level,the apparent digestibility of crude protein was significantly increased(P＜0.05),and fecal nitrogen content was significantly decreased(P＜0.05).The study indicates that when the dietary crude protein level is 17.31％,reducing the crude protein level to 1.0％to 2.5％and balancing essential amino acids has no negative effects on production performance,egg quality,serum biochemical and antioxidant indexes,and can reduce the fecal nitrogen content of laying ducks.
Longyan laying ducklow protein amino acid balanced dietegg qualityantioxidationnitrogen emissions
万方数据
维普
