Effects of feed intake on laying performance and serum indexes of Dagu chicken hens
In order to determine the appropriate feed intake of Dagu hens during laying period,ninety 28-week-old hens with similar body weight and laying rate were randomly divided into three groups with three replicates in each group and 10 hens in each replicate.Hens in each group were fed 92(restricted feeding group Ⅰ),115(restricted feeding group Ⅱ)and 138 g/(hens·d)diets(restricted feeding group Ⅲ)respectively.The trial period was three weeks.The results showed that the cumulative weight gain of hens in the restricted feeding group Ⅲ was extremely higher than that in the restricted feeding group Ⅱ(P<0.01),and that in the restricted feeding group Ⅱ was extremely higher than that in the restricted feeding group Ⅰ(P<0.01).There was a significant positive correlation between cumulative weight gain and cumulative feed intake(r=0.706,P=7.427E-15).The regression equation between weight gain and average daily feed intake was established.There was no significant difference in laying rate,egg weight and serum biochemical indexes among hens in each group(P>0.05).The results showed that the average daily feed intake of Dagu chicken hens was 99.65 g,and the metabolizable energy intake was 1.097 MJ/(hens·d),which could keep the body weight stable.The results laid a foundation for determining the suitable nutritional requirements of Dagu chicken hens and improving production and economic benefits.
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