Received: 18-11-2021 / Accepted: 01-03-2022
Egg production is an important economic trait in poultry production in general and egg-laying hens in particular. Prediction of eggs performance at early stage could improve livestock efficiency by setting up a early production plan. This study was conducted to describe the egg production rate and determine the best models to estimate egg production at the peak of egg-laying of D310 chickens raised at experimental farm, Faculty of Animal Science of Vietnam National University of Agriculture from December 2020 to May 2021. Five functional nonlinear models (Logistic, Compartmental I, McNally, Compartmental II and Yang) were used to estimate egg production rate at the peak of egg-laying from 19 to 49 weeks of age. Egg production rate was collected from 360 hens from 19 weeks of age (fisrt egglaying week) to 49 weeks of age (26 weeks of egglaying period). The egg production rate at the peak of egg-laying (a) estimated by Logistic model was 0.839. The mean egg production week at egg production peak estimated by Logistic model was 5.265 eggs. The Logistic function appeared most appropriate to describe egg production rate of D310 chickens with the highest coefficient of determination (99.58 %) and the lowest values of AIC (-1862,53) and BIC (-1843,82).