Effects of chitosan coating and different storage periods of broiler breeder eggs on growth performance and carcass characteristics

ABSTRACT This study was carried out to determine the effects of coating with chitosan film and storing at different periods (7, 14, and 21 days) of broiler breeder eggs on growth performance and carcass characteristics of the chicks. The present study was arranged as three different storage periods (7, 14, and 21 days) and coating or not the eggs with chitosan film. In total, 1800 hatching fertilized eggs were used. These eggs were divided into six groups with 100 eggs in each and 600 eggs in each replication. A total of 751 chicks obtained from the hatching were used as material in this study. As a result, all chicks in the coated chitosan groups were alive during the 42-day growth period. The average hatching weight was determined as 42.7±0.1 g. The mean body weight (BW) of chicks on the 42nd day was determined as 2541.8±12.3 g in all groups. The effect of repetition on weekly BW and body weight gain (BWG) was found to be significant in the growth period. The differences between the groups for the BW were significant on day 1. While the weekly BWG varied, the growth performance was similar in the growth period in all groups. The differences between the groups in terms of slaughter weight and carcass characteristics were insignificant. It was determined that coating broiler eggs with chitosan and storing them in different periods does not have significantly negative effect on growth performance and carcass characteristics.

摘要：本研究旨在探究壳聚糖（chitosan）膜包被处理及肉种鸡种蛋的不同储存时长（7、14、21天）对其所孵雏鸡的生长性能与胴体性状的影响。
本试验设置3个不同储存周期（7、14、21天），并设置壳聚糖膜包被与未包被两个处理组，共计使用1800枚受精种蛋。受试蛋被分为6组，每组100枚，每重复组含600枚蛋。本研究以孵化获得的751羽雏鸡为试验材料。
结果显示，壳聚糖包被组的所有雏鸡在42天饲养周期内均存活。试验测得平均孵化重为42.7±0.1 g；所有组雏鸡第42天的平均体重（BW）为2541.8±12.3 g。生长周期内，试验重复对雏鸡周均体重与增重（BWG）的影响显著；各组雏鸡在第1日的体重差异具有统计学意义。尽管周均增重存在波动，但所有组的整体生长性能在整个生长周期内无显著差异。各组间屠宰体重与胴体性状的差异均无统计学意义。
本研究结果表明，对肉种鸡种蛋采用壳聚糖包被并进行不同时长储存，不会对雏鸡的生长性能与胴体性状产生显著负面影响。