Changes in egg quality traits during the last phase of production: is there potential for an extended laying cycle?
Changes in egg quality traits during the last phase of production: is there potential for an extended laying cycle?
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DOI：
10.1080/00071668.2016.1209738
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发表时间：
2016-12-01
影响因子：
2
通讯作者：
Delezie, E.
中科院分区：
文献类型：
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作者：
Molnar, A.;Maertens, L.;Delezie, E.
1.通过田间试验，研究了蛋壳品质在产蛋期结束时的劣化情况，探讨了延长生产周期的可能性。对来自比利时商业农场的1200个鸡蛋进行了评估：在57-65周龄和生产周期结束时(74-92周)在收集带上随机抽样。基于线性混合模型，估计了60周龄平均蛋鸡的蛋质量，并预测了品质性状的变化，直到产蛋周期结束。从60周龄开始，蛋重每周增加0.07g，蛋形指数每周减少0.04个单位(P
1. A field study was conducted to investigate the deterioration of eggshell quality at the end of lay and examine the potential to extend the production cycle. A total of 1200 eggs were assessed originating from commercial farms in Belgium: eggs were random sampled at the collection belt at 57-65 weeks of age and at the end of the production cycle (74-92 weeks).2. Based on a linear mixed model, egg quality was estimated for an average flock at 60 weeks of age and changes in quality traits were predicted until the end of the laying cycle.3. Egg weight increased by 0.07g every week from 60 weeks of age onwards and shape index decreased by 0.04 unit weekly (P