Abstract
Simple SummaryThe transparency of pigeon egg albumen is a special phenotypic trait that different from other poultry eggs, and calcium is one of the main factors. This experiment aimed to study the effects of added dietary Ca on production performance, egg quality, and albumen transparency. It will guide producers on how to feed their laying pigeons and provide a scientific basis for special feed research and the development of laying pigeons with transparent eggs.In order to confirm the dietary calcium (Ca) requirement to keep a balance of the production performance and the albumen transparency, the study examined the effects of different dietary Ca levels on the production performance, egg quality, and albumen transparency of laying pigeons. 1080 pigeon pairs were randomly allocated into six treatment groups, each consisting of six replicates of 30 pigeon pairs per treatment. Ca levels of 0.60, 0.90, 1.20, 1.80, 2.40, and 3.00% were fed. The results showed that the laying rate, average egg weight, and feed to egg ratio were significantly influenced by Ca levels (p < 0.05). Albumen percentage, albumen height, Haugh unit, and eggshell thickness at 8 w and 16 w were significantly influenced by Ca levels (p < 0.05). The L*, a*, b*, and c* values of cooked albumen at 8 w and 16 w were all significantly influenced by Ca levels (p < 0.05). After 16 w of feeding different Ca levels, the percentage of transparent eggs had an early increasing and later decreasing trend. In conclusion, taking the transparency of pigeon eggs as an assessment index and considering production performance secondly, the optimal level of dietary Ca for laying White King pigeons is 0.90%.
Highlights
Pigeon eggs are praised as “animal ginseng” due to their many ingredients with high nutritional value such as protein, lecithin, vitamins and iron
Ca is an important nutritional indicator laying fowl plays a vital role in poultry and performance
Castillo et al reported that the optimum consumption rate of 110 g/bird per day [7]
Summary
Pigeon eggs are praised as “animal ginseng” due to their many ingredients with high nutritional value such as protein, lecithin, vitamins and iron. They are a safe and healthy food source and can be a medicated diet for all ages [1,2]. The appearance of cooked pigeon eggs has become the main factor affecting human consumption. They are different from other poultry eggs because the transparency of their albumen is a special phenotypic trait of pigeon eggs. Many reports exist concerning conventional pigeon egg quality [3], nutritional ingredients [4], and antioxidant capabilities [5]; there are few reports concerning the albumen transparency of pigeon eggs
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