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http://dx.doi.org/10.5536/KJPS.2012.39.3.207

The Effects of Dietary Protein Level on Laying Performance and Egg Quality in Japanese Quail  

Oh, Sung-Taek (College of Animal Bioscience and Technology, Konkuk University)
Kim, Je-Hun (College of Animal Bioscience and Technology, Konkuk University)
Park, Seung-Jae (College of Animal Bioscience and Technology, Konkuk University)
Yun, Jeong-Geun (College of Animal Bioscience and Technology, Konkuk University)
Zheng, Lan (College of Animal Bioscience and Technology, Konkuk University)
An, Byoung-Ki (College of Animal Bioscience and Technology, Konkuk University)
Kang, Chang-Won (College of Animal Bioscience and Technology, Konkuk University)
Publication Information
Korean Journal of Poultry Science / v.39, no.3, 2012 , pp. 207-213 More about this Journal
Abstract
This experiment was conducted to investigate the effects of various levels of dietary protein on laying performance and egg quality in laying quail. A total of six hundred forty 7-week-old laying type Japanese quail were divided into four groups with eight replicates per group (20 birds per replicate) and fed four diets differing in dietary protein levels (18, 20, 22 and 24%) with isocaloric corn-soybean meal-based diets for 8 weeks. The results showed no significant differences in feed intake and egg weight among the groups. With an increase in dietary protein levels, the egg production and daily egg mass were linearly increased (P<0.05). However, there were no significant differences in eggshell thickness and Haugh unit. The dietary protein did not affect the blood levels of GOT, GPT, BUN, albumin, and creatinine. The ammonia concentration of intestinal digesta was not affected by the dietary treatments. The contents of hepatic triacylglycerol in the groups fed diets containing 20% protein or more were significantly reduced as compared with that of 18% CP group (P<0.05). Overall, this study showed that relatively high levels of dietary CP are needed to sustain the higher egg production and daily egg mass and to avoid the hepatic triacylglycerol accumulation in Japanese quail.
Keywords
protein level; laying performance; egg quality; Japanese quail;
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