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Changes of Blood $Mg^{2+}$ and $K^+$ after Starvation during Molting in Laying Hens  

Go, Hyeon-Kyu (College of Veterinary Medicine, Chonbuk National University)
Lee, Sei-Jin (Korea Basic Science Institute Jeonju Center)
Cho, In-Gook (College of Veterinary Medicine, Chonbuk National University)
Lee, Mun-Young (College of Veterinary Medicine, Chonbuk National University)
Park, Hye-Min (College of Veterinary Medicine, Chonbuk National University)
Mun, A-Reum (College of Veterinary Medicine, Chonbuk National University)
Kim, Jeong-Gon (College of Veterinary Medicine, Chonbuk National University)
Kim, Gi-Beum (Korean Zoonoses Research Institute, Chonbuk National University)
Kim, Jin-Shang (Korean Zoonoses Research Institute, Chonbuk National University)
Kang, Hyung-Sub (Korean Zoonoses Research Institute, Chonbuk National University)
Kim, Shang-Jin (Korean Zoonoses Research Institute, Chonbuk National University)
Publication Information
Journal of Veterinary Clinics / v.28, no.6, 2011 , pp. 581-585 More about this Journal
Abstract
Either the fasting during natural molting or the starvation in induced molting would be a severe metabolic stress to laying hens. The metabolic stress during starvation and subsequent refeeding syndrome could lead to unbalance of mineral homeostasis, including $Mg^{2+}$, $K^+$ and P required by ATP synthesis. Since $Mg^{2+}$ is a fundamental ion for normal metabolic processes and stress may not only increase in demands of $Mg^{2+}$ but also produce consequence of $Mg^{2+}$ deficiency, we investigated the changes of blood ionized and total ions related to starvation during molting in laying hens. We founded the significant decrease in blood $Mg^{2+}$ and $K^+$ accompanied by the changes of biochemical parameters relating to increased metabolic stress after molting. These results suggested that appropriate $Mg^{2+}$ and $K^+$ supplements to laying hens could have beneficial effects during molting and subsequent refeeding that could produce a severe hypomagnesemia and hypokalcemia.
Keywords
laying hen; molting; starvation; hypermagnesemia; hypokalcemia;
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