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http://dx.doi.org/10.5851/kosfa.2008.28.5.610

Effects of Feeding Rhus verniciflua Extract on Egg Quality and Performance of Laying Hens  

Kang, Hwan-Ku (Poultry Science Division, Livestock Resource Development, National Institute of Animal Science, RDA)
Kang, Geun-Ho (Poultry Science Division, Livestock Resource Development, National Institute of Animal Science, RDA)
Na, Jae-Cheon (Poultry Science Division, Livestock Resource Development, National Institute of Animal Science, RDA)
Yu, Dong-Jo (Poultry Science Division, Livestock Resource Development, National Institute of Animal Science, RDA)
Kim, Dong-Wook (Poultry Science Division, Livestock Resource Development, National Institute of Animal Science, RDA)
Lee, Sang-Jin (Poultry Science Division, Livestock Resource Development, National Institute of Animal Science, RDA)
Kim, Sang-Ho (Poultry Science Division, Livestock Resource Development, National Institute of Animal Science, RDA)
Publication Information
Food Science of Animal Resources / v.28, no.5, 2008 , pp. 610-615 More about this Journal
Abstract
This experiment was conducted to investigate the effects of drinking of Rhus tree-extract on laying performance and egg quality in hens. Four hundred eighty, 55-wk-old ISA brown, laying hens were divided into six groups, control, Rhus tree-extract 500 ppm, 1,000 ppm, 2,000 ppm, 3,000 ppm and 5,000 ppm. The hens were fed a supplemented drink containing Rhus tree-extract for 12 weeks. Egg production and egg mass increased by drinking Rhus tree-extract (p<0.05) and the feed conversion ratio also improved in Rhus tree-extract groups. Cecal numbers of Lactobacillus spp., E. coli and Salmonella were not different in treatments. Availability of protein and ash improved in the Rhus extract groups. The eggshell breaking strength and egg shell thickness were significantly increased in Rhus tree-extract 3,000 ppm and Rhus tree-extract 2,000 ppm groups compared to the other groups. Also, egg yolk color and Haugh unit were significantly improved by the dietary Rhus tree-extract (p<0.05).
Keywords
Rhus tree-extract; hens; egg quality; Haugh unit;
Citations & Related Records
Times Cited By KSCI : 8  (Citation Analysis)
Times Cited By Web Of Science : 2  (Related Records In Web of Science)
Times Cited By SCOPUS : 3
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