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http://dx.doi.org/10.5536/KJPS.2009.36.4.311

Effect of Dietary Acid Hydrolysates of Cocoon on Performance, Egg Quality, Blood Immune Substance and Serum Cholesterol in Laying Hens  

Yoo, Jong-Sang (Department of Animal Resources ＆Science, Dankook University)
Seok, Ho-Bong (Department of Animal Resources ＆ Science, Dankook University)
Publication Information
Korean Journal of Poultry Science / v.36, no.4, 2009 , pp. 311-316 More about this Journal
Abstract
The study was conducted to evaluate the effects of dietary acid hydrolysates of cocoon on laying performance, egg quality, blood level of immune substance and cholesterol in laying hens. The animals used in the experiment were a total of 240 Hy-Line Brown laying hens (41 weeks old). Dietary treatments included 1) CON (basal diet), 2) SP1 (basal diet + acid hydrolysates of cocoon 0.05%), 3) SP2 (basal diet + acid hydrolysates of cocoon 0.1%) and 4) SP3(basal diet + acid hydrolysates of cocoon 0.2%) twelve laying hens were allotted to a block (pen) with five replicated. Through the whole period of experiment, egg production, egg weight, egg shell breaking strength and egg shell thickness were no significant difference. However, acid hydrolysates of cocoon treatments (SP1, SP2, SP3) significantly increase their egg yolk height and Haugh unit compared to control (P<0.05). IgG and WBC (white blood cell) contents in blood were higher in SP1, SP2, SP3 treatment compared to control (P<0.05). However, albumin and total protein content in blood were no significant difference. Phospholipid, HDL-cholesterol, LDL-cholesterol and total cholesterol contents in serum were higher in SP1, SP2, SP3 treatment compared to control (P<0.05). In conclusion, supplement dietary acid hydrolysates of cocoon improved egg yolk height, Haugh unit, and blood level of phospholipid, HDL-cholesterol, LDL-cholesterol, total cholesterol in laying hen.
Keywords
acid hydrolysates of cocoon; egg quality; immune substance; laying hen;
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Times Cited By KSCI : 3  (Citation Analysis)
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