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Preparation of Functional Egg Yolk Powder and Effect on Growth Performance of Piglets

Author: XieYanYan
Tutor: ZengLiLi；ChenWanRu
School: Fujian Agriculture and Forestry University
Course: Animal Nutrition and Feed Science
Keywords: Pathogenic E. coli Yolk antibody Functional yolk powder Process optimization Piglets Growth performance
CLC: S828
Type: Master's thesis
Year: 2010
Downloads: 91
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Abstract


Porcine pathogenic E. coli (ETEC) immunized hens, specific egg yolk antibody (egg yolk immunoglobulins IgY), Preparation of Energy yolk powder. Screening explore functional yolk powder preparation and spray drying process parameters on the basis to carry out the functional components of yolk powder characteristics, storage stability as well as its impact studies on mice and piglet growth performance. Get the following main findings: 1.IgY Preparation pig ETEC antigen hens, determination of the first free 40d after collecting the egg in the IgY titers have been more than 1:12800, you can start collecting the eggs in the preparation of functional yolk powder ; subsequently once every 60d and then strengthen immune to the sustainable and efficient price the IgY the eggs. Screening of functional yolk powder spray-drying process parameters IgY egg yolk powder functional potency, the product yield and sensory properties evaluation index, filter out the best functional yolk powder spray drying process parameters. The spray drying temperature should be controlled at the inlet temperature of 140 ° C to 160 ° C, outlet temperature 78 ° C to 83 ° C, in the process should be promptly clean attached to the powder product in the machine drying tower, to ensure the efficient functionality of egg yolk powder price, high production efficiency and low production costs. Functionality yolk powder stability test has been tested and functional yolk powder average moisture content of 1.5%, the the bacterial total number of 156 CFU / g, E. coli CFU / g, in line with GB 2749-2003 egg products and health standards requirements; at 60 ℃ stored in a dry and hot environment 5d potency is not affected; storage 2d deterioration in the hot and humid open environment 4d titers began to decline; been able to maintain its high titer 1 year storage at room temperature confined environment. Functional yolk powder should be stored at room temperature, dry, airtight environment, the shelf life of 1 year. 4. The mice feeding trial the mice feeding trial results showed that, IgY vitro inhibition of ETEC; preparation of functional yolk powder on mice to promote growth and regulate immune function, ETEC induced small rat intestinal infection has a significant preventive and therapeutic effect, the mortality of the test group of mice is 52.3% lower than the control group (P LT; 0.05). 5d after weaning. The piglet feeding experiment election (32 ± 2) Elsie grew up 90 piglets, male female, were randomly divided into three groups, each with three replicates of 10 piglets. The control group was fed the basal diet, group Ⅰ and group Ⅱ were added on the basis of the control diet yolk powder of 0.1% and 0.2% of the functionality of the trial period 28d. The results showed that the average daily weight gain of the test group Ⅰ and group II piglets were significantly higher than that of the control group was 14.4% (P lt; 0.05) and 15.3% (P lt; 0.05); 11.70% increase in average daily feed intake (P gt; 0.05) and 6.86% (P gt; 0.05); feed to gain ratio, respectively, decreased 5.55% (P gt; 0.05) and 6.50% (P gt; 0.05); diarrhea rates were extremely significant with reducing 54.8% (P lt; 0.01 ) and 84.3% (P lt; 0.01), and reduced the total number of piglet mortality and fecal pathogenic E. coli; experimental group II cardiac index increased by 29% (P lt; 0.05) than the control group; no difference in blood biochemical parameters of piglet intestinal villi morphology, but the experimental group increased intestinal villi height; economic benefits of piglets were highly significantly improve 67.76% (P lt; 0.01) and 86.42% (P lt; 0.01) . That functional yolk powder can effectively improve the growth performance, and has a preventive effect on piglets caused by ETEC and digestive diseases, improve the economic and ecological benefits of piglet breeding has broad application prospects.

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