Food or edible material: processes – compositions – and products – Products per se – or processes of preparing or treating... – Plant material is basic ingredient other than extract,...
Reexamination Certificate
1999-03-17
2001-01-16
Sayala, Chhaya D. (Department: 1761)
Food or edible material: processes, compositions, and products
Products per se, or processes of preparing or treating...
Plant material is basic ingredient other than extract,...
C426S630000, C426S807000, C426S053000, C426S054000
Reexamination Certificate
active
06174558
ABSTRACT:
BACKGUOUND OF THE INVENTION
1. Field of the Invention
The invention relates generally to a method for increasing the breast meat yield of poultry and, more specifically, to the use of the enzyme &agr;-galactosidase as a feed supplement to increase the yield of breast meat and decrease the fat deposition in broiler chickens fed a commercial corn/soybean meal diet.
2. Background of the Prior Art
Many grains such as wheat and barley that are typically used as feed ingredients for broiler feed contain up to 10% of a fiber fraction consisting of non-starch carbohydrates. Chickens, like other animals, are not able to digest these non-starch carbohydrates since they lack the digestive enzymes in their digestive systems. Use of exogenously supplied enzymes in wheat and barley based diets is common practice and is recognized to increase feed conversion, and frequently also body weight, as it allows the animal to utilize the otherwise non-digestible fiber portion of the diet. Enzymes used to improve the digestibility of wheat and barley are cellulases, pectinases, &agr;-amylases and arabinoxylanases for wheat and &bgr;-glucanases for barley.
The soybean meal component of a corn/soybean meal diet, and to a lesser extent the corn fraction of such a diet, contains typically non-starch polysaccharides such as galactosides which also cannot be digested by the chicken. Chickens lack the enzyme &agr;-galactosidase, which would allow the animal to break down these non-starch polysaccharides into sugar molecules which then can be used by the animal. However, the chicken small intestinal tract houses a microbial flora that is reported to take up and utilize the galactoside fraction of soybean meal, competing not only for the energy content with the animal, but also causing secondary problems such as flatus and diarrhea.
Efforts have been made by others to produce an enzyme which will liberate nutrients from the non-digestible components of corn/soybean base diets. Results from these efficacy trials have been inconsistent. Accordingly, research on the use of enzymes such as cellulases, glucanases, xylanases, mannanases and also &agr;-galactosidase has led to the conclusion that these enzymes improve feed conversion as well as increase body weights, but no effect on increased white meat or decreased fat deposition has been reported.
SUMMARY OF THE INVENTION
The invention consists of a method for increasing feed conversion, increasing the yield of white meat, and decreasing the deposition of fat in poultry through the addition of &agr;-galactosidase to a commercial corn/soybean meal diet. The supplement is fed at a rate of between about 22.5 g/ton &agr;-galactosidase and about 75 g/ton &agr;-galactosidase of a commercial corn/soybean meal diet, and preferably between about 30 g/ton and about 45 g/ton. Feed conversion is increased between about 1% and about 10%, breast yields are increased by between about 1% and about 10%, and decrease in fat deposition is between about 1% and about 20%.
An object of the present invention is to provide a method for increasing the yield of white meat in poultry.
Another object of the present invention is to provide a method for decreasing the deposition of fat in poultry.
A further object of the invention is to provide a feed supplement including &agr;-galactosidase which when added to a commercial corn/soybean meal diet improves the feed conversion, reduces the deposition of fat, and increases the yield of breast meat in poultry.
These and other objects of the invention will be made apparent to persons skilled in the art upon a review of this specification, the associated figures, and the appended claims.
REFERENCES:
patent: 3657421 (1972-04-01), Berger
patent: 5356810 (1994-10-01), Fleno et al.
patent: 5459162 (1995-10-01), Saxton
patent: 9522601 (1995-08-01), None
patent: 9820750 (1998-05-01), None
Brinkhaus Friedhelm
Fontana Eddy A.
Greaves John A.
Lamptey Arlene T.
Smith Gary M.
Davis, Brown, Koehn, Shors & Roberts, P.C.
Herink Kent A.
Kemin Industries, Inc.
Rosenberg Daniel A.
Sayala Chhaya D.
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