Directory UMM :Data Elmu:jurnal:A:Animal Feed Science and Technology:Vol86.Issue1-2.Jul2000:
Animal Feed Science and Technology
86 (2000) 15±26
Effect of sources of maize and maize
particle sizes on the utilization of
phytate phosphorus in broiler chicks
A.B. Kasim, H.M. Edwards Jr.*
Department of Poultry Science, The University of Georgia, Athens, GA 30602-2772, USA
Received 8 November 1999; received in revised form 30 March 2000; accepted 25 May 2000
Abstract
Two experiments were conducted to test the effects of sources of maize and maize particle sizes
on the utilization of phytate P in broiler chicks fed on maize±soyabean meal diets de®cient in P. In
Experiment 1, maize from four consignments was ground separately using the same milling facility.
Four maize±soyabean diets representing each maize source, and two control diets made of maizestarch±soyabean meal (maize starch control diet) and maize±soyabean meal-casein (casein control
diet) were tested. The maize starch control diet was used to evaluate the ability of chicks to utilize
phytate P when they were provided solely by soyabean meal. The casein control diet had similar
amounts of total P as the diets containing the four maize sources, but part of the maize and soyabean
meal was substituted with casein so that the diet contained greater amounts of available P and less
phytate P. Experiment 2 was conducted on a 32 factorial arrangement, consisting of three diets
each containing maize differing in geometric mean diameter (GMD), and two levels of dietary
phytase at 0 and 600 FTU/kg. Sources of maize signi®cantly (p
86 (2000) 15±26
Effect of sources of maize and maize
particle sizes on the utilization of
phytate phosphorus in broiler chicks
A.B. Kasim, H.M. Edwards Jr.*
Department of Poultry Science, The University of Georgia, Athens, GA 30602-2772, USA
Received 8 November 1999; received in revised form 30 March 2000; accepted 25 May 2000
Abstract
Two experiments were conducted to test the effects of sources of maize and maize particle sizes
on the utilization of phytate P in broiler chicks fed on maize±soyabean meal diets de®cient in P. In
Experiment 1, maize from four consignments was ground separately using the same milling facility.
Four maize±soyabean diets representing each maize source, and two control diets made of maizestarch±soyabean meal (maize starch control diet) and maize±soyabean meal-casein (casein control
diet) were tested. The maize starch control diet was used to evaluate the ability of chicks to utilize
phytate P when they were provided solely by soyabean meal. The casein control diet had similar
amounts of total P as the diets containing the four maize sources, but part of the maize and soyabean
meal was substituted with casein so that the diet contained greater amounts of available P and less
phytate P. Experiment 2 was conducted on a 32 factorial arrangement, consisting of three diets
each containing maize differing in geometric mean diameter (GMD), and two levels of dietary
phytase at 0 and 600 FTU/kg. Sources of maize signi®cantly (p