Availability of Phosphorus and Nutritive Value of Hydrolyzed Rice Bran with Enzyme Phytase in Combination with Acids in Layer Hens Diets(Thai)

Abstract

An experiment was conducted to investigate the effects of four different methods of 10 % hydrolyzed rice bran supplement replacing rice bran in negative control laying hen diets compared with the two control groups (negative control supplementation with 500 FTU phytase/kg diet and positive control supplementation with dicalcium phosphate, DCP). The effect on egg production (EP), feed efficiency ratio (g feed: g egg),egg weight quality of eggs in Haugh Units, specific gravity and egg shell thickness in the four periods of 28-d and overall periods (22-25, 26-29, 30-33, 34-37 or 22-37 wk) in 144 ISA Brown 2000 laying with 4 replications and 6 birds for each replication was observed. The results from this study show that feeding with four different methods of hydrolyzed rice bran did not have significant effect on egg production, feed efficiency, egg weight, Haugh Units, specific gravity and egg shell thickness for all periods of testing. The results of this study show that all four methods of including hydrolyzed rice bran were verified with the results obtained by the in vitro testing on liberating inorganic phosphorus and also showed multi-property effects on inactivating the anti-nutritional compounds in rice bran for improvement of feed quality in laying hens, when compared with both negative and positive control groups.