The effects of phytase and phytic acid on the loss of endogenous amino acids and minerals from broiler chickens
- 1 February 2004
- journal article
- research article
- Published by Informa UK Limited in British Poultry Science
- Vol. 45 (1), 101-108
- https://doi.org/10.1080/00071660410001668923
Abstract
1. The effects of myo-inositol hexaphosphate (IP6) and phytase (EC 3.1.3.26) on the excretion of endogenous compounds were investigated using growing broiler chickens. 2. A total of 32 female Ross broilers were used in a precision feeding assay involving a 2×2 factorial arrangement of treatments. The materials administered were glucose, glucose + 1000 units of phytase activity (FTU), glucose + 1 g of IP6 and glucose + 1 g of IP6 + 1000 FTU. Excreta were collected quantitatively over a 48-h period following intubation of the test materials. The excretion of nitrogen, amino acids, minerals, sialic acid and phytate phosphorus was determined. 3. The ingestion of 1 g of IP6 by broilers increased the excretion of endogenous nitrogen, amino acids, iron, sodium, sulphur and sialic acid compared with birds fed on glucose. Supplementation of IP6 with exogenous phytase reduced the excretion of endogenous amino acids, calcium, sodium, phytate phosphorus and sialic acid compared with birds fed IP6. 4. It can be concluded that IP6 increases the excretion of endogenous minerals and amino acids in broiler chickens. Part of the beneficial effects of the addition of exogenous phytases to the diets of poultry appears to be mediated through a reduction in endogenous losses of these nutrients.Keywords
This publication has 28 references indexed in Scilit:
- Supplementation of diets containing pea meal with exogenous enzymes: Effects on weight gain, feed conversion, nutrient digestibility and gross morphology of the gastrointestinal tract of growing broiler chicksBritish Poultry Science, 2003
- The effects of dietary enzymes on the endogenous losses from broiler chickensBritish Poultry Science, 2002
- Phytic Acid Chemistry: Influence on Phytin-Phosphorus Availability and Phytase EfficacyJournal of Applied Poultry Research, 2002
- Food phytate and its hydrolysis productsNutrition Research, 1999
- The Effect of Enzymes on DigestionJournal of Applied Poultry Research, 1996
- Hydrolysis of phytate and inositol tri-, tetra-, and penta- phosphates by the intestinal mucosa of the pigNutrition Research, 1996
- The use of enzymes in poultry dietsWorld's Poultry Science Journal, 1996
- Phytate: A good or a bad food component?Nutrition Research, 1995
- Total phosphorus, phytate-phosphorus and phytase activity in plant feedstuffsAnimal Feed Science and Technology, 1994
- Sensitive method for the rapid determination of phytate in cereals and cereal productsJournal of the Science of Food and Agriculture, 1983