Confirmation of phosphorus availability in low-phytate and high-protein corn to growing-finishing large white toms
Klunzinger, M.W., Roberson, K.D. and Charbeneau, R.A. (2005) Confirmation of phosphorus availability in low-phytate and high-protein corn to growing-finishing large white toms. Journal of Applied Poultry Research, 14 (1). pp. 94-105.
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A 115-d (16.5-wk) experiment was conducted to validate the estimated availability of P in a high nutrient-dense (amino acids and calories), low-phytic acid (NDLP) corn variety as compared with conventional yellow dent (YD) corn when fed to commercial toms. The NDLP corn contained 0.32% P and 90% of this was nonphytate P (NPP) compared with YD corn, which had 0.25% P and 32% of the total P was NPP. Toms consuming NDLP corn were fed diets formulated to have the same dietary NPP level as the control diet with reduced levels of total P. Phosphorus was successfully formulated at 90% availability for NDLP corn with no compromise to growth performance or bone integrity measurements compared with the control diet with YD corn. Ulna breaking strength was the most sensitive measurement of dietary P adequacy under the conditions of the experiment. Excretion of P from toms was decreased by 30% when NDLP corn was fed in place of YD corn during the finishing phase, and litter P was decreased by 19% by replacement of YD corn with NDLP corn.
|Publication Type:||Journal Article|
|Publisher:||Poultry Science Association|
|Copyright:||2005 Poultry Science Association|
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