Evaluation of Fertilizer Phosphates in Turkey Diets

Authors

Franklin John Struwe, University of Nebraska-Lincoln

Date of this Version

8-1975

Document Type

Thesis

Citation

Thesis (M.S.)—University of Nebraska—Lincoln, 1975. Department of Poultry and Wildlife Sciences.

Comments

Copyright 1975, the author. Used by permission.

Abstract

Five experiments were conducted with Large White turkeys to determine the feasibility of using fertilizer phosphates as a source of supplemental phosphorus for starting, growing and finishing turkeys in practical, corn-soybean meal diets.

The objectives of this study were: (1) to determine and compare the relative biological value of two fertilizer phosphates, concentrated triple superphosphate (CSP), and diammonium phosphate (DAP), and phosphated egg shell with a reference standard which was mono-sodium phosphate, NaH₂PO_4*H₂O (A. R. or technical grade), (2) to determine the possible fluorine toxicity of CSP and DAP in diets for starting and growing-finishing turkeys, (3) to determine the effect of higher levels of dietary phosphorus on body weight gain, bone breaking strength, percent bone ash and survival, (4) to determine the toxicity of calcium fluorphosphate from CSP and DAP as compared to sodium fluoride, (5) to determine the response of turkeys fed CSP, DAP and partially defluorinated phosphate from day-old to 20 weeks of age, and (6) to determine the response of turkeys to “minimal” and “optimal” levels of “available” phosphorus from day-old to 20 weeks of age.

Advisor: Thomas W. Sullivan