- A 2 x 2 factorial broiler feeding trial with dietary nitrogen level and whole wheat blending as factors was conducted.
- Reduction of dietary nitrogen by 0.5 % across all 4 phases did not affect final body weight, feed conversion ratio nor breast meat deposition. Water intake, nitrogen excretion and litter weight were significantly reduced by 5.8 %, 9.6 % and 11.0 %, respectively. Dry matter content of litter increased by 11.3 % while N-content in dry matter of litter decreased by 3.4 %.
- Blending diets with 5 %, 10 %, and 15 % whole wheat in the grower I, grower II and finisher phases impaired final body weight, feed conversion ratio and breast meat yield by 3.8 %, 3.9 %, and 5.7 % on average. Water intake was decreased by 5.8 %, nitrogen excretion by 15.5 % and litter weight by 11.0 %. Dry matter content of litter increased by 11.3 % and N-content in litter dry matter by 4.4 %.
- Economic calculations revealed that reduction of dietary nitrogen reduced net profit per pen by 14 % due to increased diet cost whereas wheat blending of the standard diets impaired net profit per pen by 18 %. Blending the N-reduced diet with wheat slightly improved net profit by 3.5 %.