Date of Graduation

5-2013

Document Type

Dissertation

Degree Name

Doctor of Philosophy in Poultry Science (PhD)

Degree Level

Graduate

Department

Poultry Science

Advisor

Susan E. Watkins

Committee Member

Michael T. Kidd

Second Committee Member

William E. Huff

Third Committee Member

Charles F. Rosenkrans

Keywords

Biological sciences; Health and environmental sciences; Broiler diets; Canola meal; Poultry; Proteins; Rape seed

Abstract

Six experiments were conducted to evaluate the response of broilers fed canola meal. Experiment 1 assessed performance and carcass yields when broilers were fed various combinations of canola and soybean meal in nutritionally balanced diets based on digestible amino acid values. The results suggested that canola meal can be used in isocaloric diets as a partial replacement for Soybean meal.

Experiment 2 assessed broiler performance and carcass yields when using various levels of canola meal in broiler diets with a constant level of supplemental poultry oil. The resulting data suggested when diets are formulated with a constant level of supplemental fat; the level of CM should not exceed 10%.

Experiment 3 and 4 were conducted simultaneously which examined two diet types Corn-Soy (CS), Corn-Soy-Canola (CSC) and four amino acid (AA) levels (80, 85, 90, and 95% of suggested level). ProAct and Cibenza protease enzymes were added at 3 different levels (0, 1, and 2 times suggested amount). The resulting data suggested performance for birds fed incrementally higher percentages of AA and the CSC improved. The addition of enzymes did not significantly improve BW. However, the addition of ProAct at 2 times suggested level improved FCR within the three-way interaction.

Experiment 5 was conducted to evaluate pellet quality, broiler performance, and carcass characteristics of birds fed diet combinations of DDGS, SBM, and CM. These results concluded that 15 % DDGS and 20% CM can be used in combination without significantly affecting pellet quality. However, performance and parts yield displayed undesirable characteristics.

Experiment 6 was conducted using two diet types; isocaloric and optimum nutrient density, two amounts of DDGS (0 and 15%) and six levels of canola meal (CM) (0, 5, 10, 15, 20, and 25%). The resulting data suggest if diets are maintained isocalorically any combinations of ≤ 15% DDGS and ≤ 25% CM without significantly decreasing performance. If diets are maintained at optimum nutrient density and 15% DDGS, CM can be added at 10, 15 and 20% levels without depressing BW or FCR. However, if diets are maintained at optimum nutrient density and 0% DDGS are added, CM cannot be added without depressing BW.

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