Index:
Trial 1: Standard vs. Low Energy Diets
Trial 2: Standard vs. High Energy Diets
Conclusions

Trials 1 & 2

Objectives

• To determine the effectiveness of Rovabio™ Excel LC when applied to commercial corn/soybean meal-based diets fed to broilers
• To determine the above without the confounding of results with application of the product with post-pelleting equipment
• To evaluate the economic benefit based upon how integrators evaluate products relative to performance and yield data
• Evaluate this design model to use at other locations/regions/species

Justification

• Limited data on strictly corn/soybean meal animal protein-based broiler diets fed in the U.S. In addition, many companies have claimed this but have been unable to show CONSISTENT results. The industry has thus become leery of claims, but is still open to discussing new findings

Trial 1: Standard vs. Low-Energy Diets
Trial Design

• Broiler floor pen trial - 48 pens containing 60 Ross x Ross 308 straight run broilers at a
  stocking density of 0.67ft²
• Four Treatments: 2 x 2 Factorial
  Energy Level:
  1. 1999 Average AgriStats values*
  2. As #1 with 30 kcal/lb.
  decrease in ME
  * Nutrients factored with ME
  
  Enzyme Level:
  1. No added Rovabio™ Excel
  2. RovabioTM .181L/ton
  
  Start: April 7, 2000; All birds weighed at 0, 21 and 49 days of age
  End: May 26, 2000

* ADD 30 KCAL UPLIFT

Results

FC = Adjusted to 5.797 lb Live Weight
LW = Adjusted to 1.936 Adjusted for Mortality Feed Conversion

Trial 2: Standard vs. High-Energy Diets
Trial Design

• Broiler floor pen trial - 48 pens containing 60 Ross x Arbor Acre straight run broilers at a stocking density of 0.67ft²
• Four Treatments: 2 x 2 Factorial
  Energy Level:
  1. 1,375, 1,410 and 1,445 kcal/lb
  2. 1,405, 1,440 and 1,475 kcal/lb
  Enzyme Level:
  1. No added Rovabio™ Excel
  2. Rovabio™ Excel .181L/ton
  
  NOTE: The energy levels for the Low-Energy Diets in Trial 1 were not used due to having to dilute (alfalfa meal); i.e., they were not practical to make.
  
  Start: July 17, 2000; All birds weighed at 0, 21,and 49 days of age
  End: September 4, 2000

* ADD 30 KCAL UPLIFT

Results

FC = Adjusted to 5.614 lb Live Weight
LW = Adjusted to 1.995 Adjusted for Mortality Feed Conversion

1 Two males and 2 females per pen
2 Males only

Conclusions:

• The addition of Rovabio™ Excel to corn/soya diets improved weight gain and feed conversion. These differences were generally significant (P < 0.05) or tending toward significance).

• The standard energy diet + Rovabio™ Excel was the best overall performing group

• Comparing the 2 standard energy diets, the addition of Rovabio™ Excel numerically resulted in increased bottom line in feed cost savings.

Further considerations...

• These results demonstrate the consistency and repeatabilility of Rovabio™ Excel in growth tests. This model can be repeated in different locations.

• Rovabio™ Excel gives a response in diets with different energy levels.

• More work is necessary to understand in corn and/or soybean meal the factors influencing the magnitude of this response.