Question

In your feed mill, you have steam-flaked corn (80% DM, 8.5% CP [DM], 12% crude fiber [DM], 95% TDN [DM]) and soybean meal (89% DM, 52.8% CP [DM], 7% crude fiber [DM], 79.5% TDN [DM]). You have been asked to formulate a growing pig ration containing 22% crude protein on a dry matter basis Using the Pearson square, what percentages of beet pulp and corn gluten meal need to be included in this supplement?

Answer 1

To formulate a growing pig ration containing 22% crude protein on a dry matter basis, you can use the Pearson square method. Based on the calculations, you will need approximately 36.4% beet pulp and 63.6% corn gluten meal in the supplement to achieve the desired protein content.

Step-by-step explanation:

To formulate a growing pig ration containing 22% crude protein on a dry matter basis, you can use the Pearson square method.

Step 1: Determine the nutrient percentages in the current feed.

• Steam-flaked corn: 8.5% CP (DM)
• Soybean meal: 52.8% CP (DM)

Step 2: Set up the Pearson square with the desired protein content (22% CP) in the center and the nutrient percentages of the potential ingredients (beet pulp and corn gluten meal) on either side.

Step 3: Use the formula (desired percentage - existing percentage) / (higher percentage - lower percentage) to calculate the weight ratio of the two ingredients. Multiply the result by 100 to get the percentage.

Based on the calculations, you will need approximately 36.4% beet pulp and 63.6% corn gluten meal in the supplement to achieve the desired protein content.