Question

Grower diet of pigs should contain about

• A. 9 - 10% CP
• B. 11 - 12% CP
• C. 15 - 16% CP
• D. 21 - 22% CP

Hint:

Swine Protein Requirements:
Starter = $20 - 22\%$ CP.
Grower = 15 - 16% CP.
Finisher = $13 - 14\%$ CP.
Lactating Sow = $16 - 17\%$ CP.

Answer 1

The Correct Option is C

Step 1: Understanding the Concept:
Swine phase-feeding nutritional standards: grower pigs (20--50 kg body weight) require balanced crude protein levels of 15--16% with 0.75--0.85% standardized ileal digestible lysine.
Key Formula or Approach:
\[ \text{Swine Phase Protein Standards: Starter (20--22\%) } \rightarrow \text{Grower (15--16\%) } \rightarrow \text{Finisher (13--14\%)} \]

Step 2: Detailed Explanation:
Crude Protein (CP) requirements across swine growth phases (NRC ICAR standards):
1. Piglet Starter Diet (10--20 kg BW): $20\% - 22\%$ CP.
2. Pig Grower Diet (20--50 kg BW): 15% to 16% CP (providing approximately $3,150 - 3,250\text{ kcal DE/kg}$ and $0.80\%$ Lysine).
3. Pig Finisher Diet (50--100 kg BW): $13\% - 14\%$ CP.
Therefore, the grower diet of pigs should contain about 15 - 16% CP.

Step 3: Final Answer:
Therefore, grower diet of pigs should contain about 15 - 16% CP, corresponding to option (C).