Study Name: Improving Milk Production Efficiency and Mitigating Feed Costs in Lactating Sows

Summary: The objectives were to determine if lactating sows can be fed diets containing less protein to reduce the quantity of nitrogen excreted into the environment. Also, to determine if sows fed reduced–crude–protein diets improve their lactation performance when housed under hot environmental temperature.

Key Points:

  • Sows fed crude–protein diets as low as 12 percent, supplemented with amino acids, maintained lactation performance and reduced urine nitrogen levels and ammonia air emissions.
  • Lower crude–protein diets do not reduce the heat produced by sows and their piglets.
  • When crystalline amino acid prices are favorable to protein prices, production costs could be reduced if nitrogen excretion becomes regulated.