ANSC 1111 Lecture 19: Swine nutrition
Document Summary
Pork production in pounds has increased over the years. The number of operations has decreased over the years, but most of the pigs are on larger farms. 60-75% of production costs are from feed. High protein (lysine, which is an essential amino acid) initially, then it decreases. An ideal protein is a protein that gives you all of the amino acids you require in the correct ratio. Plant protein feeds can be matched, but it will take more than one. Fed a cheaper ration than the last stage. Breeding gilts chosen from market weight pigs. Gilts bred at 7-8 months of age, flushing. Similar to gestation/lactation crates, but they have a lot more. Limiting aa: lysine > tryptophan > threonine > methionine. Diets related to environmental impact and nitrogen excretion, the best way to go is with a 10% protein diet since there is less nitrogen excretion. We usually overfeed phosphorus since it is not digestible.
