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Effects of potato chip co-product on starter pig growth
With rising feed costs, inclusion of by-products and co-products has become increasingly used in commercial swine diets. The hypothesis of this study was that potato chip co-products (PC) partially replace corn, fat, and salt in nursery swine diets with no detrimental impact on growth performance parameters. The objective was to measure growth performance of nursery pigs fed diets containing PC. Thirty-six weaned pigs (21 days of age) were blocked by litter of origin (12 sows with 3 male pigs per sow) and allocated to one of three dietary treatments: control (corn-soy based), replacement of 20% of corn with PC (PC20), or replacement of 40% of corn with PC (PC40) (9 pigs per diet). Treatments were imposed in three nursery dietary phases over a 5-week period (phase 1= wk 1, phase 2= wk 2-3, phase 3= wk 3-5). Within each phase, diets were formulated to be isonitrogenous and isocaloric, and to contain the same levels of fat and standardized ileal digestible lysine, methionine, and threonine. All diets were formulated to contain 0.3% supplemental salt (either as NaCl or from PC) and 0.1% titanium oxide as an indigestible marker. Piglets were housed in individual pens and fed twice daily to provide ad libitum access to feed. Feed intake was monitored daily, weight change was assessed weekly, and fecal grab sampling was performed once daily during the second week of phase 3 to estimate whole tract nitrogen digestibility. Data was analyzed using a mixed model with diet, week, and litter of origin (i.e., dam) as fixed effects and pig as random. Data is reported as least squares means and the standard error of mean (SEM). Across phases, daily weight gain, daily feed intake, and feed efficiency of pigs fed PC20 and PC40 compared to control did not differ. Nitrogen digestibility during phase 3 (week 5) did not differ. In conclusion, weaned pigs fed diets containing PC at 20 and 40% of the corn inclusion rate maintained growth performance. Results imply that PC may be used in part as an economical dietary replacement for corn, supplemental fat and salt in the nursery phase.
Items |
Diet |
SEM |
P-value |
||
Control |
PC20 |
PC40 |
|||
ADG (g) |
502.5 |
489.9 |
476.3 |
22.0 |
0.69 |
ADFI (g) |
681.3 |
640.0 |
666.2 |
27.2 |
0.55 |
Efficiency (gain/feed) |
0.692 |
0.747 |
0.714 |
0.033 |
0.49 |
Nitrogen Digestibility (%) |
86.7 |
84.0 |
85.3 |
1.3 |
0.37 |
Keywords: Nursery Digestibility Co-products