Abstract
Liquid feeding has many potential benefits over conventional dry feeding of pigs, such as improved gut health, use of inexpensive liquid co-products from the food and biofuel industry, flexibility and ease of feed delivery, and manipulation of feeding value of ingredients with enzymes and microbial inoculants. These benefits can result in improved growth performance and feed efficiency, reduce the reliance on feeding antibiotics and improve public views on pork production and pork products. In the province of Ontario, Canada, about 20% of growingfinishing pigs are currently raised on liquid feeding systems and experience has been gained with liquid feeding corn-based diets. Based on growth performance of high health status pigs, there is limited benefit of liquid feeding corn-based diets to growing-finishing pigs. This is in contrast to European findings, where swine liquid feeding research is more focused on wheatand barley-based diets. Recent research shows that liquid feeding allows for an effective use of liquid corn distillers solubles and corn steep water. In general, and when used at 15% or less of feed dry matter content, the use of corn distillers solubles and corn steep water does not result in major changes in pig growth performance, or carcass and meat quality. The feeding value of wheat shorts appears improved in liquid fed pigs. There is potential to further enhance the value of feed ingredients for the pig by steeping with enzymes and controlled fermentation with microbial inoculants. Uncontrolled (proteolytic) fermentation which contributes to reduced feed palatability and nutritional value of liquid feeds can be minimized via control of feed pH and lactic acid content. When using liquid feeding systems, pigs should have access to an additional source of water. Management of liquid feeding systems requires computer and engineering skills and attention to detail, especially when using co-products with variable nutrient content.
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Acknowledgements
The swine liquid feeding research program at the University of Guelph is supported by a number of organizations, including Swine Liquid Feeding Association, Natural Sciences and Engineering Research Council of Canada, Ontario Pork, the Ontario Ministry of Agriculture Food and Rural Affairs (OMAFRA) Food Safety Research Program, OMAFRA & University of Guelph Research Partnership Program, Swine Innovation Porc, AB Agri. Ltd., Agribrands Purina Canada Inc., Big Dutchman, B.S.C. Nutrition, Chris Hansen Animal Health and Nutrition, Casco Inc./Corn Products International, Daco laboratories Inc., Dwyer Manufacturing Ltd., Farmix Ltd., Grand Valley Fortifiers, Furst McNess Co. Ltd. Great Lakes Nutrition/Wallenstein Feeds, Kenpal Farm Products Inc. and Lallemand Specialties Inc./Institute Rosell A number of students, post-doctoral fellows and technical support staff have contributed to this program, including J. Zhu, D. Wey, S. Niven, M. Or-Rashid, J. Squire, D. Columbus, D. Woods, J. Guimaraes, M. Rudar and K. de Ridder.
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de Lange, C.F.M., Zhu, C.H. (2012). Liquid feeding corn-based diets to growing pigs: practical considerations and use of co-products. In: Patience, J.F. (eds) Feed efficiency in swine. Wageningen Academic Publishers, Wageningen. https://doi.org/10.3920/978-90-8686-756-1_3
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DOI: https://doi.org/10.3920/978-90-8686-756-1_3
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