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http://dx.doi.org/10.5713/ab.20.0556

Effects of corn particle size on energy and nutrient digestibility in diets fed to young pigs and adult sows  

Ma, Dongli (State Key Laboratory of Animal Nutrition, College of Animal Science and Technology, China Agricultural University)
Zhu, Tao (State Key Laboratory of Animal Nutrition, College of Animal Science and Technology, China Agricultural University)
Yang, Fengjuan (State Key Laboratory of Animal Nutrition, College of Animal Science and Technology, China Agricultural University)
Zhang, Shuai (State Key Laboratory of Animal Nutrition, College of Animal Science and Technology, China Agricultural University)
Huang, Chengfei (State Key Laboratory of Animal Nutrition, College of Animal Science and Technology, China Agricultural University)
Publication Information
Animal Bioscience / v.34, no.9, 2021 , pp. 1491-1498 More about this Journal
Abstract
Objective: This research was carried out to investigate the effects of corn particle size on the apparent total tract digestibility (ATTD) of energy and nutrients fed to pigs at four different growth stages and therefore to provide basis for better application of corn in pig feeds. Methods: Eighteen weanling piglets, 18 growing barrows, 24 gestating sows and 24 lactating sows were used in this study. Within each stage, pigs were allotted to 1 of 3 or 4 corn-soybean meal diets which were formulated with different corn particle size in a completely randomized design with 6 replicate pigs per diet. Each stage lasted for 19 days, including 7 days for cages adaptation, 7 days for adaptation to diets and followed by 5 days for total collection of feces and urine. Results: For nursery and growing stages, the results showed that digestible energy content and ATTD of gross energy (GE), dry matter (DM), neutral detergent fiber (NDF), and acid detergent fiber (ADF) was increased (p<0.05) as the corn particle size reduced. Meanwhile, the metabolizable energy content and ATTD of crude protein (CP) tended to increase. For gestating sows, no differences were found in the ATTD of nutrients among dietary treatments. As for lactating sows, there were linear and quadratic increases (p<0.05) in the ATTD of DM, GE, NDF as the corn being finer milled. Quadratic response in ATTD of ADF and CP (p<0.05) were observed as sows fed with four different diets. Conclusion: Reducing corn particle size can increase digestibility of nutrients fed to young pigs and lactating sows. No effects were observed in present experiment when gestating sows were fed with different particle sized corn.
Keywords
Adult Sows; Corn; Nutrient Digestibility; Particle Size; Young Pigs;
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