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http://dx.doi.org/10.5187/jast.2022.e28

Effects of dietary protease supplementation on growth rate, nutrient digestibility, and intestinal morphology of weaned pigs  

Minho, Song (Division of Animal and Dairy Science, Chungnam National University)
Byeonghyeon, Kim (Division of Animal and Dairy Science, Chungnam National University)
Jin Ho, Cho (Division of Food and Animal Science, Chungbuk National University)
Hyunjin, Kyoung (Division of Animal and Dairy Science, Chungnam National University)
Sangwoo, Park (Division of Animal and Dairy Science, Chungnam National University)
Jee-Yeon, Cho (DSM Nutrition Korea Ltd.)
Kyeong Il, Park (Division of Animal and Dairy Science, Chungnam National University)
Hyeun Bum, Kim (Department of Animal Resources Science, Dankook University)
Jeong Jae, Lee (Division of Animal and Dairy Science, Chungnam National University)
Publication Information
Journal of Animal Science and Technology / v.64, no.3, 2022 , pp. 462-470 More about this Journal
Abstract
The addition of dietary proteases (PRO) to weaner diets hydrolyzes soybean-based anti-nutritive factors and improves weaned pig's dietary digestibility and growth performance. Therefore, this study explores the effects of PRO in a lower crude protein (CP) level diet than that in a commercial diet on the growth performance, nutrient digestibility, and intestinal morphology of weaned pigs. A total of 90 weaned pigs were randomly assigned to 3 dietary treatments with 6 pigs per pen and 5 replicated pens per treatment using a randomized complete block design (block = body weight [BW]): 1) a commercial weaner diet as a positive control (PC; phase1 CP = 23.71%; phase2 CP: 22.36%), 2) lower CP diet than PC as a negative control (NC; 0.61% less CP than PC), and 3) an NC diet with 0.02% PRO. Pigs fed PC and PRO had higher (p < 0.05) final BW, average daily gain, and/or gain to feed ratio for the first three weeks and the overall experimental period than NC. The PC and PRO groups had greater (p < 0.05) apparent ileal digestibility of dry matter, CP, and energy than the NC group. Moreover, pigs fed PC and PRO increased (p < 0.05) apparent total tract digestibility of CP compared with those fed NC. In addition, the PRO group had a higher number of goblet cells than the PC and NC groups. However, pig fed PC and PRO increased (p < 0.05) villus height and height to crypt depth ratio in the ileum compared with those fed NC. In conclusion, PRO supplementation in a commercial weaner diet with low CP levels improves growth rate and nutrient digestibility by modulating the intestinal morphology of weaned pigs.
Keywords
Commercial weaner diet; Dietary protease; Growth rate; Intestinal morphology; Nutrient digestibility; weaned pigs;
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Times Cited By KSCI : 9  (Citation Analysis)
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