Effects of Dietary Fiber Level on Growth Performance, Organ Indexes, Intestinal pH and Antioxidant Capacity of Piglets with Different Weaning Weights

WEN Xiaolu; JIANG Zongyong; GAO Kaiguo; XIAO Hao; YANG Xuefen; WU Qiwen; WANG Li

doi:10.3969/j.issn.1006-267x.2021.08.054

2021 , Vol. 33 >Issue 8: 4760 - 4768

DOI: https://doi.org/10.3969/j.issn.1006-267x.2021.08.054

SHORT COMMUNICATION

Effects of Dietary Fiber Level on Growth Performance, Organ Indexes, Intestinal pH and Antioxidant Capacity of Piglets with Different Weaning Weights

WEN Xiaolu ,
JIANG Zongyong ,
GAO Kaiguo ,
XIAO Hao ,
YANG Xuefen ,
WU Qiwen ,
WANG Li

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Guangdong Key Laboratory of Animal Breeding and Nutrition, Guangdong Laboratory for Lingnan Modern Agriculture, Maoming Branch of Lingnan Laboratory of Modern Agricultural Science and Technology of Guangdong Province, Ministry of Agriculture and Rural Affairs, State Key Laboratory of Livestock and Poultry Breeding, Institute of Animal Science, Guangdong Academy of Agricultural Sciences, Guangzhou 510640, China

Received date: 2021-01-29

Online published: 2021-08-11

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Abstract

This experiment was conducted to study the effects of dietary fiber level on growth performance, organ indexes, intestinal pH and antioxidant capacity of piglets with different weaning weights. A total of 96 Duroc×Landrace×Yorkshire weaned piglets at aged of 21 days were allotted to 4 groups according to body weight with 6 replicates, and 4 pigs (2 barrows and 2 gilts) per replicate. The experiment was conducted with a 2×2 factorial design. The weaning weights were (5.00±0.05) kg and (7.07±0.06) kg, and the dietary fiber levels were 2.84% and 4.66% neutral detergent fiber (NDF), respectively. They were divided into low weaning weight and low fiber group, high weaning weight and low fiber group, low weaning weight and high fiber group, high weaning weight and high fiber group. The experiment lasted for 28 days. The results showed that dietary fiber level had no significant effect on average daily gain (ADG) and average daily feed intake (ADFI) of piglets with different weaning weights (P>0.05), ADG and ADFI of high weaning weight group were significantly higher than those of low weaning weight group (P<0.05). There was no significant difference in feed to gain ratio (F/G) among the groups (P>0.05). High fiber diet had a tendency to reduce the pH of colon contents (P=0.057); there was no significant effect on the pH of duodenum, jejunum and ileum contents (P>0.05); different weaning weights had no significant effect on the pH of duodenum, jejunum, ileum and colon contents (P>0.05). High fiber diet had a tendency to reduce liver (P=0.076) and heart (P=0.077) index; high weaning weight significantly increased the weight of liver, kidney, spleen, heart and lung (P<0.05). Dietary fiber level significantly increased the activity of glutathione peroxidase (GSH-Px) in plasma of piglets (P<0.05). High fiber diet significantly increased the activity of total superoxide dismutase (T-SOD) in plasma of high weaning weight piglets (P<0.05). Dietary fiber level and weaning weight had no significant effect on the total antioxidant capacity (T-AOC) and catalase (CAT) activity in plasma of piglets (P>0.05). In conclusion, increasing dietary fiber level without antibiotics has no significant effect on the growth performance of different weaning weight piglets, however, it reduces the pH of intestinal contents and improves the antioxidant capacity; the growth performance of high weaning weight piglets is significantly improved at the later stage.

Key words： weaned piglets; dietary fiber; weaning weight; growth performance; antioxidant capacity

Cite this article

WEN Xiaolu , JIANG Zongyong , GAO Kaiguo , XIAO Hao , YANG Xuefen , WU Qiwen , WANG Li . Effects of Dietary Fiber Level on Growth Performance, Organ Indexes, Intestinal pH and Antioxidant Capacity of Piglets with Different Weaning Weights[J]. Chinese Journal of Animal Nutrition, 2021 , 33(8) : 4760 -4768 . DOI: 10.3969/j.issn.1006-267x.2021.08.054

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