Effects of Illite on Growth Performance, Antioxidant Capacity, Immunity and Intestinal Morphology of Weaned Pigs

HU Jiangxu; LONG Shenfei; PIAO Xiangshu

doi:10.3969/j.issn.1006-267x.2019.08.040

Chinese Journal of Animal Nutrition >

2019 , Vol. 31 >Issue 8: 3784 - 3793

DOI: https://doi.org/10.3969/j.issn.1006-267x.2019.08.040

Effects of Illite on Growth Performance, Antioxidant Capacity, Immunity and Intestinal Morphology of Weaned Pigs

HU Jiangxu ,
LONG Shenfei ,
PIAO Xiangshu

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State Key Laboratory of Animal Nutrition, College of Animal Science and Technology, China Agricultural University, Beijing 100193, China

Received date: 2019-01-29

Online published: 2019-08-19

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Abstract

The objective of this study was to test the effects of dietary illite on growth performance, nutrient digestibility, serum antioxidant capacity and immunity, intestinal morphology and manure nitrogen output of weaned pigs. A total of 144 weaned pigs (Duroc×Landrace×Yorkshire), average weight of (7.27±0.89) kg, were randomly allotted to 3 groups with 8 replicate pens (3 barrows and 3 gilts per pen) per group in a randomized complete block design. The pigs in the control group were fed a corn-soybean meal type basal diet, and the others in experimental groups were fed the basal diets supplemented with 2 000 and 4 000 mg/kg illite via replacing equal amounts of corn, respectively. The experiment period lasting for 28 d. The results showed that, compared with the control group:1) pigs in 4 000 mg/kg illite supplemental group had significantly greater average daily gain and gain to feed ratio in day 1 to 14 and day 1 to 28 (P<0.05). Pigs in 4 000 mg/kg illite supplemental group had significantly decreased diarrhea rate in day 1 to 14 (P<0.05). 2) Pigs in 4 000 mg/kg illite supplemental group had significantly increased apparent digestibility of dry matter, crude protein and gross energy in day 1 to 14, and also had significantly increased crude protein apparent digestibility in day 15 to 28 (P<0.05). 3) Pigs in 4 000 mg/kg illite supplemental group had significantly increased serum contents of immunoglobulin A and immunoglobulin G, superoxide dismutase activity and total antioxidant capacity (T-AOC), as well as had significantly decreased serum malondialdehyde content at day 14 (P<0.05). Pigs in 4 000 mg/kg illite supplemental group had significantly increased serum T-AOC at day 28 (P<0.05). 4) Pigs in 4 000 mg/kg illite supplemental group had significantly greater villus height to crypt depth ratio (V/C) in jejunum and ileum (P<0.05), and those in the experimental groups tended to have greater villus height in ileum (P=0.07) and V/C in duodenum (P=0.06). 5) The fecal nitrogen excretion per weight gain of pigs in 4 000 mg/kg illite supplemental group was significantly decreased in day 1 to 14 (P<0.05), and that in the experimental groups tended to be decreased in day 15 to 28 (P=0.06). In conclusion, dietary 4 000 mg/kg illite can improve growth performance and nutrient digestibility by means of improving antioxidant capacity, immunity, intestinal morphology, as well as decreasing diarrhea rate and manure nitrogen output of weaned pigs.

Key words： illite; weaned pigs; growth performance; antioxidant capacity; nutrient digestibility; intestinal morphology

Cite this article

HU Jiangxu , LONG Shenfei , PIAO Xiangshu . Effects of Illite on Growth Performance, Antioxidant Capacity, Immunity and Intestinal Morphology of Weaned Pigs[J]. Chinese Journal of Animal Nutrition, 2019 , 31(8) : 3784 -3793 . DOI: 10.3969/j.issn.1006-267x.2019.08.040

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