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https://doi.org/10.5713/ab.22.0418    [Accepted] Published online January 24, 2023.
Inclusion of dietary nontoxic sulfur on growth performance, immune response, sulfur amino acid content and meat characteristics in growing-finishing pigs
Hae Won Shin1  , Xing Hao Jin1  , Min Jin Gim1  , Il Ho Kim2  , Yoo Yong Kim1,* 
1Department of Agricultural Biotechnology and Research Institute of Agriculture and Life Science, Seoul National University, Seoul 08826, Korea
2Nara Bio Co., Ltd., R&D Center, Gunsan-si 54006, Korea
Correspondence:  Yoo Yong Kim,Email: yooykim@snu.ac.kr
Received: 3 November 2022   • Revised: 4 January 2023   • Accepted: 17 January 2023
Abstract
Objective
This experiment was conducted to evaluate the inclusion of dietary nontoxic sulfur on growth performance, immune response, sulfur amino acid composition and meat characteristics in growing-finishing pigs.
Methods
A total of 140 crossbred pigs ([Yorkshire × Landrace] × Duroc) with an average body weight of 34.73 ± 0.66 kg were used for the 12-week feeding trial. Experimental pigs were allotted to one of 5 treatments in 4 replicates of 7 pigs per pen in a randomized complete block (RCB) design. The experimental treatments were as follows (0%, 0.1%, 0.2%, and 0.4% nontoxic sulfur (NTS) levels): 1) Control: corn soybean meal (SBM)-based diet, 2) NTS0.1: basal diet + NTS 0.1%, 3) NTS0.2: basal diet + NTS 0.2%, 4) NTS0.4: basal diet + NTS 0.4%.
Results
Body weight increased linearly as dietary nontoxic sulfur (NTS) levels increased up to 2% (linear, p=0.04) in the early finishing phase (9 weeks). During the whole experimental period, body weight and average daily gain linearly increased as the dietary nontoxic sulfur level increased in the diet (linear, both p=0.01), but quadratic responses in body weight and average daily gain were observed with the addition of NTS 0.4% (quadratic, both p=0.01). In the late finishing period, the IgG concentration increased linearly (linear, p=0.01) as the dietary nontoxic sulfur level increased up to 4%. In the finishing period, a linear response was observed as a dietary nontoxic sulfur level was added (linear, p=0.03), and supplementation with 0.2% NTS resulted in a higher methionine content than the other treatments (quadratic, p=0.01). NST 0.2% had a lower value of TBARS (quadratic, p=0.01).
Conclusion
Consequently, supplementation withdietary nontoxic sulfur up to 0.2% could improve growth performance, amino acid composition in hair and meat antioxidation capacity.
Keywords: Nontoxic Sulfur; Growth Performance; Immune Response; Growing-finishing Pigs


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