Abstract
Simple SummarySelenium Auricularia cornea culture (SAC) is a dried product via full fermentation, containing organic-Se, Auricularia cornea (AC) mycelium, and various metabolites of AC. The objective of this study was to evaluate whether SAC could effectively improve the health, growth, meat quality, and oxidative stability of meat in growing-finishing pigs. Currently, dietary SAC supplementation positively impacts growth performance and oxidative stability of fresh meat.Selenium Auricularia cornea culture (SAC) is a new source of organic selenium. Two experiments were conducted to determine the available energy of SAC fed to pigs and to evaluate the effects of dietary SAC supplementation on growth performance, serum biochemical profiles, fecal short chain fatty acids (SCFA), meat quality, tissue selenium concentration, and oxidative stability of fresh meat in growing-finishing pigs. In Experiment (Exp.) 1, 12 barrows with average body weight (BW) of 42.40 ± 5.30 kg were randomly allotted to two groups and fed the basal diet and SAC-supplemented diet, individually. In Exp. 2, 96 growing-finishing pigs (BW: 91.96 ± 7.55 kg) were grouped into four dietary treatments; each treatment contained six replicates with four pigs per replicate. The four treatments fed a control diet and three experimental diets supplemented with 0.6%, 1.2%, and 2.4% SAC, respectively. The trial lasted for 45 days. The results revealed that digestible energy (DE) of SAC was 11.21 MJ/kg. The average daily gain (ADG) was improved in pigs fed 1.2% and 2.4% SAC during day 24 to 45 and the overall period. Dietary 1.2% and 2.4% SAC supplementation had a lower F/G (p < 0.05) than the control diet during different stages. Dietary SAC supplementation increased fecal butyrate contents (p < 0.05), and pigs fed 1.2% and 2.4% SAC diets had a higher MCT1 mRNA expression (p = 0.04) in the colon. Pigs fed 2.4% SAC had higher GSH-Px contents (p < 0.05) in serum, liver, and longissimus dorsi muscle (LDM) than those in the control group. The 2.4% SAC-supplemented group revealed a higher Se content (p < 0.05) in LDM and a lower MDA concentration (p < 0.05) in fresh meat during the simulated retail display on day six. In conclusion, this study suggested that SAC was more effective in improving growth, enhancing the antioxidant status, depositing Se in muscle, and increasing meat oxidative stability of pigs.
Highlights
Auricularia mushrooms, a member of the basidiomycetes, known as wood ears, are a group of edible fungi that form a gelatinous fruiting body [1]
It has been generally considered that Auricularia polysaccharides (AP) are the major bioactive substance
Compared with the control diet, pigs fed diets supplemented with Selenium Auricularia cornea culture (SAC) showed a decreased F/G (p < 0.05) value during day 1 to 23
Summary
Auricularia mushrooms, a member of the basidiomycetes, known as wood ears, are a group of edible fungi that form a gelatinous fruiting body [1]. As one of the traditional Chinese edible and medicinal fungi, Auricularia has been confirmed to possess various biological activities [4]. Various bioactivities of AP have been reported, including immunomodulatory, antioxidant, antitumor activities, hepatoprotective [5]. In the opinion of Miao et al (2020) [5], AP could activate the innate immune system and effector cells, including T-lymphocytes, B-lymphocytes, macrophages, and natural killer cells to express cytokines, such as IL-1β, TNF-α, IL-6, and IL-10. Five water-soluble APs from different varieties were all observed to have scavenging activities against superoxide, 2,2-diphenyl-1-picrylhydrazyl (DPPH), and hydroxyl radicals [7]. Wang et al (2018) [9]
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