Abstract
ABSTRACTThe present study investigated the effects of dietary supplementation of multienzyme preparation on growth performance, apparent total tract digestibility (ATTD) of nutrients, and gut health of weaned pigs. A total of 240 weaned pigs (initial body weight: 7.3 ± 0.7 kg) were randomly allotted to five treatments on the basis of body weight. The dietary treatments included a corn–soybean meal (SBM)-based diet supplemented with 0 (control), 0.025, 0.050%, 0.075%, or 0.10% multienzyme preparation. The experimental diets were fed in a meal form for two phases (d 0–14, phase I and d 15–28, phase II). Increasing multienzyme supplementation linearly improved overall (d 0–28) average daily gain, gain:feed, and ATTD of dry matter, gross energy, and crude protein. At d 21, pigs fed dietary increasing levels of multienzyme preparation had linearly greater Lactobacillus spp. (ileum and caecum and faeces) and fewer Clostridium spp. (ileum and caecum) and Escherichia coli (ileum and faeces) populations. On d 28, villus height of the jejunum and ileum were linearly increased with dietary increase in multienzyme preparation. In conclusion, this multienzyme has potential to improve the growth performance, ATTD of nutrients, and gut health of weaned pigs fed a corn–SBM-based diet in the absence of antibiotics growth promoters.
Highlights
Exogenous enzymes have been successfully used in the pigs industry to minimize or eliminate the negative effect of antinutritional factors, to stimulate nutrient digestibility and improve nutritive values of high non-starch polysaccharides (NSP) containing feedstuff such as wheat, oats, barley, and rye (Willamil et al 2012; Kianfar et al 2013; Karimi & Zahedi 2015)
It is thought that feedstuff like corn and SBM may not benefit from exogenous enzyme supplementation due to lower level of soluble NSP and lesser viscosity (Kim et al 2004; Willamil et al 2012)
The objectives of the present study were to investigate the effects of dietary supplementation of multienzyme preparation on growth performance, apparent total tract digestibility (ATTD) of nutrients and energy, intestinal and faecal microflora, and intestinal morphology of weaned pigs fed a corn–SBM-based diet in the absence of antibiotics growth promoters
Summary
Exogenous enzymes have been successfully used in the pigs industry to minimize or eliminate the negative effect of antinutritional factors, to stimulate nutrient digestibility and improve nutritive values of high non-starch polysaccharides (NSP) containing feedstuff such as wheat, oats, barley, and rye (Willamil et al 2012; Kianfar et al 2013; Karimi & Zahedi 2015). Corn contains 10–11% NSP, which are mainly arabinoxylan and β-galactomannan, and SBM contains 22.7% NSP such as αgalactosides [e.g. stachyose (fructose, glucose, and two galactoses), raffinose (fructose, glucose, and galactose)] and β-galactomannan that cannot be metabolized by monogastric animals because they lack endogenous enzymes targeting these NSP or antinutritional factors (CVB 1998). This indicates that there is some room for the improvement of their nutritional value with exogenous enzyme supplementation (Thacker 2005; Jo et al 2012). The objectives of the present study were to investigate the effects of dietary supplementation of multienzyme preparation on growth performance, ATTD of nutrients and energy, intestinal and faecal microflora, and intestinal morphology of weaned pigs fed a corn–SBM-based diet in the absence of antibiotics growth promoters
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