The effect of organic acids and enzyme supplementation on the performance of pigs fed barley-based diets

Abstract

J. 1992. The effect of organic acids and enzyme supplementation on the performance of pigs fed barley-based diets. Can. J. Anim. Sci. 72: 395-402. Two factorial design experiments (sex X treatment) were conducted to determine the efficacy of enzyme and organic acid supplementation on improving the nutritive value ofbarley-based diets for both starter and finisher pigs. for exp. 1, 48 crossbred growing pigs (25.1 + 2.8 kg) were fed either a barleybased controi diet or a similar diet supplemented wtth0.25% enzyme (AspergiLlus nlger; 750 units g I beta-glucanase),2.5% propionic acid or a combination of these additives during a 77-d feeding irial. Forixp. 2, 120 cross6red weaner pigs (8.1 + 1.3 kg) were fed a hulless barley-based control diet or a similar diet supplemented with 0.25% enzyme (Aspergillus niger; 150 units g ' betaglucanase), 2.0% fumar\c icid or both additives in combination for a 35-d feeding period. In exp. 1, iupplementation with either enzyme or propionic acid alone, significantly (P<0.05) increased dry matter digestibility. However, when ihe additives were fed in combination, the digestibility coefficient for dr-y matter was not significantly different from the control. Digestibility coefficients for crude protein und .n.rgy were not;ffected by any treatment. Growth rate, feed intake, feed efficiency and carcass traits weie also not improved by supplementation with enzyme or propionic acid, either when fed alone or in combinarion. ln exp. 2. digesribiliry coefficients for dry matter. crude protein antJ energy were not affected by enzyme or acid treatment. In addition, there were no differences in growth, feed intake or feed efficiency is a result of any treatment. Supplementation with organic acids would therefbre appear to be ineffective in potentiating the response to dietary beta-glucanase in pigs fed barley-based diets.

Enzyme applications for monogastric feeds: A review

“…p-Glucan is also highly digestible in the ileum of pigs (Graham et al 1986), apparently more digestible than starch (Graham et al 1989) (Thacker et al 1988(Thacker et al , 1992b (Thacker et al , 1992a It seems that the most likely application would be in weanling pig diets where pancreatic enzyme production may be limiting (Lindemann et al 1986), which is consistent with industry practice. One final point to note is that most research trials have been conducted with older pigs.…”

“…One final point to note is that most research trials have been conducted with older pigs. In studies with weaniing pigs fed barley, both daily gain and feed conversion were moderately improved (but not significantly) with enzyme treatment (Thacker et al 1992b) and in one case a reduction in post-weaning diarrhoea was reported (Inborr and Ogle 1988 Slominski and Campbell (1990) did observe improved digestibility of the nonstarch polysaccharides of canola meal with enzyme supplementation (multi-activity). (Jacorzynski 1987).…”

Impact of gastric pH on dietary enzyme activity and survivability in swine fed β-glucanase supplemented diets

“…Attempts have been made to improve the performance of pigs fed barley through enz).rne supplementation. However, supplementation of barley-based diets with B-glucanase have not produced improvements in pig performance comparable to those observed with poultry (Thacker et al 1988(Thacker et al ,1992a.…”

Organic acids for performance enhancement in pig diets

“…* References: Kirchgessner & Roth-Maier, 1975;Kirchgessner & Roth, 1976, 1978a, 1987a, b, 1990Falkowski & Aherne, 1984;Giesting & Easter, 1985, 1991Broz & Schulze, 1987;Bolduan et al 1988a,b;Risley et al 1991;Eckel et al 1992a;Eidelsburger et al 1992b,d;Kirchgessner et al 1993Kirchgessner et al , 1997Krause et al 1994;Paulicks et al 1996;Roth et al 1996. { References: Thacker & Bowland, 1980;Thacker et al , 1992, 1989Petersen & Oslage, 1982a;Schulz & Oslage 1982;Giesting & Easter, 1985;Baustad, 1993;Kirchgessner et al 1997;…”