Effect of β-glucanase/pentosanase enzyme supplementation on the performance of chickens and laying hens fed wheat, barley, naked oats and rye diets

Abstract

was evident when chicks were given the wheat diet. In the second experiment, rhe addition of Roxazyme@ G to diets containing hulGss barley (0.1 g kg-1) and rye 14.0 g tg-tl improved feed consumption (8 and 16%, respectively), weight gain(21 and35%, respectivelyf and feed-to-gain ratios (i 1 and, l4Vo , respectively). Relative gizzard weights of birds fed the rye diet were reduced by 18 % when enzyme was added to this diet. In the third experiment, replacing all the wheat with hulless barley, naked oats or rye in diets for young pullets had no effect on overall performance during a i2-wk laying trial. Vent feather soilage increased with the incorporation ofnaked oats and rye. Enzyme supplementation had a beneficial effect on weight gain and feed intake but not on egg production, initiaiegg weight, average egg weight, egg specific gravity, Haugh unit score, and mortality.

Relationship between the stage of digestive tract development in chicks and the effect of viscosity reducing enzymes on fat digestion

“…The effect of viscosity on fat digestion is not so detrimental in adult birds, as diets containing 65% of wheat, barley, oats or rye supplemented with tallow did not negatively affect the laying rate, and enzyme supplementation did not have a positive effect on laying performance (Brenes et al, 1993). The absolute mass of GIT tissues increases when birds mature, even if it decreases relative to live body weight (Table 1).…”

“…The beneficial action of these enzymes has been associated with freeing nutrients masked by insoluble cell wall material (Hesselman and Aman, 1986) and with reducing digesta viscosity (Bedford and Classen, 1992) . Under practical conditions these enzymes are most effective in the first weeks of life of chickens, with little or no effects seen in adult birds (Brenes et al, 1993) because adult birds digest diets rich in viscous NSPs better than young ones (Smulikowska, 1995).…”

Effect of wheat cultivar and enzyme supplementation on nutrient availability and performance of laying hens

“…Pan et al (1998) reported significant improvements in AME n and feed efficiency with xylanase supplementation when diets containing 80% wheat or 65% rye were fed to 22-wk-old pullets. Brenes et al (1993) found that weight gain and feed intake (FI) of 22-wk-old pullets were improved by β-glucanase/pentosanase supplementation of diets containing 65% wheat, barley, naked oats, or rye, but the Haugh unit score of eggs produced was reduced. Unfortunately, these studies did not clarify whether the enzymes specifically affected the wheat-based diets because rye-based diets were included in the statistical analysis.…”

Influence of processing on dietary enzyme effect and nutritive value of diets for laying hens

“…Compared with the research on broilers, only limited research positively affected by enzyme supplementation has been reported on the use of dietary enzymes for laying (Trichoderma viride complex), without influencing egg prohens.Mostieportsdealwithaneffectofenzymeon"ggpro-duction and egg quality (Brenes et al 1993). Beneficial duction, but ^only a few investigate the influence on-ttre effects of a fungal-bacterial enzyme supplement on feed nutrient utilization.…”