WHC, and/or changes in the composition and content
of bacteria in the small and large intestine [23-25].
Reducing particle size has been reported to improve
the feed efficiency and nutrient digestion of weaned pigs
[19,21]. There appears to be a particle size by age of pig
interaction in digestibility, resulting in a larger response
in young as compared to older pigs [19]. This can be explained
by the development of the digestive and absorptive
capacity in the small intestine and increased
colonization of carbohydrate-degrading microbiota in
the large intestine with increasing age. There are also indications
of a particle size by enzyme interaction for the
total tract apparent digestibility of dietary components
in pigs [21].
Reduction in particle size (1 versus 3 mm) increased
the total tract apparent digestibility of dietary components
and the average daily gain (ADG) of Landrace x
Yorkshire pigs in the post-weaning period, but not in
the growing period [26]. Moreover, addition of a multienzyme
mixture (mixture of α-amylase, β-glucanase, cellulase
and protease) improved the total tract apparent
digestibility of dietary components and growth performance
in the post-weaning period [26]. However, there
was an interaction between particle size and multienzyme
supplementation on the total tract apparent digestibility
of crude protein (CP) and neutral detergent
fibre (NDF) in the post-weaning period, such that multienzyme
supplementation increased the total tract apparent
digestibility of CP and NDF in the larger particle size
diet (80% vs. 75%, and 58% vs. 51%, respectively), while
there was no changes in a small particle size diet (80% vs.
78%, and 59% vs. 55%, respectively). However, in the
growing period multi-enzyme supplementation had no
positive effect on the performance and the total tract apparent
digestibility of dietary components, with the exception
of CP and NDF (Table 1).
WHC, and/or changes in the composition and content
of bacteria in the small and large intestine [23-25].
Reducing particle size has been reported to improve
the feed efficiency and nutrient digestion of weaned pigs
[19,21]. There appears to be a particle size by age of pig
interaction in digestibility, resulting in a larger response
in young as compared to older pigs [19]. This can be explained
by the development of the digestive and absorptive
capacity in the small intestine and increased
colonization of carbohydrate-degrading microbiota in
the large intestine with increasing age. There are also indications
of a particle size by enzyme interaction for the
total tract apparent digestibility of dietary components
in pigs [21].
Reduction in particle size (1 versus 3 mm) increased
the total tract apparent digestibility of dietary components
and the average daily gain (ADG) of Landrace x
Yorkshire pigs in the post-weaning period, but not in
the growing period [26]. Moreover, addition of a multienzyme
mixture (mixture of α-amylase, β-glucanase, cellulase
and protease) improved the total tract apparent
digestibility of dietary components and growth performance
in the post-weaning period [26]. However, there
was an interaction between particle size and multienzyme
supplementation on the total tract apparent digestibility
of crude protein (CP) and neutral detergent
fibre (NDF) in the post-weaning period, such that multienzyme
supplementation increased the total tract apparent
digestibility of CP and NDF in the larger particle size
diet (80% vs. 75%, and 58% vs. 51%, respectively), while
there was no changes in a small particle size diet (80% vs.
78%, and 59% vs. 55%, respectively). However, in the
growing period multi-enzyme supplementation had no
positive effect on the performance and the total tract apparent
digestibility of dietary components, with the exception
of CP and NDF (Table 1).
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