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Revista Computadorizada de Producción Porcina Volúmen 7 Número 3 (2000)
These results cannot indicate that probably a substantial amount of energy disappearing
from the pig’s gastrointestinal tract could be in form of end-products of bacterial activity
when the animals were given Jerusalem artichokes, due to the fact that fructose polymers
in the tubers can not be hydrolyzed by mammal enzymes (Graham and Amman 1986).
Therefore, it is possible that differences in net energy from both diets should be
substantially different. Nevertheless, the design of the current experiment could not
support this hypothesis.
N balance. The same general trend found in the energy balance was observed in retention
of N (table 4) by pigs. N retention, expressed as the percentage of dietary N was
significantly lower (P