A. Lemme et al., Chromium yeast affects growth performance and plasma traits but not carcass characteristics of growing-finishing pigs depending on the glycemic index, ARCH ANIM N, 53(2), 2000, pp. 157-177
Citations number
39
Categorie Soggetti
Animal Sciences
Journal title
ARCHIVES OF ANIMAL NUTRITION-ARCHIV FUR TIERERNAHRUNG
Forty Swiss Large White pigs (barrows with 31.7 kg initial to 103.7 kg fina
l BW were equally and randomly assigned to one of four treatments (H0, H200
, LO, L200) involving a combination of chromium supplementation (0 or 200 m
u g/kg) and glycemic index thigh GI (H) or low GI (L)). Growth performance,
energy and protein digestibility, carcass composition, and some plasma tra
its were investigated.
The data indicated, that the substitution of dietary carbohydrates with fat
and crude fibre (low GI) resulted in lower growth performance due to impai
red energy digestibility. Moreover, the strong stimulation of insulin secre
tion due to the high and rapid availability of carbohydrates of the diets H
0 and H200 caused increased carcass fat deposition; Chromium supplementatio
n also affected plasma insulin and glucagon concentrations. Depending on gl
ycemic index, chromium affected the growth performance. Daily gain was redu
ced in pigs of the L200 treatment compared to the LO group. This finding in
dicated that the energy availability expressed as GI is one of several nutr
itional factors, which determine the efficacy of dietary chromium. We could
not corroborate evidences that dietary chromium modifies the chemical comp
osition of the whole carcass, but depending on GI, chemical composition of
the longissimus muscle was affected.