Tdz. Setenareski et In. Doprado, EFFECT OF SOYBEAN TEXTURIZED PROTEIN ON G ROWTH, APPARENT DIGESTIBILITY AND RETENTION IN PRERUMINANT KIDS, Arquivos de biologia e tecnologia, 36(2), 1993, pp. 363-374
Eighteen 7-day-old crossbred male kids (3/4 Saanen) were used to study
growth, feed intake, diarrhea occurrence, apparent digestibility and
diet retention. Diets consisted of cow milk (CM) or a milk replacer in
which 30% of soy protein (SP30) or 60% af-soy protein (SP60) in which
CM proteins were substituted by texturised soy protein. Kids were rem
oved from their dams soon after birth and received colostrum until 3(r
d) dau. Goat's milk was gradually replaced by the experimental diets f
rom the 8(th) day (2 days of transition) which were continued until th
e 49(th) day (200g/Kg/LW/day). The animals' health was good during the
experimental period. Three kids died on SP60 diet. The average daily
gain (g/day) and feeding intake (% of above proposed diet given) for C
M, SP30 and SP60 diets were respectively (average+/-deviation standard
): 144,13+/-25,81a; 129,13+/-35,40a; 108,40+/-12,43b and 99.95; 98,80;
99,27%. Apparent digestibility of dry matter, crude protein, organic
matter and phosphorus was higher (P<0,05) in CM diet, lower in SP60 di
et and intermediate in SP30 diet. Fat digestibility was higher (P<0,05
) in CM diet than in the SP60 one. However, it was similar in CM and S
P30 diets and the SP30 and SP60 diets. Nevertheless. the apparent dige
stibility of ash and calcium did not differ between the 3 diets. The a
pparent digestibility of nitrogen-free extract was higher (P<0,05) for
CM and SP30 diets than with SP60 diet. The apparent retention of nitr
ogen and calcium did not differ significantly between CM, SP30 and SP6
0 diets. The apparent retention of phosphorum was similar (P>0,05) bet
ween CM and SP30, and SP30 and SP60 diets. However, the apparent reten
tion as higher ( P<0,05) in the CM diet than with SP60 diet.