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Forty piglets weaned at 21 days old (20 barrows and 20 females), were individually allotted to a completely randomized experimental block design with five treatments (diets) and 8 replications each. The experimental treatments were fed in three different phases according to the animal age. In the pre-initial phase 1 (21 to 35 days of age): corn-soybean meal diet, diet with 15% DWM, diet with 15% DWM + 3,5% HPIMS, diet with 15% DWM + 5% IPS, diet with 15% DWM + 5% HPCCY. In the phase pre-initial 2 (36 to 49 days of age) a corn-soybean meal diet was maintained and DWM was reduced to 7.5% in all diets, HPIMS to 1.5%; IPS to 4% and HPCCY was maintained in 5%. In the phase initial (50 a 70 days of age) was maintained the corn-soybean based diet, DWM was removed of all the diets and the animals that received the treatments with DWM and DWM + HPIMS in the phases pre-initial 1 and 2, they were fed corn-soybean meal diet, IPS was reduced to 3% and HPCCY to 2.5%.
In the period from 21 to 35 days, the diet DWM + IPS provided the highest daily weight gain and better feed conversion. In the following phases, no differences were observed on performance parameters among diets. Up to five days post weaning, pigs fed SM and DWM + IPS showed the lower diarrhoea index. Additionally, the levels of serum urea were not affected by the experimental treatment.
The use of hydrolyzed proteins of intestinal mucosa, yeast and isolated soybean protein in complex diets containing dried whole milk may be taken into account as alternatives protein sources for piglet diets.
AJ Scandolera, MC Thomaz, RN Kronka, FEL Budiño, AL Fraga, RAR Huaynate, US Ruiz, and J. Cristani 2008. Revista Brasileira de Zootecnia, v.37, n.4, p.653-659.
