Digestibility, nitrogen retention, gut environment and visceral organ size in Moo Lath and Large White growing pigs fed un-fermented and fermented cassava root pulp and soybean pulp

Abstract

The apparent total tract digestibility (ATTD), nitrogen retention, gut environment and gut organ size was studied in Moo Lath (ML) and Large White (LW) growing pigs fed un-fermented and fermented cassava root pulp and soybean pulp. The experiment was arranged according to a 2 × 4 factorial design with two breeds (ML and LW pigs) and four diets (UCLP, FCMP, SPMP and SPHP). Diet UCLP was a low-protein diet with un-fermented cassava root pulp, diet FCMP was a medium-protein diet with fermented cassava root pulp, diet SPMP was a medium-protein diet with soybean pulp and diet SPHP was a high-protein diet with soybean pulp. A total of 32 pigs (16 ML and 16 LW), aged 2 months old were allocated to metabolism cages throughout 12 days comprising 7 days for adaptation and 5 days for data collection. All diets were fed ad libitum. Dry matter intake (DMI) was higher in LW than in ML pigs, and DMI was higher in diets SPMP and SPHP than in diets UCLP and FCMP. The ATTD of organic matter (OM) and crude protein (CP) did not differ between breeds. The ATTD of OM was highest on diet SPHP followed by diet SPMP and diets FCMP and UCLP. The ATTD of CP was highest on diet SPHP and lowest on diet UCLP with diets FCMP and SPMP being intermediate. Nitrogen (N) retention (g/day and % of N intake) differed between breeds, while N retention expressed as a proportion of N digested was similar between breeds. N retention (g/day and % of N intake) was highest in diet SPHP followed in descending order by diets SPMP, FCMP and UCLP. In contrast, N retention expressed as a proportion of N digested was highest in diet FCMP followed in descending order by diets SPHP, SPMP and UCLP. Empty stomach weight (g/kg body weight) was higher in ML than in LW pigs, while empty caecum weight (g/kg body weight), length (cm/kg body weight) of small intestine, caecum, colon + rectum and total intestinal length were greater for LW than ML pigs. In conclusion, fermenting cassava root pulp with a commercial yeast-product, rice bran and urea increased the CP content and improved the N digestibility and N retention in both ML and LW pigs. Moreover, N utilization (N retention in % of N digested) on the diet with fermented cassava root pulp was comparable to the diets supplemented with soybean pulp.

Keywords

Fermentation; Gut environment; Nitrogen balance; Yeast

Published in

Livestock Research For Rural Development
2018, volume: 30, number: 1, article number: 4
Publisher: Fundacion CIPAV

SLU Authors

• Lindberg, Jan Erik

  • Department of Applied Animal Science and Welfare, Swedish University of Agricultural Sciences
    

• Ivarsson, Emma

  • Department of Applied Animal Science and Welfare, Swedish University of Agricultural Sciences
    

UKÄ Subject classification

Animal and Dairy Science

Permanent link to this page (URI)

https://res.slu.se/id/publ/130268