Abstract
ABSTRACTThe effects of Allzyme SSF supplementation of sweet potato vine meal (SPVM) on the performance of growing pigs were investigated. A control diet based on fish meal and full-fat soybean as protein sources and diets containing 150 and 300 g/kg of SPVM with and without SSF were fed each to pigs in five replicates pens in a completely randomized design for a period of 84 days. There was no treatment effect (P > .05) on dry matter intake. The highest body weight gain was recorded on the SSF- supplemented SPVM groups (P < .05) and the lowest (P < .05) on the SPVM-based diets without enzyme. Dressing percentage and P2 back fat thickness were not affected by dietary treatment (P > .05), but per cent ham was markedly reduced on the control compared with the enzyme-supplemented SPVM diets (P < .05). The relative weight of digesta in the stomach and small intestine was not affected by the diet (P > .05). Allzyme supplementation significantly reduced digesta weight in the large intestine (P < .05) even at 30% dietary SPVM. It was concluded that supplementation of the diet with Allzyme SSF will improve the utilization of up to 30% SPVM by grower pigs, reduce cost of pork production and add value to this by-product.
Highlights
Pork is among the most relished meats in the South Pacific region, but its supply is constrained by the high cost of feed ingredients
A control diet based on fish meal and full-fat soybean as protein sources and diets containing 150 and 300 g/kg of sweet potato vine meal (SPVM) with and without SSF were fed each to pigs in five replicates pens in a completely randomized design for a period of 84 days
The present study evaluated SPVM with and without Allzyme SSF®, an enzyme product with seven enzyme activities for growing pigs
Summary
Pork is among the most relished meats in the South Pacific region, but its supply is constrained by the high cost of feed ingredients. Conventional feed ingredients (energy and protein sources) are very expensive in the region. This calls for more research into the feeding value of locally available feed materials. Sweet potato leaves and vines are moderate to good sources of protein ranging from 26% to 33% (Woolfe 1992; Dung 2001; An et al 2003) with the protein having a good amino acid composition (Ishida et al 2000; NCR 2012) but high in fibre content (Teguia et al 1997; Ly et al 2010). The leaves and vines from sweet potato harvest have limited use in the South Pacific region. SPVM was analysed for proximate composition, amino acid profile and nonstarch polysaccharide (NSP) content (Table 1)
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