title: Effect of sweet potato vines on performance parameters and some carcass characteristics of rabbits.
abstract: Conventional feedstuffs in Brazil are expensive, which has led to the search for less conventional cheaper and locally available feedstuffs. Thus, this study was carried out to determine the dietary effect of dry sweet potato vines (SPV) on the performance and some carcass characteristics of rabbits. A total of twenty-seven weaned White New Zealand rabbits (14 male and 13 female) 35 days old with an average initial weight of 755 g were allocated into three treatments. Nine rabbits were assigned to each treatment in a completely randomized design. Three diets were formulated to similar protein and energy levels: 0SPV - diet without inclusion of dry sweet potato vines; 10SPV - diet with 10% alfalfa hay replaced by dry sweet potato vines; and 15SPV - diet with 15% of alfalfa hay replaced by dry sweet potato vines. The experiment lasted for 49 days during which data for feed intake and body weight were recorded. The daily feed intake ranged from 73.17 to 78.02 g; daily weight gain from 22.32 to 23.17 g; feed conversion ratio (FCR) from 3.16 to 3.49 and final live weight ranged from 1839.44 to 1880.55 g. None of the evaluated performance parameters as well as carcass weight, heart weight and percentages of fat and protein in meat were significantly affected by any of the tested dietary treatments. However, the liver weight was statistically lower in animals fed the diets containing 10% of SPV, mainly due to lower glucose content. Glycogen within the tissue, did not differ significantly among treatments. It was therefore concluded that up to 15% of SPV can successfully be included in the diet of rabbits as a cheaper replacement for alfalfa hay without adversely affecting performance.
authors.affiliation: Universidade Federal de Santa Maria, Santa Maria, Rio Grande do Sul, Brazil.
authors.forename: A C K
authors.initials: ACK
authors.lastname: Klinger
authors.affiliation: Universidade Federal de Santa Maria, Santa Maria, Rio Grande do Sul, Brazil.
authors.forename: L P
authors.initials: LP
authors.lastname: da Silva
authors.affiliation: Universidade Federal de Santa Maria, Santa Maria, Rio Grande do Sul, Brazil.
authors.forename: G S P
authors.initials: GSP
authors.lastname: de Toledo
authors.affiliation: Universidade Federal de Santa Maria, Santa Maria, Rio Grande do Sul, Brazil.
authors.forename: B
authors.initials: B
authors.lastname: Galarreta
authors.affiliation: Department of Animal Science, Federal University of Santa Maria Santa Maria, Rio Grande do Sul, Brazil.
authors.forename: F
authors.identifier: http://orcid.org/0000-0001-6096-0132
authors.initials: F
authors.lastname: Goulart
mesh_terms: D000821:Animal Feed / Q000032:analysis*; D000824:Animal Nutritional Physiological Phenomena; D000818:Animals; D001823:Body Composition; D004032:Diet / Q000662:veterinary*; D005260:Female; D027723:Ipomoea batatas; D008297:Male; D018547:Plant Stems; D011817:Rabbits
keywords: animal nutrition; by-products; rabbit farming