Klinger A C K, da Silva L P, de Toledo G S P, Galarreta B, Goulart F
Universidade Federal de Santa Maria, Santa Maria, Rio Grande do Sul, Brazil.
Department of Animal Science, Federal University of Santa Maria Santa Maria, Rio Grande do Sul, Brazil.
J Anim Physiol Anim Nutr (Berl). 2018 Feb;102(1):152-156. doi: 10.1111/jpn.12672. Epub 2017 Jan 13.
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.
巴西的传统饲料价格昂贵，这促使人们寻找不太传统但更便宜且当地可获取的饲料。因此，本研究旨在确定干红薯藤（SPV）日粮对兔子生长性能和一些胴体特征的影响。总共27只35日龄断奶的新西兰白兔（14只雄性和13只雌性），平均初始体重755克，被分为三个处理组。采用完全随机设计，每个处理组分配9只兔子。配制了三种蛋白质和能量水平相似的日粮：0SPV - 不包含干红薯藤的日粮；10SPV - 用干红薯藤替代10%苜蓿干草的日粮；15SPV - 用干红薯藤替代15%苜蓿干草的日粮。实验持续49天，在此期间记录采食量和体重数据。日采食量在73.17至78.02克之间；日增重在22.32至23.17克之间；饲料转化率（FCR）在3.16至3.49之间，最终活重在1839.44至1880.55克之间。任何一种受试日粮处理对所评估的生长性能参数以及胴体重、心脏重量和肉中脂肪及蛋白质百分比均无显著影响。然而，饲喂含1110%SPV日粮的动物肝脏重量在统计学上较低，主要是由于葡萄糖含量较低。各处理组之间组织内糖原含量无显著差异。因此得出结论，高达15%的SPV可成功纳入兔子日粮中，作为苜蓿干草的廉价替代品，且不会对生长性能产生不利影响。
