摘要
Exploring and evaluating alternative feed ingredients to be used in swine diet is essential due to highly variable cost and limited availability of conventional feed ingredients. Tubers and agro-industrial coproducts could provide the basis for producing affordable swine feed. However, information on the nutritional value of these potential alternative feedstuffs is necessary while considering their use in swine feeding program. Four tubers (purple sweet potato [PSP], okinawan sweet potato, taro and cassava) and 3 coproducts (okara, wheat millrun [WMR] and barley brewers grain [BBG]) were analyzed for their proximate nutrients, starch, fibers and gross energy (GE) content. Two independent in vitro studies were carried out for tubers and coproducts to determine their nutrients digestibility using a 3-step enzymatic assay (which mimics the digestion occurring in the gastrointestinal tract of swine) with 9 replicates of each sample digested in 3 batches equally. All replicate samples were used to determine in vitro dry matter digestibility (IVDDM) while 2 replicates from each batch were used to determine in vitro GE digestibility (IVDGE). Among tubers, CP content was the highest in taro (8.8%) and the lowest in cassava (3.7%), while CP content among coproducts was the highest in okara (22.7%) and the lowest in WMR (11.8%). Ether extract content among tubers ranged from 1.1% to 2.8%. The GE content among tubers, ranged from 4,134 to 4,334 kcal/kg whereas among coproducts it ranged from 4,270 to 4,794 kcal/kg. Among tubers, IVDDM for PSP was significantly higher (86.8%, P < 0.001) than taro (70.3%). Among coproducts, IVDDM of okara (74.1%) was significantly higher (P < 0.05) than BBG (61.3%). In conclusion, both tubers and coproducts can be used as a partial substitute of conventional energy feedstuffs in swine diets as these are rich in GE and other nutrients and are fairly digestible.
摘要译文
探索和评估在猪饮食中使用的替代饲料成分是必不可少的，因为成本高，常规饲料成分有限豆腐和农业工业副产品可为生产经济实惠的猪饲料提供依据。然而，关于这些潜在替代饲料的营养价值的信息是必要的，同时考虑它们在猪饲养计划中的使用。块茎（紫薯）分析冈底甘薯，芋头和木薯）和3种副产品（豆渣，小麦粉和大麦酿造谷物[BBG]）的近邻营养物质，淀粉，纤维和总能源（GE）含量使用3步酶测定（其模拟猪的胃肠道中消化）的继代营养物消化率，每批3批同时消化的每个样品9次重复所有重复样品用于确定体外干物质消化率（IVDDM），而每批使用2次重复测定体外GE消化率（IVDGE） 块茎，芋头（8 5），木薯（3 5）中CP含量最高， ara while while（（（（（（（（（（（（（（（ 块茎之间的醚提取物含量范围为1〜5〜2 among块茎之间的GE含量范围为4,134〜4334千卡/公斤，而副产物的含量范围为4,270〜4,794千卡/千克在块茎中，PSP的IVDDM显着高于芋头（70 5） （86 5，P 0 ） Among副产品，豆蔻IVDDM（74 5）显着较高（P 0 比BBG（61 5） 总而言之，块茎和副产物可用作猪饮食中常规能量饲料的部分替代品，因为它们富含GE和其他营养物质并且是相当可消化的
Utsav P. Tiwari; Rajesh Jha. Nutrient profile and digestibility of tubers and agro-industrial coproducts determined using an in vitro model of swine[J]. Animal Nutrition, 2016,2(4): 357–360