Han Xuefeng, Chen Chaoxi, Zhang Xiaoli, Wei Yuqing, Tang Shaoxun, Wang Jiurong, Tan Zhiliang, Xu Liwei
Key Laboratory for Agro-Ecological Processes in Subtropical Region, National Engineering Laboratory forPollution Control and Waste Utilization in Livestock and Poultry Production, South-Central ExperimentalStation of Animal Nutrition and Feed Science in Ministry of Agriculture, Hunan Provincial EngineeringResearch Center for Healthy Livestock and Poultry Production, Institute of Subtropical Agriculture, TheChinese Academy of Sciences (CAS), Changsha 410125, China.
College of Life Science and Technology, Southwest University for Nationalities, Chengdu 610041, China.
Animals (Basel). 2019 Jan 23;9(2):32. doi: 10.3390/ani9020032.
The objective of this study was to evaluate the effects of dietary inclusion of tevioside on feed intake, feeding behavior, nutrient digestion, rumen fermentation, and serum biochemical parameters in goats. Nine male Xiangdong black goats (21.8 ± 1.5 kg of body weight) were used in a replicated 3 × 3 Latin square. All goats were fed a basal diet including concentrate and forage (chopped rice traw). The three treatments were 0, 400, or 800 mg stevioside per kg chopped rice traw on a dry matter (DM) basis. Dry matter intake of forage and total diet linearly increased ( = 0.03 and = 0.04) with increasing stevioside in the diet. There was no effect ( > 0.05) of stevioside inclusion in the diets on eating time, rumination time, or total mastication time for the goats. Total volatile fatty acid (VFA) concentration in the rumen responded quadratically ( < 0.01), decreasing from 0 to 400 mg/kg stevioside inclusion and increasing thereafter. The inclusion of steviosid in the diets promoted a quadratic increase in the apparent total tract digestibilities of neutral detergent fiber (NDF) ( = 0.02) and acid detergent fiber (ADF) ( = 0.01). Based on the results of this experiment, it could be concluded that supplementing goat diets with stevioside at 400 mg/kg to 800 mg/kg forage (about 270 to 541 mg/kg diet) resulted in increased dry intake of forage and total diet, suggesting that stevioside has positive potential as a feed additive to improve feed intake.
本研究的目的是评估日粮中添加甜菊糖苷对山羊采食量、采食行为、养分消化、瘤胃发酵和血清生化参数的影响。选用9只湘东黑山羊公羊（体重21.8±1.5千克），采用重复3×3拉丁方设计。所有山羊均饲喂由精料和粗饲料（碎米秸）组成的基础日粮。三个处理组分别在每千克碎米秸干物质（DM）中添加0、400或800毫克甜菊糖苷。随着日粮中甜菊糖苷含量的增加，粗饲料和总日粮的干物质采食量呈线性增加（P = 0.03和P = 0.04）。日粮中添加甜菊糖苷对山羊的采食时间、反刍时间或总咀嚼时间没有影响（P>0.05）。瘤胃中总挥发性脂肪酸（VFA）浓度呈二次响应（P<0.01），在甜菊糖苷添加量从0增加到400毫克/千克时降低，此后升高。日粮中添加甜菊糖苷使中性洗涤纤维（NDF）（P = 0.02）和酸性洗涤纤维（ADF）（P = 0.01）的表观全肠道消化率呈二次增加。基于本实验结果，可以得出结论，在山羊日粮中添加400毫克/千克至800毫克/千克的甜菊糖苷（约占日粮的270至541毫克/千克）可增加粗饲料和总日粮的干物质摄入量，表明甜菊糖苷作为饲料添加剂具有提高采食量的积极潜力。
