摘要
The digestibility and voluntary intake of fibrous roughages and acorns was studied in six wild boar and five Meishan pigs. The neutral-detergent fibre (NDF) concentration of the diets ranged from 139 to 767 g/kg of the organic matter. Organic matter digestibility of acorns, mixed grass and wheat straw was higher in wild boar (P < 0·05) while voluntary food intake of the Meishan pigs was higher for mixed grass, hay and wheat straw (P < 0·05). Organic matter digestibility (P < 0·01) and NDF digestibility (P < 0·05) were both negatively related to NDF concentration of the diet. No relationship existed between voluntary food intake and NDF concentration of the diet. The apparent nitrogen (N) digestibility was positively related (P < 0·01) to dietary N while no relationship was found with dietary NDF. The negative effect of NDF on digestibility could only be partly explained by the lignin concentration of NDF. Much more important was the lower efficiency of the carbohydrate fermentation in the caecum and colon when compared with the direct absorption of glucose from the small intestine. It was estimated that digestible NDF at a maximum contributed proportionately 0·26 to the metabolizable energy intake of the animals. It was concluded that wild boar and domestic pigs should be able to maintain themselves on an all fresh grass diet when NDF concentration of the diet does not exceed about 550 g/kg and N concentration is not too low.
摘要译文
研究了六头野猪和五头眉山猪的纤维粗饲料和橡子的消化率和自愿摄入量。日粮的中性洗涤剂纤维（NDF）浓度范围为139至767 g / kg有机物。野猪的橡子，混草和麦草的有机物消化率较高（P <0·05），而草，干草和麦草的杂粮中，梅山猪的自愿食物摄入较高（P <0·05）。有机物消化率（P <0·01）和NDF消化率（P <0·05）均与日粮中NDF含量呈负相关。自愿进食与饮食中NDF的浓度之间没有关系。表观氮（N）消化率与日粮氮呈正相关（P <0·01），而与日粮NDF无相关性。 NDF对消化率的负面影响只能部分由NDF的木质素浓度来解释。与从小肠直接吸收葡萄糖相比，盲肠和结肠中碳水化合物的发酵效率较低，这一点更为重要。据估计，可消化的NDF最多对动物的可代谢能量摄入成比例地为0·26。结论是，当日粮中的NDF浓度不超过550 g / kg且N浓度不太低时，野猪和家猪应能够维持全新鲜草饮食。
S. E. van Wieren (a1). Digestibility and voluntary intake of roughages by wild boar and Meishan pigs[J]. Animal Science, 2000,71(1): 149-156