加州鲈对15种饲料原料体外消化率的测定

Apparent digestibilities of 15 feedstuffs in vitro for largemouth bass(Micropterus salmoides)

采用"胃-肠"两步法测定了加州鲈(Micropterus salmoides)对15种饲料原料的体外消化率,并与银鲈(Bidyanus bidyanus)体内消化率数据进行了比较。结果表明:加州鲈对秘鲁鱼粉、喷干血粉、豆粕、花生麸、玉米蛋白粉、酵母膏、破壁酵母7种原料的体外消化率较高(干物质>45%,蛋白质>71%),对玉米、DDGS消化率较低(干物质<17%,蛋白质<61%),且大部分原料的体内、外消化率结果具有极显著的相关性(P<0.01)。体外消化率的结果可为加州鲈饲料原料的选择提供参考依据。

digestibilities of 15 feedstuffs in vitro for largemouth bass （Micropterus salmoides） were determined by stomach-intestine two-step method and the results were compared with apparent di- gestibilities in vivo for silver perch （Bidyanus bidyanus）. The results showed that, the apparent di- gestibilities of peruvian fishmeal, spray-dried blood meal, soybean meal, peanut residue, corn gluten meal, yeast extract and wall-broken yeast extract in vitro were higher （dry matter digestibilities 〉45% and crude protein digestibilities 〉71%）, while that of corn and DDGS was relatively lower（dry matter di- gestibilities 〈17% and crude protein digestibilities 〈61%）, and significant correlations were found be- tween apparent digestibilities for most of the detected feedstuffs in vitro and in vivo （P〈0.01）. The re- sults of digestibility in vitro can be regarded as a reference in feedstuff choosing for largemouth bass.