团头鲂（Megalobrama amblyocephala Yih）对12种饲料原料消化率和可消化能的测定↑（*）

本实验以三氧化二铬为指示剂测定了一冬龄团头鲂（ＭｅｇａｌｏｂｒａｍａａｍｂｌｙｏｃｅｐｈａｌａＹｉｈ）对１２种饲料原料的干物质、粗蛋白质、粗脂肪、无氮浸出物、总磷和总能量的表观消化率，首次报道了总磷消化率和可消化能。从表观消化率和可消化能的角度评价了１２种饲料原料的营养价值，为开发适于团头鲂的人工配合饲料提供了科学依据。

APPARENT DIGESTIBILITY AND DIGESTIBLE ENERGY OF 12FEEDSTUFFS FOR BLUNTNOSE BLACK BREAM(MEGALOBRAMA AMBLYCEPHALA YIH)

Apparent digestibilitv coefficients were determined for 12 feedstuffs in for-mulated diets with chromic oxide as an indicator for yearling bluntnose black bream(Megalobrama amblycephala Yih),using a reference diet and test diets composed of 70% reference diet and 30 % test ingredient.The total phosphorus digestibility and digestible energy of the 12 ingredients were first reported for bluntnose black bream.The dry mat-ter digestibility,the crude protein digestibility and the digestible energy value for soybean meal were 77.6%,95.7% and 16.0KJ/g,respectively,approaching or more than those of animal ingredients(yielded virtually 64.2-85.8%,83.9-93.2% and 13.9-21.0 KJ/g).However,other plant feedstuffs yielded 29.5-61.0% digestible dry matter,74.9-88.2% di-gestible crude protein and 6.42-14.1 KJ/g digestible energy.The NFE digestibility for the 7 plant ingredients tested ranged from 23.4% to 74.4%.The 12 ingredients had crude fat digestibility coefficients greater than 83%.Both animal and plant ingredients had low-er digestible phosphorus.The experimental results in connection with digestibility and di-gestible energy will provide reference data for the evaluation of nutritive valus of the 12 ingredients,and can greatly facilitate the formulation of effective low-cost feeds for pond-raised bluntnose black bream by allowing use of plant feedstuffs as protein sources.