豆粕和土豆蛋白替代饲料中鱼粉对异育银鲫生长及能量收支的影响

利用全能量收支同步测定呼吸仪系统测定了三种不同蛋白源(鱼粉、豆粕、土豆蛋白)饲料对银鲫生长及能量收支各组分的影响。对照饲料全部以鱼粉为蛋白源，另两种饲料中30％的蛋白质分别来自豆粕和土豆蛋白。试验结果表明，银鲫对三种蛋白源的饲料的摄食率，食物转化效率均有显差异，以鱼粉组最高，豆粕其次，土豆蛋白最低。能量收支各组分也均有显差异，能量收支式如下：鱼粉88．1C=13．77F 2．95U 24．1G 41．8R 豆粕 102．3C=17．1F 2．8U 16．4G 55．4R土豆蛋白105．5C=14．9F 1．3U 14．4G 67．4R式中C、F、U、G、R分别代表摄食能、排粪能、排泄能、生长能、代谢能。

EFFECT OF REPLACEMENT OF FISH MEAL BY SOYBEAN MEAL AND POTATO PROTEIN CONCENTRATE IN THE DIET FOR GIBEL CARP ON GROWTH AND ENERGY BUDGET

Three protein sources: fish meal, soybean meal and potato protein concentrate were tested to investigate the effects of replacement of fish meal in the diets on the growth and energy budget of gibel carp (Carassius auratus gibelio) in a respirometer system in which feed intake (C), faecal production (F), metabolism (R) and growth (G) could be simultaneously measured over the entire experimental period. Fish meal was used as the control protein, in the other two test diets, 30% protein was replaced by soybean meal protein and potato protein. Specific growth rate (SGR), food conversion efficiency (FCE) was significantly higher for fish meal group, and then the soybean meal group, the potato protein group was the lowest. The proportion of energy intake allocated to each channel also showed significant differences and could be expressed as follows: Fishmeal: 88.1C=13.77F+2.95U+24.1G+41.8R Soybean meal: 102.3C=17.1F+2.8U+16.4G+55.4R Potato protein: 105.5C=14.9F+1.3U+14.4G+67.4R