摘要
研究相同配方成本下,不同加工工艺以及投喂策略对鲫鱼生长和消化率的影响。采用配方相同的挤压熟化料和硬颗粒料饲养鲫鱼,投喂挤压熟化饲料相对于颗粒饲料,鲫鱼特定生长率、蛋白质效率和饲料转化效率显著升高(P<0.05);增加投喂频率可提高鲫鱼对颗粒饲料的利用效率,并促进生长,但对挤压熟化饲料组生长没有显著影响,但提高了饲料的蛋白和能量消化率。对于平均初重为(64.38±0.18)g的鲫鱼,投喂3.5%挤压熟化饲料,每天投喂6次可达到最大生长率,但2.0%投喂率,每天投喂6次的挤压熟化饲料组,饲料系数最低。
Six hundred gibel carp （64.38 g ±0.18 g） were randomly assigned to 30 fibreglass tanks （ 100 L） according to a 2 × 3 × 2 experimental design [2 processing techniques： Extruded diet （E） vs. pelleted diet （P） ; 3 feeding levels： 2.0%, 3. 0% vs. 3.5% b.w. ; 2 feeding frequency： 3 times/d （3） vs. 6 times/day （6） , but the groups of 3.5% b. w of feeding level just took 6 times/day because of its high feeding level] with 3 replicates for each treatment. After 28 days, the fish fed E diets showed significantly higher specific growth rate （SGR）, protein efficiency ratio （PER） and feed conversion efficiency （FCE） than those of fish fed P diets （ p 〈 0.05）. Fish fed at 3.0% and 3.5% feeding level had significantly higher SGR than that of 2, 0% groups （ p 〈 0.05 ）, while there was no significant difference between 3.0% and 3.5% groups （ p 〉 0.05 ）. Higher feeding frequency increased fish SGR, PER and FCE of P groups, but no significant effects on E groups （ p 〈 0.05 ） ; The apparent digestibility coefficient of crude protein and energy of the E groups were significantly higher than those of the P groups when their feeding frequency was 3 times/day. Fish fed on E356 showed highest SGR and E206 group got lowest FCR for gibel carp （64.38 ±0.18g） .
出处
《渔业现代化》
2007年第5期43-46,共4页
Fishery Modernization
基金
国家科技支撑计划项目(2006BAD12B06
2006BAD12B08)
关键词
鲫鱼
挤压熟化
投喂频率
投喂率
生长性能
消化率
gibel carp （Carassius auratus gibelio）
extruded diet
feeding frequency
feeding level
growth performance
ap-parent digestibility coefficients
