| 摘要: |
| 本实验模拟池塘养殖环境, 对吉富品系尼罗罗非鱼(Oreochromis niloticus)幼鱼实用日粮中添加蔗糖糖蜜的养殖效果以及对水质影响进行了研究。试验设计了6种等氮(34.8%)、等能量(16.4MJ/kg)的试验日粮, 对照组日粮为20%小麦次粉, 试验组1—5按20%—100%比例添加蔗糖糖蜜替代日粮中小麦次粉。试验结果表明, 实验结束时(56d), 各实验组鱼成活率为100%, 当日粮中蔗糖糖蜜替代80%次粉及以下时, 其摄食量和特定生长率与对照组鱼无显著性差异, 但当日粮中蔗糖糖蜜完全替代次粉时, 这两种指标显著下降(P<0.05)。当日粮中蔗糖糖蜜替代40%次粉以下时, 试验组鱼饲料效率、鱼体近似成分、肝体指数与主要水质指标与对照组无显著性差异(P>0.05)。本实验认为, 在池塘养殖环境下, 吉富品系尼罗罗非幼鱼实用日粮中蔗糖糖蜜可以替代40%及以下的次粉, 即蔗糖糖蜜在配合饲料中添加量不宜高于8%。 |
| 关键词: 吉富品系尼罗罗非鱼 日粮 蔗糖糖蜜 池塘 养殖 |
| DOI：10.11693/hyhz201306033 |
| 分类号: |
| 基金项目:广西科技厅攻关项目资助, 122201-3 号。 |
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QIN Zhi-Biao, PENG Qi, WU Bin, WANG Fei, FENG Jian
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Institute of Aquaculture, Guangxi University
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| Abstract: |
| The effect of practical diet’s sugarcane molasses on aquaculture performance in GIFT Nile tilapia (Oreochromis niloticus) Juvenile under simulated pond environment was researched in this paper. Six isonitrogenous (34.8%) and isoenergetic (16.4MJ/kg) formulated diets were designed in which the control group contained 20% wheat middling (WM) in diet and WM were replaced by sugarcane molasses (SM) progressively with the level of 20%, 40%, 60%, 80% and 100% as test groups 1, 2, 3, 4 and 5, respectively. Each diet was fed to 90 fish [(6.6±0.1)g; mean±SE] for 56 days in
triplicate cement pools, random arranged in pools of an outdoor with simulated pond environment system. The experimental results showed that no significant difference with feed intake (FI) and specific growth rate (SGR) was found among the fish in control group and test group 1—4 (P>0.05), but the both indexes of fish in test group 5 were lower than fish in control group significantly (P<0.05). Otherwise, no significant difference with feed effectiveness rate, approximate composition of carcass, viscerasomatic indices and main indexes of water quality in ponds was found among the fish in control group and test group 1—2 (P>0.05). The experiment results consider that under the simulation environment in the pond farming, 40% WM in practice diet of GIFT Nile tilapia juvenile could be replaced by SM, namely allowed additive amount of SM in practice diet should be ≤8%. |
| Key words: Oreochromis niloticus diet sugarcane molasses pond aquaculture |
