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标题：Evaluation of Nitrogen and Phosphorus Wastes Produced by Nile Tilapia (Oreochromis niloticus L.) Fed Azolla-Diets in Earthen Ponds
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作者：Youssouf Abou ; Aliou Saidou ; Daouda Mama 等
期刊名称：Journal of Environmental Protection
印刷版ISSN：2152-2197
电子版ISSN：2152-2219
出版年度：2012
卷号：3
期号：6
页码：502-507
DOI：10.4236/jep.2012.36060
出版社：Scientific Research Publishing
摘要：Nitrogen (N) and phosphorus (P) wastes produced by Nile tilapia Oreochromis niloticus L. fed Azolla, an aquatic atmospheric nitrogen fixing fern, was evaluated for 90 days in pond experiment. Six isonitrogenous (29.2% crude protein) and isoenergetic (16.9 Kj·g^–1) diets A₀, A₁₀, A₂₀, A₃₀, A₄₀ and A₅₀, containing 0%, 10%, 20%, 30%, 40% and 50% of Azolla meal (AM) respectively, as partial fishmeal (FM) substitutes, was provided to experimental fish. The Azolla-free diet A₀ served as a control. Fish specific growth rate (SGR) was higher with the control diet, the lower values being obtained in A50-fed fish (P Azolla could be used in diet to sustain Nile tilapia growth and as “environmentally-friendly” ingredient to limit P loss, while providing N to the field, beneficially in tropical marshland pond where this nutrient is already limiting.
关键词：Azolla; Aquaculture; Environment; Fish Meal Replacement; Oreochromis niloticus; Nitrogen; Phosphorus; Nutrient Balance