Performance Efficiency of Selected Medium Culture and Raft Systems for Waste Removal in a Small-Scale Aquaponics Production System

IF 1.9 4区 农林科学 Q2 FISHERIES
Robert Nesta Kagali, Mary A. Opiyo, Kevin Omollo Mbogo, Kenneth Omondi Ogila
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Abstract

Aquaponics systems integrate aquaculture and hydroponics to create a sustainable method for food production by recycling nutrients. However, nutrient waste management in aquaponics systems remains a challenge, particularly in achieving optimal growth for both fish and plants while minimizing environmental impacts. This study compared the effectiveness of raft and selected medium culture systems in removing waste from a small-scale aquaponics production system that included leafy vegetable crops (Brassica oleracea) and Nile tilapia (Oreochromis niloticus). The aquaponics systems comprised of four hydroponics systems: three media based (charcoal, perlite, and pumice) and one raft system in a completely randomized design. The crops were cultivated in the hydroponic units, while O. niloticus fingerlings were reared in the fish tanks for 22 weeks. To compare the various hydroponics systems, growth metrics for the fish (weight and length) and plants growth parameters such as leaf index and biomass, as well as nutrient analysis were monitored and documented. Physicochemical parameters of the culture water were also monitored. Fish grown in the perlite medium had significantly higher mean final length and weight compared to other aquaponics setups in the study (p < 0.05). Plants grown on pumice had significantly more total biomass than other media (p < 0.05) and had the highest crude protein (CP) content, while those planted on perlite had the highest crude lipid content (p < 0.05). The charcoal medium was the most effective, lowering total ammonia nitrogen (TAN) levels by up to 67.1%. Pumice showed the highest total suspended solids (TSSs) retention capacity (p < 0.05), resulting in a 25.9% drop in TSS levels. The raft system was the least effective at reducing aquaculture nutrient waste. This study demonstrated that the choice of hydroponics media is important in optimizing aquaponics systems for both plant and fish growth.

Abstract Image

在小规模水培生产系统中选定的培养基和筏式系统去除废物的性能效率
水培系统将水产养殖和水培结合起来,通过循环利用营养物质,创造出一种可持续的粮食生产方法。然而,鱼共生系统中的营养废物管理仍然是一个挑战,特别是在实现鱼类和植物的最佳生长同时最大限度地减少对环境的影响方面。本研究比较了筏式和选定培养基培养系统在清除包括叶菜作物(甘蓝)和尼罗罗非鱼(Oreochromis niloticus)在内的小规模水培生产系统中的废物方面的有效性。水培系统由四个水培系统组成:三个基于介质(木炭,珍珠岩和浮石)和一个完全随机设计的木筏系统。作物在水培单元中栽培,niloticus鱼种在鱼缸中饲养22周。为了比较不同的水培系统,对鱼的生长指标(体重和长度)和植物的生长参数(如叶片指数和生物量)以及营养分析进行了监测和记录。同时对培养水的理化参数进行了监测。与研究中的其他水培装置相比,在珍珠岩培养基中生长的鱼的平均最终长度和重量明显更高(p <;0.05)。浮石上生长的植物总生物量显著高于其他介质(p <;粗蛋白质(CP)含量最高,而粗脂肪含量最高(p <;0.05)。木炭培养基最有效,可降低总氨氮(TAN)水平达67.1%。浮石表现出最高的总悬浮固体(TSSs)截留能力(p <;0.05),导致TSS水平下降25.9%。筏式系统在减少水产养殖养分浪费方面效果最差。本研究表明,水培培养基的选择对于优化植物和鱼类生长的水培系统至关重要。
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来源期刊
Aquaculture Research
Aquaculture Research 农林科学-渔业
CiteScore
4.60
自引率
5.00%
发文量
464
审稿时长
5.3 months
期刊介绍: International in perspective, Aquaculture Research is published 12 times a year and specifically addresses research and reference needs of all working and studying within the many varied areas of aquaculture. The Journal regularly publishes papers on applied or scientific research relevant to freshwater, brackish, and marine aquaculture. It covers all aquatic organisms, floristic and faunistic, related directly or indirectly to human consumption. The journal also includes review articles, short communications and technical papers. Young scientists are particularly encouraged to submit short communications based on their own research.
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