Yield of Tomato Irrigated with Recirculating Aquacultural Water

摘要: Aquacultural water, which rapidly accumulates organic materials that inhibit fish growth, has considerable potential for hydroponic cultivation of vegetable plants. By recirculating aquacultural water through sand biofilters, it is possible to integrate the two systems whereby both benefit: vegetables are provided with nutrient-laden and they control ammonia concentrations in medium. Hybrid tilapia [Oreochromis mossambicus (Peters) × O. niloticus (L.)] tomato (Lycopersicon esculentum Mill.) production were linked a closed system polyethylene greenhouse determine effect tank-to-biofilter ratio on yield. The raised tanks fed 32% protein feed. Tomatoes ‘Laura’ ‘Kewalo’ grown biofilters during summer 1988 spring 1989, respectively. Plant spacing was 4 plants/sq yd each bed irrigated eight times daily from associated tank. Biofilter drainage returned tank by gravity. Four (v/v) ratios (1:0.67, 1:1.00, 1:1.50, 1:2.25) studied plant populations proportional biofilter volume. Each received equivalent nutrients (even though size number plants differed) equal water. Biological filtration, aeration, mineral assimilation maintained quality growth. Yield per decreased increasing volume but total yield increased Fruit unit feed input biomass increase highly correlated. From these studies, balanced high per-plant observed 1:1.5 ratio. operated efficiently so fruit successful. Research QuestionRecirculating accumulate This can also aid controlling nitrate practical application such integrated fish-vegetable need investigation. study determined how influenced nutrient input. Literature SummaryHydroponic been shown be effective removing recirculatory systems. Reciprocating alternately flood drain, provide uniform distribution within filtration Optimum between rate, standing biomass, volume, must established. Study DescriptionTilapia Raleigh, NC. while tomatoes (cultivars ‘Kewalo’) flooded drained (Fig. 1). Applied QuestionWhat system? 2, 3). To maximize production, necessary gives our appeared balance appropriately. Fig. 1Schematic diagram aquaculture-olericulture system. 2Fruit tomato, corresponding increase, as 3Fruit