The Effect of Natural Zeolite (Clinoptiolite) on Aquaponic Production of Red Tilapia (Oreochromis sp.) and Lettuce (Lactuca sativa var. longifolia), and Improvement of Water Quality
محل انتشار: مجله علوم و فناوری کشاورزی، دوره: 8، شماره: 4
سال انتشار: 1385
نوع سند: مقاله ژورنالی
زبان: انگلیسی
مشاهده: 61
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شناسه ملی سند علمی:
JR_JASTMO-8-4_005
تاریخ نمایه سازی: 22 آبان 1402
چکیده مقاله:
The effects of natural zeolite as a bed medium in increasing lettuce and red tilapia growth as well as improvement of water quality parameters in an aquaponic system were investigated. An experiment with a completely randomized design was run with two treatments in triplicates, ۱) an aquaponic system without use of zeolite as a control group and ۲) use of a small cotton bag, containing ۱۰ g zeolite as a bed medium for planting a lettuce seedling. In each experimental unit, ۴۲ seedlings of lettuce were introduced. The individual weight of fish and lettuce yield in treatment ۲ was significantly higher (P< ۰.۰۵) than treatment ۱ at the end of experiment. The initial mean individual weight of red tila-pia juveniles was ۶.۲۳ ± ۰.۰۶ g and increased to ۳۲.۵۰ ± ۲.۰۰ and ۳۷.۵۰ ± ۲.۲۰ in treat-ments ۱ and ۲, respectively by the end of experiment. The yield of lettuce was higher in treatment ۲ (۱۵۰۷ ± ۴۴۵.۰۰ g/unit) compared to the control (۲۷۵ ± ۸۳ g/unit). The concen-tration of total ammonia-N in the water was significantly lower (P< ۰.۰۵) in treatment ۲ compared to treatment ۱ at the end of experiment. The concentration of phosphorous and potassium in the fish rearing tanks was significantly lower (P< ۰.۰۵) in treatment ۲. These results indicated that the use of zeolite, as a bed medium to plant lettuce seedlings in a re-circulating aquaponic system could increase the growth of lettuce seedlings as well as im-proving water quality parameters.
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