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

  • سال انتشار: 1385
  • محل انتشار: مجله علوم و فناوری کشاورزی، دوره: 8، شماره: 4
  • کد COI اختصاصی: JR_JASTMO-8-4_005
  • زبان مقاله: انگلیسی
  • تعداد مشاهده: 64
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نویسندگان

G. Rafiee

Department of Fishery and Environmental Sciences, Faculty of Natural Resources, University of Tehran, P. O. Box: ۳۱۵۸۵-۴۳۱۴, Karaj, Islamic Republic of Iran.

Che Saad

Department of Agrotechnology, Faculty of Agriculture, University of Putra Malaysia, Serdang, Selangor, Malaysia.

چکیده

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.

کلیدواژه ها

Aquaponic system, Diet, Lettuce, Red tilapia, Water quality, Zeolite

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