تأثیر افزودن ویتامینC به آب در یک سازگان توأم ماهی قزل آلای رنگین کمان (Oncorhynchus mykiss) و گیاه کاهو (Lactuca sativa) و بررسی عملکردی رشد گیاه و ماهی

نوع مقاله : زیست شناسی (جانوری)

نویسندگان

گروه شیلات، دانشکده منابع طبیعی، دانشگاه تهران، کرج، ایران

چکیده

به­ منظور بررسی اثر افزودن ویتامین C به آب و تاثیر آن بر شاخص ­های رشد و ایمنی در قزل ­آلای رنگین ­کمان (Oncorhynchus mykiss)­ و گیاه کاهو(Lactuca sativa)، در یک سازگان توأم ماهی و گیاه ، تعداد 90 قطعه ماهی قزل­ آلای رنگین ­کمان 1/5±45/00 گرمی و 260 عدد نشا کاهو به­ شکل کاملاً تصادفی به 9 واحد آزمایشی وارد شدند. تیمارها تحت تأثیر­ 0،­ 15 ­ و ­30 میلی ­گرم در لیتر ویتامین C به مدت 60­ روز قرار گرفتند.­ درصد افزایش وزن و نرخ رشد ویژه، نرخ تبدیل غذایی و نرخ کارایی پروتئین در تیمار 30 میلی گرم ویتامین C، اختلاف معنی­ داری را در انتهای دوره آزمایش در مقایسه با سایر تیمار­ها نشان داد (0/05>P). شاخص ­های رشد گیاه کاهو از قبیل طول برگ، عرض برگ، طول بوته، وزن­ تر بوته، وزن خشک بوته، طول ریشه و وزن خشک ریشه در بین تیمار­ها فاقد تفاوت معنی ­دار بود (0/05<P) اما شاخص وزن تر ریشه گیاه کاهو دارای تفاوت معنی ­دار بود (0/05>P). اندازه ­گیری شاخص ­های بیوشیمیایی خون ماهی نیز نشان داد با افزایش سطح 15 میلی­ گرم ویتامین C در هر لیتر، بیش ترین غلظت متوسط هموگلوبین داخل گلبول قرمز (MCHCبه­ مقدار 0/73± 34/13 گرم بر دسی ­لیتر خون ماهی را نشان می ­دهد که این مقدارنسبت به تیمارهای دیگر معنی ­دار بود.­ سایر شاخص ­های خونی از قبیل هماتوکریت (Hct)­، حجم متوسط گلبولی­ (MCV)،­ هموگلوبین­ (HGB)، ­تعداد گلبول­ های قرمز ­(RBC)­ و میانگین هموگلوبین گلبولی­ (MCH) فاقد تفاوت معنی ­دار بودند ­(0/05<P). ­نتایج این آزمایش نشان داد با افزودن 15­ تا ­30 میلی ­گرم بر لیتر ویتامین C به آب، مقدار غلظت متوسط هموگلوبین داخل گلبول قرمز (MCHC)در خون ماهی تغییر می­ کند و رشد ماهی و گیاه نیز بیش ­تر می­ شود.

کلیدواژه‌ها


عنوان مقاله [English]

Effect of increasing vitamin C to water in a combined rainbow trout (Oncorhynchus mykiss) and lettuce (Lactuca sativa), and a functional study of plant and fish growth indices

نویسندگان [English]

  • Erfan Salamroodi
  • Gholamreza Rafiee
  • Kamran Rezaei tavabe
Department of Fisheries, Faculty of Natural Resources, University of Tehran, Karaj, Iran
چکیده [English]

In order to investigate the effects of different levels of vitamin C in water on rainbow trout (Oncorhynchus mykiss) and lettuce plant (Lactuca sativa) growth indices in an aquaponics system, 90 rainbow trout fishes and 260 seedlings of lettuce were randomly introduced into 9 experimental unites. Treatments were affected by increasing the vitamin C concentration of 0, 15 and 30 mg per liter of water for 60 days. Growth indices of fish showed significant differences (P<0.05) among treatments at the end of experiment. Lettuce growth indices such as leaf length, leaf width, plant height, fresh weight of plant, dry weight of plant, root length and root dry weight were not significant (P≥0.05), but the root fresh weight showed a significant difference between treatments (P <0.05). Biochemical parameters of blood showed significant differences in treatment with 15 mg of vitamin per liter of water compared to other treatments, the highest mean concentration of red blood cells (MCHC) in hemoglobin recorded, 34.13 ± 0.73 g / dl in this treatment as well. Other blood indices such as hematocrit (Hct), Mean Corpuscular Volume )MCV(, hemoglobin (HGB), red blood cell count (RBC) and mean corpuscular hemoglobin (MCH) were not significantly different (P≥0.05) among treatments. It was indicated that adding 15 to 30 mg L-1 of Vitamin C to water, have a positive effect on the biological conditions of the plant and fish in an aquaponic culture of rainbow trout and lettuce.

کلیدواژه‌ها [English]

  • Vitamin C
  • Lettuce plant
  • rainbow trout
  • Freshwater fish
  • Aquaponics
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