Nutrient Dynamics, Growth of Fish (Labeo rohita) and Plant (Spinach) in Aquaponics System
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Date
2014
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MPUAT, Udaipur
Abstract
The present investigation was carried out in rectangular cement tank (9’ x 9’ x 3’) filled with 2500 liter water and stocked with 200, 400, 600 and 800 numbers of fingerlings designated as T1, T2, T3 and T4 respectively. A control without any fish was run simultaneously for comparison. Experiment was runwith three replication for a periods of 60 days. The nutrient harvesting and growth of fish (L. rohita) as well as plant (Spinach) were studied.
The fortnightly growth of fingerlings indicated highest growth in terms of weight gain (802 g) in T4in second fortnight. The percent gain in body weight was highest in T1 with 36.24 percent in the same fortnight. The food conversion ratio (FCR) was lowest (0.3303) and the specific growth rate was highest (2.06 %) in T1 in same fortnight. The highest growth was seen in T1 (with lowest stocking density of 200 Nos. of fingerlings) in the second fortnights.
The total (cumulative) growth (weight gain) was highest (2906 g) in T4for a period of 60 days. The percent gain in weight and per day growth in percent body weight were 144.4 percent and 2.40 percent respectively. The FCR was lowest (1.125 g) and the SGR was highest (5.946 %) in T1. The results thus indicate highest percent growth of fingerlings for 60 days period in T1.
The plant (Spinach) growth (production) was highest (175g) in T4 having highest stocking density of fish fingerlings showing high nutrient load followed by T3, T2, control and T1 with158, 137, 60 and 75 g respectively.The Spinach production was not significantly different between control & T1 as well as between T2&T3 and T3& T4. There was significant positive correlation between plant growth and NH4-N.
The results indicate significant effect of stocking density of fish on nutrient release and plant growth in aquaponics system.
Description
Nutrient Dynamics, Growth of Fish (Labeo rohita) and Plant (Spinach) in Aquaponics System
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Citation
Raosaheb and Sharma, 2014