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Growth and Production of Nile Tilapia (oreochromis Niloticus Lin.) in Irrigated Boro Rice Under Floodplain Environment

M. Hazrat Ali
Rice Farming Systems Division, Bangladesh Rice Rsearch Instituie, Gazipur 1701, Bangladesh

Nur-E-Elahi
Rice Farming Systems Division, Bangladesh Rice Rsearch Instituie, Gazipur 1701, Bangladesh

S.B. Naseem
Rice Farming Systems Division, Bangladesh Rice Rsearch Instituie, Gazipur 1701, Bangladesh

A. Latif Shah
Soil Science Division, BRRI Regional Station, Habiganj 3300, Bangladesh

Abstract/ Executive Summary:

The experiment was conducted at BRRI Regional Station, Habiganj during 1994-95 to evaluate the growth and economic performance of Nile tilapia, Oreochromis nilotictus. fish reared in the field of irrigated boro rice with different fertilizer levels. Grain yield of rice was not affected by fish culture. It was observed that fifty percent of recommended fertilizer was enough to produce increased rice yield (8-10 t/ha) at floodplain environment and additional yield was obtained with the increasing fertilizer rates. Results further indicated that 0. niloticus could successfully be reared in the field of irrigated boro rice with recommended fertilizer level. Larger size of fingerlings at release had improved recovery percent, body weight gain and higher fish yield. Results also revealed that rice + fish production system produced higher net return than the system with rice alone.

Keywords: Nile tilapia, Rice-fish farming, Floodplain

Location: BRRI Regional Station, Habiganj

Start Date: 00-00-1994

End Date: 00-00-1995

Program Area: Farming System

Commodity: Tilapia

Objectives:

To determine the bio-economic performance of Nile tilapia species with different fertilizer levels under floodplain environment

Methodology:

The experiment was conducted at the farm of BRRI Regional Station, Habiganj situated in floodplain environment, during boro season 1994-95. The experimental plots were laid out in Randomized Complete Block Design with 3 Replications each having different fertilizer treatments, i) 0-0-0, ii) 40-30-20 and iii) 80-60-40 kg N-P₂0₅ - K₂O /ha. The plots size were 20m x 15 m. Plots were levelled to maintain uniform water depth in the plot. The border of the individual plots were raised to 50 cm high and 50 cm wide to prevent fingerlings movement from one plot to the other. In addition, 75 cm wide and 50 cm deep drains were made at the two sides of each plots for fingerlings to take shelter at the time of splits application of N and weeding for rice. This drain helped fingerlings survive for few days when the irrigation pump broke down. Half of N and all P₂0₅ and K₂O were applied before the final land preparation. Forty five and 40-day old seedlings were transplanted on February 11, 1994 and February 01, 1995 respectively. Fingerlings of Nile tilapia (1 fingerling/m²) were released 2-weeks after (Feb. 25, 1994 and Feb. 15, 1995) boro transplanting in both the years. Rest half of N was applied at 25 days after transplanting (DAT) followed by weeding. Except for the time of weeding and fertilizer application (only for top dressing) about 10-15 cm water depth was maintained throughout the rice growing period. Fish was harvested on June 03, 1994 and June 05, 1995 respectively before the harvest of boro rice for both the years. Data of fish and rice were recorded for comparing the bioeconomic performance of the different studied parameters.

Source of Information: Bangladesh J. Fish. Res., 3(1): 19-23, 1999

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

The results of two years study revealed that in the floodplain environment Nile tilapia could be reared successfully in the irrigated boro rice field without sacrificing rice yield. This rice-fish systems provide a great source of protein and add additional income to the farmers. Results also suggests that larger size of fingerlings at stocking release could increase the recovery percentage and body weight gain and higher fish yield and consequently higher net return. The rice-fish production systems if practiced with careful management would make much needed protein easily available to the resource poor farmers and would raise their income, as well.

Knowledge Management: Journal