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Economics of Rice-fish Culture in Wet Land Rice Ecosystems

M. Hazrat Ali
Principal Scientific Officer
Rice Farming Systems Division, Bangladesh Rice Research Institute, Gazipur-1701, Bangladesh.

Lun G. Mateo
Professor
Department of Agriculture & Horticulture, Central Luzon State University, Science City of Munoz, Nueva Eciji, Philippines.

Abstract/ Executive Summary:

The study was conducted at the Central Experimental Station, Philippine Rice Research Institute, Maligaya, Science City of Munoz, Nueva Eciji, Philippines during season to assess the economic performance of different treatments with various depth of water in rice-fish culture in wet land rice ecosystems. The additional cost incurred ranging from 106.86 to 112.47% was due to excavation of pond refuge, making dikes, installation of net screen, fingerlings and supplementary fish feed. Despite such higher costs, all treatments with rice-fish produced higher net return than rice monoculture. The highest total return (P 94449.0/ha = U$ 2009/ha), gross margin (P 88449.00 = U$ 1965.53 and net income (P 38630.41/ha = U$ 2858/ha) were obtained from rice-fish culture at 11-15 cm depth of water which were statistically identical with total return and net come from results showed an increasing net income from 5 to 34.61%, but the highest increase (34.61%) in net income was from 11-15 cm water depth.

Keywords: Rice-fish culture, Economic analysis

Location: Central Experimental Station, Philippine Rice Research Institute.

Start Date: 01-01-2001

End Date: 31-12-2001

Program Area: Socio-economic and Policy

Non-commodity: Analysis and interpretations

Objectives:

To determine the economic performance of various treatments with different water depths in rice-fish culture under wetland rice ecosystems.

Methodology:

The experiment was conducted at the Central Experimental Station, Philippine Rice Research Institute, during dry season 2001. The soil of the experimental field was Maligaya clay loam. The sixes of the experimental plots were 11.6 m long and 10.6 m wide. The experimental plots were laid out in Randomized Complete Block Design having 5 treatments with 3 replications. The experiment was conducted with the treatments: (i) Ti= Rice alone at 5-10 cm water depth (Control), (ii) T2= Rice-fish at 5-10 cm water depth, (iii) T3- Rice-fish at 11-15 cm water depth, (iv) T3- Rice-fish at 16-20 cm water depth and (v) T5- Rice-fish at 21-25 cm water depth. Dikes with base width of 50 cm, top width of 30-40 cm and height of 40-50 cm were constructed in each plot to supply adequate water for each treatment. A pond refuge covering 10% of total land area of each plot having 1 m deep was excavated and connected with one end of all rice plots, except the control plot. Each of the plots (except control) was provided with separated screen for water inlets and outlets. PSB (Philippine Seed Board) Rc. 66, a high yielding lowland rice variety was transplanted with twenty-nine old day seedlings using 2 seedlings/hill. Conventional methods of cultural practices were made. Water depth of 3-5 cm was maintained during first week of transplanting and increased as required by the treatments when fingerlings were released. Water level was monitored everyday and irrigation made to maintain the stated water depth for the treatments. Fingerlings of Nile tilapia (Orechromis niloticus) or GIFT (Genetically Improved Farmed Tilapia) were released @ 10000/ha at 11 days after rice transplanting (DAT). Supplementary feed was applied two times in a day (1/2 at 7-8 a.m. and ½ at 4-5 p.m.) based on 10% of fish body weight. Fish was reared for 79 days. Water was drained out just before the fish harvest. Rice was also harvested at the same day of fish harvest.

Source of Information: SAARC JOURNAL OF AGRICULTURE, Vol. 5, Issue 2, 2007, pp. 01-06, ISSN 1682-8348, SAARC Agricultural Information Centre.

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

The results of the present study suggested that total rice yield per plot decreased because of 10% land was used for excavation of pond refuge. Despite the reduction of gross rice yield the economic analysis suggested that the integration of fish in rice systems irrespective of treatments produced higher economic benefit than the conventional rice monoculture. This would contribute better livelihood of rice farmers in the Philippines and in other rice growing countries.

Knowledge Management: Journal