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Improving Soil, Water and Productivity of Gher Fishery

A.F.M. Shofiquzzoha
Scientific Officer
Brackishwater Station, Bangladesh Fisheries Research Institute, Paikgacha, Khulna

Kh. Mazhabuddin
Scientific Officer
Brackishwater Station, Bangladesh Fisheries Research Institute, Paikgacha, Khulna

Abstract/ Executive Summary:

Wide variations in physico-chemical properties of Ghers in selective three locations as well as yearly variations in the same location was observed. Production of the Ghers in three locations for the 1st year (considered as base year) of experiment were between 121.65 and 173.36 kg/ha increased rapidly in the 2nd year 220.15 and 255.45 kg/ha, similarly in the 3rd year, it was between 186.76 and 415.35 kg/ha. In the 3rd year, Shyamnagar showed its reducing production due to shortfall of natural water and subsequent mortality. The production for the experimental period found significant (p>0.05). The soil properties of Ghers showed apparent variations during the experimental period. In the experiment, it was observed that, in a same Gher, on spot soil and dry soil that analyzed in the laboratory were varied in pH reactions. Data reveals that, regarding soil-water and productivity, an area based management practices can uphold the present production level of Ghers to a great extent despite major variation in environmental factors.

Keywords: Soil, Water, Productivity, Shrimp, Brackishwater

Location: Paikgacha, Khulna

Start Date: 01-07-2002

End Date: 30-06-2003

Program Area: Animal Health and Management

Commodity: Shrimp

Objectives:

To develop a soil and water management method of shrimps Gher to increase yield and to maintain sustainability of production; to study the physico-chemical characteristics of soil and water of Gher; to investigate the relationship between water quality, nutrient availability and the dynamics of shrimp/fish culture; to study the biological (plankton and benthic) factors of the Gher

Methodology:

Ghers were selected in Shyamnagar upazila under Satkhira districts, Paikgacha upazila under Khulna district and Rampal upazila under Bagerhat district. Ghers were randomly selected depended on salinity level of nearby rivers and on the soil type (considering the nature of agro-ecological zones). The physico-chemical characteristics of soil and water of Ghers were studied both in field and laboratory condition. Thus soil and water quality parameters samples from the selective Ghers were periodically analyzed. Management practices adopted by farmers (during Gher preparation, stocking, feeding, water management etc.) were also studied.

Source of Information: Annual Research Program 2002-03. BFRI, Mymensingh.

Article Link (Online Journal):

Funding Source:

1. Government

Budget: One lakh

Total Budget (Tk.) : One lakh

Achievement/Findings:

The shrimp culture environment encompasses a wide variety of parameters, particularly state of soil, water and their productivity, which are essential for growth and production of shrimp and fishes. So, determination and optimization of each factor for desired performance of particular species of without damaging the nature be of paramount importance. Therefore, to increase the present production rate of shrimp through improving the soil, water and management practices and to conserve the environment the specific condition of Gher viz., state of soil, water, their productivity and relevant environmental factors were taken into consideration.

Knowledge Management: Report/Proceedings