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Variation in Water and Soil Characteristics Within a Production Cycle in an Alternate Shrimp-paddy Cultivation Plot in Khulna, Coastal Bangladesh

Muhammad Abdur Rouf*
Fisheries and Marine Resource Technology Discipline, Khulna University, Khulna 9208, Bangladesh

S.M. Masud Karim
Fisheries and Marine Resource Technology Discipline, Khulna University, Khulna 9208, Bangladesh

A.F.M. Hasanuzzaman
Fisheries and Marine Resource Technology Discipline, Khulna University, Khulna 9208, Bangladesh

Khandoker Qudrata Kibria
Soil Science Discipline, Khulna University, Khulna 9208, Bangladesh

Md. Ayaz Hasan Chisty
Fisheries and Marine Resource Technology Discipline, Khulna University, Khulna 9208, Bangladesh

Abstract/ Executive Summary:

A six months study was carried out in an alternate shrimp paddy cultivation plot situated in Khulna District, Bangladesh. Na, Ca, K, Fe, P, S, NH4+-N, NO3—N, pH 8.09, Electric Conductivity (EC), redox potential (Eh) and organic carbon content in soil and water from the plot was investigated at monthly interval. P, Na, K, Fe, NH4+-N, NO3- -N, EC and Eh were increased with the progress of paddy-shrimp culture but Ca and S decreased. pH was decreased gradually in water but it was increased in soil. No significant monthly variation of the parameters, except Fe in water and Ca and NO3-N in soil was observed indicating that alternate shrimp-paddy cultivation had no significant influence on the soil and water in cultivated areas.

Keywords: Nutrient, Land use management, Coastal region, Shrimp culture, Water, Soil

Location: In Khulna, Coastal Bangladesh

Start Date:

End Date:

Program Area: Crop-Soil-Water Management

Commodity: Cropping System, Shrimp, Rice

Objectives:

The present study was undertaken in an alternate paddy-shrimp culture plot to know the availability and trend of Na, K, P, Fe, S, NH3-N, NO3-N, pH, EC, Eh in soil and water and organic C in soil during the course of shrimp culture.

Methodology:

The study was conducted from January to June 2004 in a 1.42 ha land at Kathaltola village under Dumuria Upazila of Khulna District, Bangladesh. The land was used for shrimp and paddy cultivation alternately- paddy was cultivated during October-January and for shrimp during February-July.

Each soil sample was a homogenous mixture of soils collected from 8 to 10 different places of the selected plot. Water samples were collected from surface layer of the water body. Water and soil samples were collected in plastic jars and poly bags respectively. All the samples were preserved at the Laboratory of Fisheries and Marine Resource Technology, Khulna University prior to analyses. Various standard methods were used in measuring selected water and soil parameters. Data were presented in tables and analyses (one-way ANOVA) performed with SPSS-12 software.

Source of Information: Khulna University Studies, 8(2): 221-230, 2007

Article Link (Online Journal):

Funding Source:

Budget:

Total Budget (Tk.) :

Achievement/Findings:

The nutrient loads increased with the progress in shrimp culture except inconsistent sulfur and calcium for both soils and water. However, liming seems to have major influence in changing the water and soil parameters. It was revealed that most of the water parameters were associated with pH and Eh whereas soil parameters are associated with pH and EC. The trend of different parameters for water and soil found in the present work could be used to develop a primary model for a sustainable shrimp-paddy cultivation system.

Knowledge Management: Journal