Agricultural Research Management Information System

Home
Research Summary
Search
About Us
- ARMIS
- Brochure
Contact Us
Report
User Request
Data Input
Help
- Operation Manual
  - PDF
  - Video
- Program Area & Commodity
We have reached 37600 number of research entries at this moment.

- Logout

Research Detail

Home
Research
Detail

Some Aspects of Physico-chemical Properties of Bottom Soil of a Pond Located Atjahangirnagar University Campus

S. Pavel
Department of Zoology, Jahangirnagar University, Savar, Dhaka

M. R. Nabi
Department of Zoology, Jahangirnagar University, Savar, Dhaka

M. T. Ezaz
Department of Zoology, Jahangirnagar University, Savar, Dhaka

Abstract/ Executive Summary:

Analysis of some aspects of physico-chemical properties of a pond bottom soil of Jahangirnagar University campus was done from January to December of 1996. The study reveals that the soil was clay to loamy and was composed of 29.425% sand, 38.075% clay and 32.50% silt. The CEC was recorded as 13.74 meq/100g. Different physico-chemical properties of soil i.e., pH, OC, avail-N, avail-P and Exg.-Ca were determined and were found to vary from 6.3 to 7.2, 0.52 to 0.78%, 9.5 to 13.00 ppm, 6.25 to 18.50 ppm and 65.85 to 94.35 mg/100g of soil respectively. The observations of the present study indicate that the experimental pond was in a favourable condition for fish culture.

Keywords: Physico-chemical properties, Pond, Bottom soil

Location: Jahangirnagar University, Savar, Dhaka

Start Date: 00-01-1996

End Date: 00-12-1996

Program Area: Crop-Soil-Water Management

Commodity: Land development productivity

Objectives:

To evaluate the physico-chemical properties of soil as it has immense effect on the productivity of culture ponds.

Methodology:

The tenure of the work was one year, i.e. from January to December, 1996. General characteristics of the selected pond are shown in the study. The bottom soil from the selected pond was collected with the help of 'Ekman dredge' and the physico-chemical parameters were analyzed by applying the following methods: Physical parameters, Mechanical analysis, Chemical parameters, Soil hydrogen ion concentration (pH), Organic carbon (OC), Available Nitrogen, Available phosphorus (Avial.-P), Exchangeable calcium (Exg.-Ca), Cation Exchange capacity (CEC). Soil temperature was taken by a centigrade thermometer and consequently the colour of the soil was observed by naked eyes. The mechanical parameter . i.e., the textural status of the soil was hydrometrically determined. Chemical parameters of bottom soil were analyzed from the wet samples and the moisture content of soil was determined by gravimetric method (through drying the wet soil overnight in an oven at 105°C). Sampling was done once in a month and after each sampling following chemical parameters of the bottom soil were studied: The soil pH was determined in soil- water suspension (ratio 1:2.5) by using a "Griffin glass electrod pH meter (model 40). The organic carbon of soil was determined volumetrically by wet oxidation method. Organic matter in soil was estimated by multiplying the value of OC with Van Bemmelen factor (1.724). Available nitrogen of soil was determined according to "Devarda's alloy reduction method". Ammonical nitrogen (NH₄+N) was Physico-chemistry of bottom soil 61 also determined following the same procedure without adding "Devarda's alloy". Nitrate nitrogen (NO₃^-N) value of bottom soil was estimated by subtracting the value of ammoniacal nitrogen from the value of available nitrogen. Available phosphorus of soil was determined by "Ascorbic acid blue colorimetric method". Spectrophotometric determination was done by "Chemita visible spectrophotometer" with the wave length of 882 nm. The extraction for the analysis was prepared by following the method of Bray and Kurtz and the colour. The value of available phosphorus (H₂PO₄, HPO₄^- and PO₄=ions) was converted to orthophosphate (P₂O₅) by the multiplication of the conversion factor 2.2915. Exchangeable calcium (Exg.-Ca): Exg.-Ca was determined by "Coming flame photometer" on the normal ammonium acetate extract and comparing with the respective standard curve. The cation exchange capacity of soil was determined by following the method. The value was expressed in milli equivalent per hundred grams of soil (meq/100g of soil).

Source of Information: Bangladesh Journal of Life Science, June 1997, Vol.9(2), pp:59-66, ISSN:1023-0858.

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

The present findings, in respect of CEC the investigated pond respond as high class. Boyd (1982) investigating on mud of Albama ponds recorded CEC values varied from 0.5 to 26 meq/100g. Although according to him muds with a high proportion of sand have low CEC value while muds with high proportions of organic matter or clay have higher values for CEC which supports the clay loam type soil texture of the present investigated pond. As soil plays an important role in determining the fertility of fish ponds and since the studied pond provided optimum values for most of the physico-chemical factors, a satisfactory fish production could be achieved by following proper management strategy. The observations of the present study indicate that the experimental pond was in a favourable condition for fish culture.

Knowledge Management: Journal