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Nutrient Contents of Soils and Rubber Leves of Madhupur and Karnajhora Rubber Plantations

Md. Thouhidul Islam
Department of Soil Science, Govt, Fazilatunnesa Women's College, Bhola, Bangladesh.

Akhter Hossain Khan
Department of Soil, Water and Environment, University of Dhaka, Dhaka-I 000, Bangladesh.

Tofazzal Hussain Khan
Department of Soil, Water and Environment, University of Dhaka, Dhaka-I 000, Bangladesh.

Sirajul Hoque
Department of Soil, Water and Environment, University of Dhaka, Dhaka-I 000, Bangladesh.

Abstract/ Executive Summary:

Soils collected from the rubber plantations of Madhupur and Karnajhora rubber gardens were assessed to determine the nutrient contents of soil and leaf samples. The common limitations of Tejgaon, Belabo and Kulaura series to rubber plantation were pH and level of nutrients. The pH of the soil ranged between 4.7 and 6.3 and decreased with the increase in depth of all soils with few exceptions. The percentage of organic matter ranged between /.84 and 4.04% in the surface and between /./0 and 2.76% in the subsurface soils and total N content of the surface and subsurface soils varied from 0.06 to O. /2% and from 0.04 to 0.07 %, respectively. The organic matter, total N, C/N ratio, and available N contents of the topsoil were higher than the subsoil. The pH values were higher than the optimum values of pH for rubber plantations. The N, P, K, 5, Ca, Mg, Zn and Cu contents of the investigated soils were low except Fe and Mn. N, K and Mg contents of leaves were found lower in almost all plantations. But low to medium level P contents was found in the second whorls and Mn contents of rubber plants were found higher in all plantations. Topsoil N, P, K, 5, Ca, Mg, Fe, and Mn contents showed non-significant positive or negative correlation with the respective element content in second whorl except Cu content.

Keywords: Nutritional status, Soils, Rubber plantation

Location: Pirgacha, Chandpur, Santoshpur and Kamlapur rubber gardens under Madhupur plantations, situated in Tangail district and Karnojhora rubber garden, situated in Sherpur district.

Start Date:

End Date:

Program Area: Crop-Soil-Water Management

Commodity: Rubber wood

Objectives:

To determine the nutrient contents of soil and leaf samples.

Methodology:

Soil and leaf samples were collected from Pirgacha, Chandpur, Santoshpur and Kamlapur rubber gardens under Madhupur plantations, situated in Tangail district and Karnojhora rubber garden, situated in Sherpur district. Surface and subsurface soil samples and leaf (first and second whorl) samples were collected from the selected eighteen locations of rubber growing areas. Each sample was a composite sample of three sub- samples. The soil and leaf samples were put into polythene bags for transporting to the laboratory. Soil samples were air-dried, ground, sieved «2 mm & < 1 mm) and preserved in plastic bottles. The leaf samples were cleaned, washed and dried at 70°C for 48 hours and ground by using mechanical grinder. Method was used for particle size analysis and textural classes were determined. Soil pH (soil to water ratio of 1 : 2.5), organic carbon, total N content, 2M KCI extractable N was determined. Available soil P was determined by ascorbic acid blue colour method and available soil S was determined Available Ca, Mg and K in soils were extracted by I N neutral ammonium acetate solution and available Fe, Mn, Zn and Cu were extracted with Diethylenetriaminepentaacetic acid (DTPA) at pH 7.3. Then Ca, Mg. Fe, Mn, Zn and Cu were determined by Atomic Absorption Spectrophotometer and Kcontent was determined by using a Flame Photometer. Leaf samples were wet digested with nitric- perchloric acid (Piper 1950) for determination of total P, S, K, Ca, Mg, Fe, Mn, Zn and Cu and sulphuric-perchloric acid was used to digest leaf sample's to determine N. To determine N, P, S, K, Ca, Mg, Fe, Mn, Zn and Cu contents in the digests the above mentioned methods were followed.

Source of Information: Bangladesh J. Soil Sci. 31( 1-2): I-I I, 2005

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

It is clear from the above observation that pH of the soils of studied areas was not suitable for rubber plantation. The organic matter content of the soil was more or less satisfactory compared to the other soils of Bangladesh. It played an important role for the availability of N, P and S. It was found that S, Fe and Mn contents of the soils were satisfactory for the rubber plantation. But, other major as well as trace element contents of soil was lower than the nutrient required for normal growth of rubber plant. The concentrations of nutrient elements of the leaf samples in five plantation areas varied among different locations but no definite trend in change was observed with the age of plants. It can be concluded from the analyses that the nutrient contents of the soils and its availability are not suitable for rubber plantation.

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