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

Effects of Cadmium on Some Growth Parameters of Rice (oryza Sativa L.)

M. G. KIBRIA
Professor
Department of Soil Science, University of Chittagong, Chittagong-4331, Bangladesh.

K. T. OSMAN
Professor
Department of Soil Science, University of Chittagong, Chittagong-4331, Bangladesh.

M. J. AHMED
Professor
Department of Chemistry, University of Chittagong, Chittagong-4331, Bangladesh.

Abstract/ Executive Summary:

A pot experiment was conducted to study the response of rice (Oryza sativa L.) plants exposed to different concentrations of cadmium. Rice plants were grown on three different textured soils (clay loam, sandy clay loam, sandy loam) and treated with six levels (0, 1, 3, 5, 7, 9 mg kg-1) of cadmium. The effects of cadmium on agronomic parameters of rice plants were recorded. Plant growth was affected by the Cd treatments. Plant height, tiller and panicle numbers and grain yield were significantly reduced by the highest Cd treatment. A depressive effect of Cd on grain formation was observed. Dry matter yield (oven dried at 650 C) was reduced to 17-36% at the highest Cd treatment as compared to the control.

Keywords: Cadmium, Rice, Tiller number, Panicle number, Grain yield, Dry matter.

Location: Chittagong University

Start Date:

End Date:

Program Area: Crop-Soil-Water Management

Commodity: Rice

Objectives:

To investigate the effect of Cd on the growth and yield of rice.

Methodology:

A pot experiment was conducted to investigate the effects of Cd on some growth parameters of rice plant. Rice was grown on three different textured soils namely clay loam, sandy clay loam and sandy loam. Soils used in the experiment were collected from (i) agricultural field near new Science Faculty of Chittagong University (Clay loam soil), (ii) agricultural field near Shahid Minar of Chittagong University (Sandy clay loam soil) and (iii) Syedpara at Hathazari Upazilla under Chittagong district ( Sandy loam soil) from a depth of 0-15 cm on the basis of composite sampling method. Before collection for pot experiment, textural classes of the soils were determined. Soil samples were air dried, larger and massive aggregates were broken down by gentle crushing with wooden pluck. Dry roots, grasses and other particulate materials were removed from the soils and processed for pot experiment. A portion of the soils passed through 2.00 mm sieve was used for laboratory analyses. Eight kilograms soils were placed in each earthen pot. The treatments of Cd (0, 1, 3, 5, 7 and 9 mg kg-1 soil) were applied in soil in solution form as 3Cd(SO4)2.8H2O. Each treatment was replicated thrice and the pots were arranged in randomized block design. The doses of nitrogen (as Urea), P (as Triple super phosphate), K (as Muriate of potash) and S (as Zinc sulfate) were applied in the pot experiment (110 N, 25 P, 60 K, 15 S kg ha-1 soil). According to BARC (1997) recommendation, 1/3 N, and whole of P, K, S were applied during soil preparation. The second 1/3 N was applied at rapid tillering stage and the rest 1/3 N was applied as broadcast before 5-7 days of panicle initiation. Four seedlings of 30 days’ old and of uniform size of a high yielding rice variety, BR 29, were transplanted in each pot. The level of standing water at a height of 2.5 ±0.5 cm above the soil surface was maintained by periodic addition of tap water. Growth parameters such as plant height, tiller number were recorded at 70 days after transplantation (DAT) and panicle number, dry weight (straw and root) and grain yield at maturity. At maturity, rice plants were harvested just above the soil surface level and separated into straw and rice grain. Roots were collected carefully and washed thoroughly with tap water first to remove adhering soil particles and then with distilled water. The straws were also washed to remove dust particles. Root, straw and grains were oven dried at 650 C for 72 hours and weights were recorded. The experimental data were statistically analyzed. The significance of differences between the means of the treatments was evaluated by one way analysis of variance followed by Duncan’s Multiple Range Test at the significance level of 5%.

Source of Information: Chittagong Univ.J.Biol.Sci.,Vol. 1(1):21-27,2006

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

The study indicate that application of cadmium significantly reduced plant height, tiller and panicle numbers and grain yield. A depressive effect of Cd on grain formation was also observed.

Knowledge Management: Journal