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Growth and Yield of T. Aman Rice as Affected by Variety and Seedling Number

J. A. Mahmud
Lecturer
Department of Agroforestry and Environmental Science, Sher-e-Bangla Agricultural University, Dhaka-1207

A. M. M. Shamsuzzaman
Professor
Department of Agricultural Botany, Sher-e-Bangla Agricultural University, Dhaka-1207

M. M. Haque
Associate professor
Department of Agricultural Botany, Sher-e-Bangla Agricultural University, Dhaka-1207

M. M. Islam
Associate professor
Department of Agricultural Botany, Sher-e-Bangla Agricultural University, Dhaka-1207

Abstract/ Executive Summary:

A field experiment was conducted at the experimental field of Sher-e-Bangla Agricultural University during July to December 2010 to find out the effect of 1, 2 or 3 seedling(s) per hill^-1on growth, yield and yield components of a modern inbred (BRRI dhan49) and four hybrid (BRRI hybrid dhan2, Heera2, Tia and Aloron) transplant Aman rice varieties. The experiment was laid out in randomized complete block design with four replications. Results showed that rice cultivars differed significantly in some characters at different growth stages, such as, tillers number, total dry matter weight, unfilled grain, grain filling percentage and insignificantly in some characters at different growth stage, such as, chlorophyll content, yield etc due to different seedling densities per hill. Numerically the higher grain yield was attributed mainly to the number of effective tillers per hill, filled grains per panicle and 1000-grain weight. Remarkable grain and straw yield were found from the interaction of BRRI dhan49 planted 1 seedling and 3 seedlings per hill respectively. Among the hybrid rice varieties, the maximum grain yield was observed from the combination of BRRI hybrid dhan2 with 1 seedling per hill (V₂S₁).

Keywords: Transplant aman rice, Seedling density, Grain yield

Location: Experimental field of Sher-e-Bangla Agricultural University

Start Date: 00-07-2010

End Date: 00-12-2010

Program Area: Variety and Species

Commodity: Rice

Objectives:

To find out the effect of 1, 2 or 3 seedling(s) per hill^-1on growth, yield and yield components of rice varieties.

Methodology:

The field experiment was conducted at the research farm of Sher-e-Bangla Agricultural University (SAU), Dhaka in Aman season of 2010 (July to December, 2010). The experiment was laid out in randomized complete block design with four replications using BRRI dhan49 and four hybrid varieties, viz. BRRI hybrid dhan2, Heera, Tia and Aloron. The size of unit plot was 5 m x 5 m. Thirty days old seedlings were transplanted maintaining 25 cm x 15 cm spacing. At the time of first ploughing, cowdung was applied at the rate of 10 t ha^-1. The crop was fertilized @ 115-26-60-12-4 kg/ha of NPKSZn, in the form of urea, triple superphosphate (TSP), muriate of potash (MoP), gypsum and zinc sulphate respectively according to BRRI. The entire amounts of TSP, MoP, gypsum and zinc sulphate were applied at the time of final land preparation as basal dose. Urea was top-dressed in three equal splits at 10, 30 and 50 days after transplanting (DAT). Intercultural operations were done as and when necessary. Ten hills in each plot were randomly selected and tagged for recording tillering data. Total dry matter at panicle initiation, booting, flowering and maturity stages were collected from randomly selected 10 hills in each stage leaving the harvest area. Data on yield components viz. grains m^-2, percent filled grains, and 1000-grain weights were also recorded. An area of 6 m2 was harvested from centre of each plot and the grain and straw yield as well as harvest index were computed. Flag leaf chlorophyll content was determined. All the data were statistically analyzed using the computer package program, MSTAT-C. The mean differences among the treatments were compared by least significant difference (LSD) test at 5% level of significance.

Source of Information: J. Sher-e-Bangla Agric. Univ., 5(2): 23-29, 2011

Article Link (Online Journal):

Funding Source:

1. Government

Budget:

Total Budget (Tk.) :

Achievement/Findings:

Transplanting 1 seedling hill^-1 for modern variety of transplant Aman cv. BRRI dhan49 will be a promising practice for good yield than the hybrid rice varieties (BRRI hybrid dhan2, Heera2, Tia and Aloron) in Aman season. However, to reach a specific conclusion and recommendation, more research work on modern and hybrid rice varieties with different seedling densities hill-1 should be done over different Agro-ecological zones.

Knowledge Management: Journal