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Determination of the Smallest Plot Size for Estimating Plant Characters and Yield of Transplanted Rice

M S Kabir
Senior Scientific Oflieer
Agril. Statistics Division , BRRI

D N R Paul
Chief Scientific Oflicer
Agril. Statistics Division , BRRI

M Howlader
Principal Scientific Officer
Agril. Statistics Division , BRRI

M R Zaman
Lccturcr
Statistics Department, Chittagong Universuty.

Abstract/ Executive Summary:

Quality of the field experiments data dependent upon adequate experimental design. This study investigated the smallest plot size for estimating different plant characters and yield of transplanted rice. The experiment was conducted in Boro 2000-01 and Boro 2001-02 as two-factor factorial experiment in a randomized complete block (RCB) design with three replications. Factor I is the plot size with three level s: 1- x I - m, 2 - x 2-m and 3- x 3-m and fact o r 2 is the cultural management. BRRI dhan29 with spacing 20- x 20-cm was cultivated and plant height, tiller number, panicle length , numbers of filled and unfilled grain, spikelet/ panicle, I000-grain weight and yield data were collected. Results indicate that for field experiment s with rice, the experimental plots ma y be made as small as 1-x 1-m for estimating the plant characters except yield. If yield is of primary importance, the plot size should not be smaller than 4 m²

Keywords: Determination, Plot size, Yield, Transplanted rice

Location: BRRI, Gazipur

Start Date: 00-00-2000

End Date: 00-00-2002

Program Area: Crop-Soil-Water Management

Commodity: Rice

Objectives:

To determine the smallest plot size for estimating different plant characters and yield of transplanted rice

Methodology:

The experiment was conducted in Boro 2000-0I and Boro 2001-02 as two-factor factorial experiment in a randomized complete block design with three replications. In Boro 2001-02, experiment was conducted only for the confirmation of yield result of Boro 2000-0I. Factor I is the plot size (harvest area) with three levels: 1- x I m, 2- x 2 m and 3- x 3 m and factor 2 is the cultural management with two levels: method I and method 2. Method I is the conventional method where all cultural operations such as weeding, fertilizer and insecticide applications were performed entered into the plots and in method 2, all those cultural operations were performed from bamboo poles placed over the plots to avoid possible damage or physical shocks to plants due to foot pressing. All these operations were done very carefully such that every portion of each plot could receive uniform treatment.The variety was BRRl dhan29 and spacing was 20- x 20 cm. Each plot had two extra rows of plants as boarders. Plant height , tiller number, panicle length, numbers of filled and unfilled grain, spikelet /panicle, 1000-grain weight and yield data were collected.

Source of Information: Bangladesh Rice J.12 (I&2): 115-117,2007

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

Results indicate that for field experiments with rice, the experimental plots may be made as small as 1-x 1-m for estimating the plant characters except yield. If yield is of primary importance, the plot size should not be smaller than 4 m²

Knowledge Management: Journal