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Characterization of Rainfed Aman Rice Growing Environment

Md.Shahjahan Kabir
SSO
Agricultural Statistics Division, BRRI, Gazipur

DR. D.N.R. Poul
CSO and Head
Agricultural Statistics Division, BRRI, Gazipur

Abstract/ Executive Summary:

Map created to delineate different suitability level for growing rainfed T. Aman in Bangladesh is presented as Map 2. Most of the crop growing area in Bangladesh is favorable or moderately suitable for growing Rainfed T. Aman. and is distributed almost all over Bangladesh. The most favorable environment for growing rainfed T. Aman is located in the greater Mymensingh, Comilla, Noakhali, Bogra and Dinajpur districts. There are some pocket areas in the southern and south-western part of the country and south-western part of Sylhet region. The map produced is a provisional one that needs to be fine tuned including additional information on rainfall and other weather factors, performance of T. Aman varieties in different locations of Bangladesh, flooding and other biotice and abotic factor contributing positively or negatively to rice yield. Socio-economc information of rice growing farmers should also be included in the preparation of the suitability map characteriztion of rainfed rice environment.

Keywords: Rainfed T.Aman, Suitability map, Soil parameter and ArcView

Location: All District of Bangladesh

Start Date: 30-06-2002

End Date: 31-12-2004

Program Area: Socio-economic and Policy

Non-commodity: Rice, Classification

Objectives:

This study was undertaken to create rainfed T.Aman suitability map for Bangladesh

Methodology:

Input maps for the study were the general soil map of AEZ database and the drought map in Bangladesh Country Almanac (BCA) database. To characterize the rianfed T. Aman area the following parameters were used. • Soil physical parameters • Drought Soil physical properties are by far the most important for growing crops. For rainfed T. Aman , the important soil parameters considered were : Land type, Top soil texture, Slope, Drainage, Moisture, Permeability and Salinity. The soil parameter values were scaled following Thana Nirdeshika of SRDI. These were weighed according to their importance in relation to T. Aman cultivation under rainfed environment. Secondary information and experts’ opinion were considered in determining the weights. ArcView 2.1 was used for geo-classification of rice growing area and for creating the maps. For each of these physical parameters individual grid theme were constructed to use as input themes of the suitability model.

Source of Information: BRRI Annual Report 2003-2004

Article Link (Online Journal):

Funding Source:

1. Government

Budget: 200000

Total Budget (Tk.) : 200000

Achievement/Findings:

It might be concluded that, majority of the rainfed T.Aman area falls under favorable or moderately suitable growing environment located almost allover the country. The most favorable rainfed T. Aman environment is located in the greater Mymensingh, Comilla, Noakhali, Bogra and Dinajpur districts.

Knowledge Management: Report/Proceedings