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A Study of Dry Mass Production and Yield in Cowpea

Md. Mainul Islam Chudhury
Department of Crop Botany Bangladesh Agricultural University, Mymensingh.

Abstract/ Executive Summary:

A study was conducted at the field laboratory of the Department of Crop Botany, Bangladesh Agricultural University, Mymensingh, (24'ry5'N and 90°50longitude) between December, 1999 and May, 2000. The experiment was conducted with 5 genotypes of cowpea with the aim of investigating canopy structures, dry mass (DM) production and its allocation, and their relationships with yield, and yield attributes under field condition. Results revealed that there were genetic variations in shoot and root canopy structures, and flower and DM production. Number of pods/plant accounted principal sources of yield variation. Further, the intensity of sink (raceme and flower) fonnation and their survivability (podset and abscission) determined pod yield. Thus, increased sink production and reduced floral abscission was responsible for greater pod production in Fallon-1. It may, therefore, be concluded that Fallon-1 may be better genotype in terms of greater DM production and yield.

Keywords: Production, Drymass, Cow pea, Shoot canopy

Location: At the field laboratory of the Department of Crop Botany, Bangladesh Agricultural University, Mymensingh, (

Start Date: 00-12-1999

End Date: 00-05-2000

Program Area: Crop-Soil-Water Management

Commodity: Cowpea

Objectives:

i) To investigate dry mass production and partitioning;

ii) To study root and shoot canopy structure and finally

iii) To study relationships between the above and yield and yield contributing characters in cowpea under field and pot conditions.

Methodology:

The experiment was conducted at the field laboratory of the department of Crop Botany, Bangladesh Agricultural University, Mymensingh, during the period from December, 1999 to May, 2000. Geographically, the experimental field is located at 24°75'N latitude and 90°50'E longitude at the elevation of 18 m above the sea level (Khan,1997).The experimental field was medium high land belonging to the Sonatola soil series of grey flood plain soil type under the agro-ecological zone of old Brahmaputra flood plain. The soil was silty loam, imperfectly poorly drain with slow permeability.

Source of Information: Department of Crop Botany Bangladesh Agricultural University Mymensingh

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

Results revealed that there were genetic variations in shoot and root canopy structures, and flower and DM production. Number of pods/plant accounted principal sources of yield variation. Further, the intensity of sink (raceme and flower) formation and their survivability (podset and abscission) determined pod yield. Thus, increased sink production and reduced floral abscission was responsible for greater pod production in Fallon-1. It may, therefore, be concluded that Fallon-1 may be better genotype in terms of greater DM production and yield.

Knowledge Management: Journal