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Effect of Planting Time on Canopy Structure and Biomass Production in Some Soybean Genotypes

M. K. UDDIN
Entomology Division, Bangladesh Agricultural Research Institute, Joydebpur, Gazipur, Bangladesh

M. K. HASAN
On Farm Research Division, Bangladesh Agricultural Research Institute, Joydebpur, Gazipur, Bangladesh

A. K. M. A. ALAM
School of Agriculture and Rural Development, Bangladesh Open University, Gazipur, Bangladesh

Abstract/ Executive Summary:

A field experiment was conducted in the Field Laboratory of the Department of Crop Botany, BAU, Mymensingh during November 2003 to May 2004 to assess the effect of planting time (November and December) on some morphological structure, and root & shoot biomass production in four soybean genotypes (GPB-1, GPB-2, AGS-332 and AGS-11-35). The plant height, stem base diameter, seed dry weight plant^-1 were significantly greater in the late planting crops (December) but number of branches plant^-1, number of leaves plant^-1, leaves dry weight plant^-1, shoots dry weight plant^-1, roots dry weight plant^-1, total dry matter plant^-1 were also significantly greater in November planting. Highest plant height, branches plant-1 and leaves plant^-1, shoot dry weight plant^-1 and total dry matter were found in GPB-2 genotype.

Keywords: Early and late planting, Shoot and root mass, Glycine max

Location: Bangladesh Agricultural University, Mymensingh

Start Date: 00-11-2003

End Date: 00-05-2004

Program Area: Crop-Soil-Water Management

Commodity: Soybean

Objectives:

To investigate the effect of date of planting on (i) morphological features; (ii) root & shoot biomass production and their relationships with total dry matter (TDM) in four soybean genotypes under Mymensingh condition.

Methodology:

The experiment was carried out at the field laboratory of the Department of Crop Botany, Bangladesh Agricultural University, Mymensingh, during the period from November 2003 to May 2004 in the medium highland of Old Brahmaputra Floodplain (AEZ 9). The soil was silty loam and acidic in nature (pH 6.8). Four genotypes of soyabean viz. GPB-1, GPB-2, AGS-332 and AGS-11-35 were used in the experiment with two different planting dates being 13 November &13 December of 2003. The experiment was laid out in Randomized Complete Block Design with three replications. The plot size was 2m² and the spacing was 30 cm X 5 cm. Five seeds were placed 5cm depth in each hole and two seedlings were removed keeping the healthy one after 15-20 days. The soil was treated with insecticide, Sevin @ 4.2 kg ha^-1 to protect the young seedlings from the attack of cutworm. Fertilizers were applied @ cowdung 6.0 t ha^-1, Urea 20 kg ha^-1, TSP 25 kg ha^-1and MP 25 kg ha^-1. Intercultural operations were done as and when required. The recorded data were compiled and analyzed with computer package MSTAT C.

Source of Information: J Agric Rural Dev 5(1&2), 25-29, June 2007 ISSN 1810-1860

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

Results reveal that November planting may be better for GPB-2 but December for GPB-1 for high biomass production.

Knowledge Management: Journal