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Seed Yield of Mungbean in Relation to Growth and Developmental Aspects

M. Monjurul Alam Mondal, PhD
Principal Scientific Officer
Crop Physiology Division, Bangladesh Institute of Nuclear Agriculture, BAU Campus, Mymensingh-2202, Bangladesh

Dr. M. A. Malek
Principal Scientific Officer
Plant Breeding Division, Bangladesh Institute of Nuclear Agriculture, BAU Campus, Mymensingh-2202, Bangladesh

Abstract/ Executive Summary:

Growth parameters such as leaf area (LA), total dry mass (TDM) production, crop growth rate (CGR), relative growth rate (RGR) and net assimilation rate (NAR) were compared in six varieties of mungbean under sub-tropical condition (24⁰8´ N 90⁰0´ E) to identify limiting growth characters for the efficient application of physiology breeding for higher yields. Results revealed that a relatively smaller portion of TDM was produced before flower initiation and the bulk of it after anthesis. The maximum CGR was observed during pod filling stage in all the varieties due to maximum leaf area (LA) development at this stage. Two plant characters such as LA and CGR contributed to the higher TDM production. Results indicated that high yielding mungbean varieties should possess larger LA, higher TDM production ability, superior CGR at all growth stages and, high relative growth rate and net assimilation rate at vegetative stage which would result superior yield components.

Keywords: Mungbean; Grwoth, Yield attributes, Yield

Location: Experimental farm, Bangladesh Institute of Nuclear Agriculture, Mymensingh

Start Date: 11-03-2009

End Date: 31-05-2010

Program Area: Crop-Soil-Water Management

Commodity: Mungbean

Objectives:

To know a better understanding of crop growth and yield parameters and the partitioning of assimilates into seed formation would help to expedite yield improvement of mungbean. It was with this aim that the present investigation was carried out.

Methodology:

The experiments were carried out at the experimental field of Bangladesh Institute of Nuclear Agriculture (BINA), Mymensingh, Bangladesh in Kharif-I (February-May) season of 2009 and 2010. Six mungbean varieties (BARImung-4, BINAmung-7 and BUmung-1, BARImung-6, BINAmung-6 and BUmung-2) were used as planting material. The experiments were laid out in a randomized complete block design with three replicates in both the years. Urea, triple superphosphate, muriate of potash and gypsum were used as a source of nitrogen, phosphorus, potassium and sulphur at the rate of 40, 120, 80 and 30 kg ha^-1, respectively at the time of final land preparation. A unit plot size of 20 m² (5 m ´ 4 m) with plant spacing of 30 cm × 10 cm was used. Recommended cultural practices were followed for normal plant growth and development.

To study ontogenetic growth characteristics, a total of five harvests were taken in both the years. The first crop sampling was done at 25 DAS and continued at an interval of ten days up to 65 DAS i.e. till attaining physiological maturity. From each sampling, a unit area of 0.3 m² in two adjacent rows of 0.5 m (10 plants) were randomly selected from each plot and uprooted for collecting necessary parameters. The growth analyses like crop growth rate, relative growth rate and net assimilation rate was carried out following the formulae of Hunt (1976). The number of opened flowers plant^-1 was recorded from 15 randomly selected pants i. e., five from each plot. The opened flowers were counted daily. The yield contributing characters were recorded at harvest from ten competitive plants of each plot. The seed yield was recorded from five rows of each plot (1.50 m × 3.0 m) and converted into seed weight plant^-1 by dividing the plant number. Data were analyzed statistically.

Source of Information: The Scientific World Journal, Volume 2012, Article ID 425168, 7 pages, doi:10.1100/2012/425168

Article Link (Online Journal):

Funding Source:

1. Government

Budget:

Total Budget (Tk.) :

Achievement/Findings:

For getting superior characters of yield components, a high yielding mungbean genotype should posses a relatively larger leaf area with superior growth parameters.

Knowledge Management: Journal