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Growth and Yield of Lentil in Relation to Population Pressure

R. K. Dutta
Chief Chientific Officer
Crop Physiology Division, Bangladesh Institute of Nuclear Agriculture, BAU Campus, Mymensingh-2202, Bangladesh

Dr. M. A. Baset Mia
Senior Scientific Officer
Crop Physiology Division, Bangladesh Institute of Nuclear Agriculture, BAU Campus, Mymensingh-2202, Bangladesh

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

Abstract/ Executive Summary:

The population pressure gradients on lentil cv. L-5 showed that increased population affects morphological characters, crop growth rate, net assimilation rate and chlorophyll a/b ratio. Results indicated that number branches and pods and seed yield/plant were influenced by population pressure. Chlorophyll a/b ratio was higher at low population pressure. Dense population gave higher seed yield despite the favourable effect of low population on NAR, CGR, chlorophyll a/b ratio, branches/plant, pods/plant and seed yield/plant. The results suggest that the ideal plant type of lentil under Bangladesh spatial and temporal conditions is compact, of moderate height and stature and narrow leaves.

Keywords: Lentil, Spacing, Growth, Chlorophyll, Seed yield

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

Start Date: 05-11-1994

End Date: 26-03-1995

Program Area: Crop-Soil-Water Management

Commodity: Lentil

Objectives:

To determine the growth and some biochemical characteristics under various population pressures.

Methodology:

The experiment was conducted at the experimental farm of Bangladesh Institute of Nuclear Agriculture, Mymensingh, during the period from November 1994 to March 1995 with lentil cv. L-5. The treatments comprised three row spacing (20, 25 and 30 cm) and four plant to plant distances (4, 6, 8 and 10 cm). The size of the unit plot was 4 m x 4 m. The doses of fertilizers were: urea 40, TSP 80, MP 60 and gypsum 40 kg ha^-1. Sufficient seeds of lentil were hand sown in rows on 02 November, 1994 so that plant population could be maintained after plant establishment. At 20 DAS, thinning was done to maintain the required population. For growth, each plot five plants were randomly selected and uprooted for obtaining data of necessary parameters. The plants were separated into leaves, stems, roots and nodules, and the corresponding dry weights were recorded after oven drying at 80 ± 2 ⁰C for 72 hours. The leaf area of each sample was measured by LICOR automatic leaf area meter. The sampling was done at 35, 50 and 65 DAS. Chlorophyll was matured at 60 DAS. At harvest yield components were recorded from 10 plants of each plot. The collected data were statistically analyzed and the means were adjudged by DMRT at 5% level of significance.

Source of Information: LENS Newsletter, 25: 27-29 (1998)

Article Link (Online Journal):

Funding Source:

1. Government

Budget:

Total Budget (Tk.) :

Achievement/Findings:

For getting higher seed yield, the ideal plant type of lentil under Bangladesh spatial and temporal conditions is compact, of moderate height with proportional stature and narrow leaves.

Knowledge Management: Newsletter