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Root Traits, Nutrient Uptake, Multi-location Grain Yield and Benefit-cost Ratio of Two Lentil (lents Culinaris, Medikus.) Varieties

Dr.Tara Singh Gahoonia
Associate Professor
The Veterinary and Agricultural University, Copenhagen,Denmark

Dr. Md.Omar Ali
Principal Scientific Officer (PSO)
PRSS, BARI,Gazipur

Dr. Ashutosh Sarker
Regional Coordinator and Principal Scientist
ICARDA Office,Pusa Campus New Delhi,India

Dr. M. M.Rahman
Coordinator,
Rice-Pulse Project, IRRI Office, Banani, Dhaka

Dr. W. Erskine
Director
CLIMA, UWA, Pearth Australia

Abstract/ Executive Summary:

The roots of BM-4 penetrated the 25 cm depth of the soil profile after 19 ± 1 days and while those of BARI Masur-3 took 24± 2 days to same depth. The roots of BARI Masur-4 were covered with denser (26± 3 mm-1) and longer (0.48± 0.11) root hairs than BARI Masur-3 (density 17± 2 mm-1, length 0.32± 0.09 mm). The differential presence of root hairs increased the effective length of root system of BARI Masur-4 by 12 times and that of BM-3 by five times. The lentil varieties did not differ in their ability acid phosphates activity in rhizosphere. In the pot experiment, the uptake of macro-nutrients (K, P, Ca and Mg) as well as micro-nutrients (Fe, Mn, Zn, Cu, B and Mo) by BARI Masur-4 was significantly higher, compared to BARI Masur-3. The varieties produced the same amount of shoot biomass. At five of six agro-ecological distinct field locations in Bangladesh, BARI Masur-4 gave significantly higher (10-20%) grain yield than BARI Masur-3. Linked with the higher grain yield, the benefit-cost ratio (BCR) of BARI Masur-4 was 3.14 and that of BARI Masur-3 were 2.62, indicating that BARI Masur-4 provided better return per unit investment, compared to BARI Masur-3.

Keywords: Benefit-cost ratio, Genetic diversity, Lentil, Root

Location: Pulses Research Centre (PRC), Ishurdi, Pabna

Start Date: 15-03-2004

End Date: 30-03-2005

Program Area: Variety and Species

Commodity: Lentil

Objectives:

To find out the relationship between root systems and grain yield

Methodology:

The various root traits of the two lentil varieties, BARI Masur-3 (BM-3) and BARI Masur- 4(BM-4), were studied, because they are high yielding, but often contrast in grain yield and popularity and adoption among farmers in Bangladesh. Both varieties and small seeded (microsperma) and considered to be tolerant/resistance to Rust and Stemphylium Blight diseases. The seeds of BM-4 are light pink in color, which accords them slightly higher market price. BM-3 was developed through a national hybridization program from a cross between BLL 79666 (Indian) and local Iandrace from Pabna Bangladesh (Sarker et al., 1999a). BM-4 was developed from the cross between ILL 5888 (improved Iandrace) and ILL5782 (ICARDA breeding line) at ICARDA- Syria specifically for Bangladesh (Sarker et al., 1999b). The root growth and length of the two varietieswas studied in a pot experiment at PRC,Ishurdi,Pabna. At 20 and 60 days after sowing shoot and root were collected. After collection root and shoot were studied for growth and length. Root hairs and rhizosphere phosphotase activity were determind.

Source of Information: Journal of Plant and Soil (2005):153-161.

Article Link (Online Journal):

Funding Source:

1.	Budget: Fifty thousan only
2.	Budget: Fifty thousan only

Total Budget (Tk.) : Fifty thousan only

Achievement/Findings:

It was found that, the benefits of selection and breeding for superior root traits for better agro-economics.

Knowledge Management: Journal