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Influence of Phosphorus Levels on Growth and Yield of Four Lentil Varieties

RA Sonet
Department of Agronomy, Sher-e-Bangla Agricultural University, Sher-e-Bangla Nagar, Dhaka-1207, Bangladesh

MH Ali
Department of Agronomy, Sher-e-Bangla Agricultural University, Sher-e-Bangla Nagar, Dhaka-1207, Bangladesh

AKMR Amin
Department of Agronomy, Sher-e-Bangla Agricultural University, Sher-e-Bangla Nagar, Dhaka-1207, Bangladesh

MN Haque
Department of Agronomy, Sher-e-Bangla Agricultural University, Sher-e-Bangla Nagar, Dhaka-1207, Bangladesh

SM Masum
Department of Agronomy, Sher-e-Bangla Agricultural University, Sher-e-Bangla Nagar, Dhaka-1207, Bangladesh

Abstract/ Executive Summary:

An adequate supply of phosphorus (P) is important for the proper growth and yield of lentil, particularly in poor fertile soil. As such an experiment was carried out to evaluate the effects of phosphorus (P) fertilizer application on growth, yield, and yield components of lentil at the agronomy research field of Sher-e-Bangla Agricultural University, Dhaka, Bangladesh during 2013-2014. Four lentil varieties (BARI Masur-4, BARI Masur-5, BARI Masur-6, and BARI Masur-7) and four levels of P (0, 20, 40 and 60 kg P₂O₅ ha^-1) were used in this experiment as treatment variables. Interaction of cultivar and P levels showed a significant influence on all the plant characters studied except plant height and branch production. The highest seed yield (1.98 t ha^-1) was obtained from the combination of BARI Masur-7 with 40 kg P₂O₅ ha^-1, and the lowest (1.08 t ha^-1) was from BARI Masur-5 with 0 kg P₂O₅ ha^-1. Addition of P fertilizer beyond 40 kg ha^-1 decreased seed yield irrespective of varieties. Results revealed that the application of P fertilizer offers a large scope for obtaining a higher yield of lentil in Bangladesh. However, the application of P fertilizer at the rate of 40 kg P₂O₅ ha^-1 would be the optimum for achieving higher yield irrespective of varieties.

Keywords: Lentil, Phosphorus, Biofortification, Nodule, AEZ 28

Location: Agronomy Department, Sher-e- Bangla Agricultural University, Dhaka

Start Date: 00-12-2013

End Date: 00-04-2014

Program Area: Crop-Soil-Water Management

Commodity: Lentil, Fertilizer

Objectives:

To study the effect of P fertilizer levels on the growth and yield of lentil genotypes.

Methodology:

The field experiment was conducted at the research field of the Agronomy Department, Sher-e- Bangla Agricultural University, Dhaka (Tejgaon series under AEZ 28) during the period December 2013 to April 2014. The experimental site was located at 23º77' N latitude and 90^o3' E longitude with an elevation of 4.0 m from the sea level. The temperature during the cropping period ranged between 17.0 ºC to 26.9 ºC, the humidity 58.66% to 80.25% with 10.5-11.0 hours day length, and very little rainfall was recorded. The soil of the experimental site was silt loam in texture, with pH 6.4, organic carbon 0.68%, total nitrogen 0.08%, available phosphorus 10.99 mg kg^-1, available potassium 0.05 meq100 g^-1 and available sulphur10.5 mgkg-1. The climate of this area is subtropical with average monthly maximum and minimum temperature, rainfall, relative humidity of 27.34 ^oC and 16.04 ^oC, 62.34 mm, 66.53%, respectively. Four lentil varieties (V₁ = BARI Masur- 4, V₂ = BARI Masur-5, V₃ = BARI Masur-6, V₄ = BARI Masur-7) and four levels of phosphorus (P₀ = 0 kg P₂O₅ ha^-1, P₁ = 20 kg P₂O₅ ha^-1, P₂ = 40 kg P₂O₅ ha^-1, P3 = 60 kg P₂O₅ ha^-1) were used. The experiment was laid out in a Split- plot design with three replications. Different varieties of lentils were in the main plot and different levels of phosphorus in sub-plot. In this experiment phosphorus was applied as per treatment and urea (175 kg ha^-1), MoP (125 kg ha^-1), gypsum (75 kg ha^-1) were used as a recommended doses (FRG, 2012). The whole amount of all fertilizers except P was applied as basal dose (during final land preparation). Rate of P in the form of Triple Super Phosphate (TSP) was used as per treatment and applied as a basal dose. Sowing was done on 18 November 2013 in continuous rows at the rate of 35 kg ha^-1. After sowing the seeds were covered with soil, slightly pressed by hand. The maturity of the crop was determined when 95% of the pods become brown. The data collected on different parameters were statistically analyzed and significant differences among the treatment means were compared by Duncan’s Multiple Range Test (DMRT) at 5% level of probability (Gomez and Gomez, 1984).

Source of Information: Bangladesh Agron. J. 2020, 23(1): 29-36

Article Link (Online Journal): DOI: https://doi.org/10.3329/baj.v23i1.50114

Funding Source:

Budget:

Total Budget (Tk.) :

Achievement/Findings:

The agronomic biofortification had influenced the plant height, branch plant^-1, and importantly, the number of nodules plant^-1. So, optimum management of P is necessary to harvest the full potential of the lentil crop cultivated on low to medium P status soils. The combination effect revealed that lentil var. BARI Masur-7 with 40 kg P₂O₅ ha^-1 performed best in producing a higher seed yield. Therefore, it could be concluded that var. BARI Masur-7 with 40 kg P₂O₅ ha^{- 1}may be a promising practice for obtaining a higher seed yield of lentil under AEZ 28 of Bangladesh.

Knowledge Management: Journal