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Influence of Different Levels of Potassium on Nodulation, Quality, Yield and Nutrients Uptake of Lentil. Season: 2016-2017

M. A. Hossian
Pulses Research Centre, BARI, Ishurdi, Pubna, Bangladesh

S. Akter
Pulses Research Centre, BARI, Ishurdi, Pubna, Bangladesh

B. Anwar
Pulses Research Centre, BARI, Ishurdi, Pubna, Bangladesh

M. A. Quddus
Pulses Research Centre, BARI, Ishurdi, Pubna, Bangladesh

Abstract/ Executive Summary:

An experiment was conducted in the research field of Pulses Research Sub-Station, BARI, Gazipur and RARS, Jessore during Rabi 2016-17 to estimate the suitable doses of potassium for nodulation, quality and yield maximization of lentil. There were 5 treatments viz. T₁= Control, T₂= K 30 kg ha^-1, T₃= K 40 kg ha^-1, T₄= K 50 kg ha^-1 and T₅= K 60 kg ha^-1 along with the blanket dose of N₁₅P₂₀S₁₀Zn₂B_1.5 kg ha^-1. The experiment was laid out in randomized complete block design with three replications. The results revealed that the average yields of lentil (mean of two location) ranged from 1051-1408 kg ha^-1. The highest lentil yield 1168 kg ha^-1 at Gazipur was found in T₅ and 1668 kg ha^-1 at Jessore was obtained from the treatment T₄ and the lowest yield was found in K control plot at both the locations. The highest nodulation was found in T₅ treatment at Gazipur and T₄ treatment at Jessore. The highest net return TK. 56217 ha^-1 and benefit cost ratio 2.51 at Gazipur was counted from the treatment T_5.On the other hand, the greatest net return TK. 96497 ha^-1 and benefit cost ratio 3.61at Jessore was recorded from the treatment T₄and the lowest were in T₁ treatment in both the locations. Therefore, the application of 60 kg K ha^-1 may be considered as economically sound and suitable dose for lentil yield maximization in terrace and 50 kg K ha^-1 for calcareous soils of Bangladesh.

Keywords: Pulse, Potassium, Soil quality, Rabi season, Lentil, Grain yield

Location: Pulses Research Sub-Station, BARI, Gazipur and RARS, Jessore, Bangladesh

Start Date: 00-00-2016

End Date: 00-00-2017

Program Area: Crop-Soil-Water Management

Commodity: Lentil, Soil fertility

Objectives:

To estimate the suitable doses of potassium for nodulation, quality and yield maximization of lentil.

Methodology:

An experiment was conducted during Rabi season of 2016-17 at the experimental field of Pulses Research Sub-Station, BARI, Gazipur and RARS, Jessore to find out the effective doses of potassium for lentil nodulation, quality and yield maximization.There were 5 treatments viz. T₁= Control, T₂= K 30 kg ha^-1, T₃= K 40 kg ha^-1, T₄= K 50 kg ha^-1, T₅= K 60 kg ha^-1 along with the blanket dose of N₁₅P₂₀S₁₀Zn₂B_1.5 kg ha^-1. Initial and final soil samples of experimental plot were collected from 0-15 cm depth and chemical properties were determined through standard methods. The experiment was laid out in randomized complete block design with three replications. The unit plot size was 4 m x 3 m. The lentil variety was BARI Masur-7. The blanket doses of fertilizers were applied as urea, TSP, gypsum, zinc sulphate and boric acid after final land preparation. The K was applied treatment wise as MoP after bed preparation. Lentil seeds at the rate of 30 kg ha^-1 were sown continuous in line with the spacing of line to line of 30 cm on 16 November 2016 at Gazipur and 12 November 2016 at Jessore. Weeding was done in two times-1^st 25 DAS and 2^nd 40 DAS. Three sprays were given with Rovral starting from 50 DAS and two times insecticides (Karate and Ripcord @ 2 ml L^-1of water) both at 10 days interval starting from 50 DAS for controlling insects. The crop was harvested after maturity. Data on seed yield were collected from the whole plot and stover data were counted from 2 square meters but the entire yield contributing characters namely: plant height, branches plant^-1, number of pods plant^-1, number of seeds pod^-1 and 1000 seed weight were collected from ten plants selected randomly from each unit plot. Data on nodulation were counted from 10 plants in each collection. Four times collection of lentil nodules viz. first, second, third and fourth collection were done on 32 DAS, 47 DAS, 62 DAS and 77 DAS, respectively. Collected data were statistically analyzed through Statistix 10 package. In this study BCR was counted for a hectare of land. Treatment wise management cost was calculated by adding the cost incurred for labours, plowing and inputs for each treatment. The seed yield was converted kg ha^-1. This yield was utilized to calculate the gross return. The shadow prices (land rent, stover cost etc) were not considered. The gross return was measured by multiplying the seed yield by the unit price of lentil at that time. Net return was calculated by subtracting management cost from gross return.

Source of Information: Annual Research Report-2016-2017, Pulses Research Centre, BARI, Ishurdi, Pubna, Bangladesh

Article Link (Online Journal):

Funding Source:

Budget:

Total Budget (Tk.) :

Achievement/Findings:

Significant contribution observed in yield and yield component, nodulation up to applied of potassium 60 kg ha^-1 at Gazipur and 50 kg ha^-1 at Jessore and BCR was also found maximum. Therefore, farmer should use 60 kg K ha^-1 in terrace soil and 50 kg K ha^-1in calcareous soil for lentil yield maximization.

Knowledge Management: Report/Proceedings