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Phenology, Growth and Yield of Lentil as Influenced by Sowing Time and Seed Rate (2019--2020)

J. HOSSAIN
Pulses Research Centre, RARS, BARI, Ishurdi, Pabna

M.O. ALI
Pulses Research Centre, RARS, BARI, Ishurdi, Pabna

M.A. ISLAM
Pulses Research Centre, RARS, BARI, Ishurdi, Pabna

S.M. ZAMAN
Pulses Research Centre, RARS, BARI, Ishurdi, Pabna

M. HOSSAIN
Pulses Research Centre, RARS, BARI, Ishurdi, Pabna

Abstract/ Executive Summary:

A field experiment was conducted at Pulses Research Centre and Regional Agricultural Research Station, Ishurdi during rabi season 2019-20 to study the effect of sowing time and seed rate on phenology, growth and yield of BARI Masur-8. The experiment was laid with four sowing dates (01 November, 15 November, 1 December, 15 December) in main plots and four seed rates (30 kg ha^-1, 35 kg ha^-1, 40 kg ha^-1and 45 kg ha^-1) in sub-plots replicated thrice in a split-plot design. The highest days for maturity were required in 01 November sowing (118 days) followed by 15 November, 01 December, while the lowest days for maturity were needed in 15 December sowing. Lentil sown on 15 November with 40 kg ha^-1 seed gave the highest seed yield (2397 kg ha^-1) and the lowest yield (1308 kg ha^-1) was obtained from 01 November with 30 kg ha^-1 seed.

Keywords: Phenology, Lentil, Seed rate

Location: Pulses Research Centre and Regional Agricultural Research Station, Ishurdi, Pabna

Start Date: 00-00-2019

End Date: 00-00-2020

Program Area: Crop-Soil-Water Management

Commodity: Lentil

Objectives:

It is needed to evaluate the changes of phenology, GDD, growth and yield and find out the appropriate seed rate according to the sowing time of BARI Masur-8.

Methodology:

The field experiment was conducted at Pulses Research Centre and Regional Agricultural Research Station, Ishurdi, Pabna during rabi season 2019-20. The soils of the experimental areas belong to the High Gangis River Flood Plain (AEZ-11). The soils of the experimental plots were clay loam in texture. The experiment was laid in a split-plot design with four sowing dates (1 November, 15 November, 1 December, 15 December) in main plots and four seed rates (30 kg ha^-1, 35 kg ha^-1, 40 kg ha^-1and 45 kg ha^-1) in sub-plots replicated thrice. The unit plot size was 12 m² (3 m x 4m). The lands were fertilized with 20-20-20 NPK kg N-P-K ha^-1, respectively and all the fertilizers were applied at final land preparation. Seeds of BARI Masur-8 were sown at 30 cm row spacing in experimental plots as per sowing time of various main plot treatments. One hand weeding was done 25 days after sowing (DAS) for controlling the weed. Rovral (@ 2 g L^-1) was used two times for controlling diseases at 60 DAS and 70 DAS. Data on yield contributing characters were recorded from 10 randomly selected plants from each plot and grain yield (kg ha^-1) was recorded from the whole plot. The R-software package was used for all statistical analyses. The mean differences between treatments were separated by the least significant difference (LSD) at P≤ 0.05 for the measured variables.

Source of Information: Annual Research Report 2019-2020, Pulses Research Centre, RARS, BARI, Ishurdi, Pabna

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Achievement/Findings:

The duration of lentil crop was successively reduced with a delay in sowing from 1^st November to 15^th December. Lentil sown on 1^st November took 118 days from sowing to maturity, which was decreased by 22 days on 1 December and 30 days on 15 December sowings in the study. The trends during emergence to flower initiation and pod initiation to maturity noted in the study probably influenced the life cycle of lentil crops. The emergence of seedlings of four sowing times were relatively slower (8 days) on 1 November sown plots compared to two later sowing dates viz. December 1(07 days) and December 15(6 days), which might be due to low temperature during the winter season. Flower initiations of four sowing times (1 November, 15 November, 1 December, and 15 December) were 78, 73, 65, and 57 days, respectively. The duration of the reproductive stage was higher on 15 November (43 days) and the physiological maturity stage was successively reduced with delay in sowing from 1^st November to 15^th December. Sowing time influenced significantly the plant population, branches pod^-1, number of pods plant^-1, and seed yield of lentil. The highest plant height (44 cm) was recorded at sowing on 1 December and the lowest plant height (34 cm) was on 15 December. Lentil sown on 15 November produced the highest number of branches plant ^-1(7.17), pods plant^-1 (96) compared to early and late sowings. There was no statistically significant effect on plant height, seeds pod^-1, 1000-seed weight, and plant population. The highest grain yield (2049 kg ha^-1) was found on 15 November and the lowest yield (1537 kg ha^-1) was from 15 December. Seed rate had significantly influenced on plant population and seed yield of lentil. The highest plant population (85) was at 45 kg ha^-1seed rate and the lowest plant population (72) was at 30 kg ha^-1seed rate. The seed rate of 45 kg ha^-1produced the highest amount of seed yield (2111 kg ha^-1) and the seed rate of 30 kg ha^{-1 has produced} the lowest seed yield (1513 kg ha^-1). Interaction of sowing time and seed rate also influenced statistically on plant population, pods plant^-1, and seed yield. The highest seed yield (2397 kg ha^-1) was obtained from 15 November sowing with a 40 kg ha^-1seed rate and the lowest seed yield (1308 kg ha^-1) was gained at 30 kg ha^-1seed rate with 01 November sowing

Knowledge Management: Report/Proceedings