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Phenology, Growth and Yield of Lentil as Influenced by Sowing Time and Seed Rate (2018--2019)

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 2018-19 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. Lentil sown on 01 November took 120 days from sowing to maturity, which was decreased by 20 days on 01 December and 30 days on 15 December sowings. Lentil sown on 15 November at the seed rate of 35 kg ha^-1was produced the highest seed yield (3125 kg ha^-1) and the lowest yield (1417 kg ha^-1) was obtained from 30 kg ha^-1seed rate with 15 December sowing.

Keywords: Phenology, Seed rate, Sowing time, Lentil

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

Start Date: 00-00-2018

End Date: 00-00-2019

Program Area: Crop-Soil-Water Management

Commodity: Lentil

Objectives:

To evaluate the changes of phenology, GDD, growth and yield and find out the appropriate seed rate according to 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 2018-19. 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) were 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 2018-2019, Pulses Research Centre, RARS, BARI, Ishurdi, Pabna

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Achievement/Findings:

The duration of the 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 120 days from sowing to maturity, which was decreased by 20 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 faster (3 days) on 1 November sown plots compared to two later sowing dates viz. December 1(07 days) and December 15(8 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 75, 68, 66 and 65, respectively. Sowing time influenced significantly the plant height, the number of pods plant^-1, thousand seed weight, and seed yield of lentils. The highest plant height (43 cm) was recorded at sowing on 15 November and the lowest plant height (34 cm) was on 15 December. Lentil sown on 15 November produced the highest number of branches Plant ^-1(4.12), pods plant^-1 (171) compared to early and late sowings. There was no statistically significant effect on 1000-seed weight and plant population. The highest grain yield (2511 kg ha^-1) was found from 15 November and the lowest yield (1578 kg ha^-1) from 15 December. Seed rate had significantly influenced plant population, the number of pods plant^-1 and the seed yield of lentils. The highest plant population (110) was at 45 kg ha^-1seed rate and the lowest plant population (94) was at 30 kg ha^-1seed rate. The seed rate of 45 kg ha^-1produced the highest amount of seed yield (2214 kg ha^-1) and the seed rate of 30 kg ha^{-1 has produced} the lowest seed yield (1828 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 (3125 kg ha^-1) was obtained from 15 November sowing with 45 kg ha^-1seed rate and the lowest seed yield (1417 kg ha^-1) was gained at 30 kg ha^-1seed rate with 15 December sowing

Knowledge Management: Report/Proceedings