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Influence of Method and Date of Planting on the Production of Lettuce

P. C. D. SHARMA
MS Student
Horticulture, BSMRAU, Gazipur

M. M. RAHMAN
Professor
Dept. of Horticulture and Crop Botany, BSMRAU, Gazipur

M. A. H. MOLLAH
Assoc. Professor
Dept. of Horticulture and Crop Botany, BSMRAU, Gazipur.

M. S. ISLAM4
4Senior Scientific Officer, HRC, BARI, Gazipur-1701, Bangladesh.

Abstract/ Executive Summary:

The effect of two planting methods (direct seed sowing and transplanting of seedlings) and seven dates of planting (8 Oct., 2 Nov., 27 Nov., 22 Dec., 16 Jan., 10 Feb. and 5 March) on the production of lettuce was compared. ‘Green Wave’ a loose leaf Japanese variety was used. The average yield of the direct seeded crops (17.16 t/ha) was found to be almost double than that of the transplanted crops (9.08). The yields (t/ha) from different dates of planting were 13.7 (8 Oct.), 15.04 (2 Nov.), 8.94 (27 Nov.), 14.54 (22 Dec.), 21.45 ( 16 Jan.) 10.16 (10 Feb.), and 8.02 (5 March). The highest yield of 24.0 t/ha was obtained from direct seedling on 16 January.

Keywords: Method, Date, Planting, Production of lettuce.

Location: Farm of Bangabandhu Sheikh Mujibur Rahman Agricultural University (BSMRAU), Gazipur

Start Date: 00-10-2002

End Date: 00-05-2003

Program Area: Crop-Soil-Water Management

Commodity: Lettuce

Objectives:

To compare the two methods of production and to know the effect of date of planting on the success of production and the yield and other characters of the crop.

Methodology:

The experiment was conducted at the experimental Farm of Bangabandhu Sheikh Mujibur Rahman Agricultural University (BSMRAU), Gazipur during the period of October 2002 to May 2003. The soil of the experimental site was sandy loan in texture and belonging to the Salna series with a pH of 6.5. Mean monthly maximum and minimum temperature, relative humidity and precipitation that prevailed during the experimental period.Lettuce cultivar Green Wave (originated in Japan) was used as the test crop for the experiment. It is of the leafy and spreading type and stated to be heat tolerant. The experiment was laid out in split-plot design with three replications. There were two planting methods viz., direct seed sowing and transplanting and seven planting dates viz., 8 October, 2 November, 27 November, 22 December 16 January, 10 February and 5 March in the experiments. The methods were placed in main plots and planting dates in subplots. Subplot treatments were randomly assigned in each main plot. The total number of subplots was 42. The size of each subplot was 2m×2m. The subplots, the main plots and blocks were separated by a spacing of 0.5, 0.5, and 1.0m, respectively. Plant to plant distance was 20 cm and row to row distance was 40 cm in each subplot. Each plot contained 25 lettuce plants. Manures and fertilizers were applied @ cowdung 10 tons, urea 250 kg, TSP 150 kg, and MP 250 kg per hectare. Fifty percent of cowdung was applied during land preparation. The remaining cowdung, entire quantity of TSP and MP were applied during pit preparation. Urea was applied as top dressing in two equal installments at 30 and 45 days after sowing and 10 and 20 days after transplanting. The seeds were sown in sub plots as per scheduled dates (25 days interval) with a row spacing of 40 cm and 20 cm within row in pit. First thinning was done after 10 days at 2-leaf stage, keeping 4-5 plants per pit; second thinning was done 8 days after the first thinning at 3-4-leaf stage keeping 2-3 plants per pit and the third thinning was done 7 days after second thinning keeping one plant per pit at 5-6-leaf stage. In the case of transplanting, seeds were sown in well prepared seedbed as per scheduled dates. Germination of seeds was complete within five days. Twenty five days old seedlings were transplanted in the subplot with spacing of 40 cm × 20 cm. Irrigation along with other intercultural operations were done as and when needed. The crop was harvested at 55 days after sowing and 30 days after transplanting. Ten plants were randomly selected from each plot for collection of data. The recorded data were statistically analyzed and the means were separated by Duncun’s Multiple Range Test (DMRT) for interpretation of results.

Source of Information: Bangladesh J. Agril. Res. 34(1): 75-80, March 2009 ISSN 0258-7122

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

It was revealed that the directly sown plants in all planting dates performed better in respect of leaf yield and all yield contributing characters. The results led to conclude that the lettuce cultivar (Green Wave) may be sown during October to January for acceptable yields. Later planting will reduce the yield unless the variety is highly heat tolerant.

Knowledge Management: Journal