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Effect of Planting Date and Gibberellic Acid on the Growth and Yield of Garlic

M.A. Islam
NCDP, ADAE Office, Rangpur

M.H.Reza
ARS, BARI, Burirhat, Rangpur,

K.M. Islam
HTDC, DAE, Burirhat, Rangpur

S.M.A.H.M.Kamal
OFRD, BARI, Alamnagar, Rangpur

M.A.Wazed
DAE, Gangachara, Rangpur

Abstract/ Executive Summary:

An experiment was conducted with a local cultivar of garlic to study the effects of planting date and gibberellic acid on the growth and yield of garlic at the field laboratory of the Department of Crop Botany, Bangladesh Agricultural University, Mymensingh during November 2001 to April 2002. Early planting influenced the plant height, leaf number, bulb diameter and total dry matter. With the delay in planting time starting from November 7, the yield was chronologically reduced in later plantings. Significantly the highest bulb yield (2.67 t/ha) was recorded when planting was done on November 7 and lowest yield (0.92 t/ha) was obtained from December 22 planted crop. Bulb yield was higher in control plants than those of GA₃ treated plants. The interaction effects of planting date and different concentrations of GA₃ differed significantly in respect of plant height, number of leaves, bulb diameter and dry weight of roots, leaves and bulbs and yield of garlic.

Keywords: Planting time, Gibberellic acid, Bulb yield, Garlic.

Location: Field laboratory of the department of Crop Botany, BAU, Mymensingh

Start Date: 00-22-2001

End Date: 00-04-2002

Program Area: Crop-Soil-Water Management

Commodity: Garlic

Objectives:

To study the effects of different planting times and concentrations of gibberellic acid (GA₃) on the growth and yield of garlic.

Methodology:

The experiment was conducted at the field laboratory of the department of Crop Botany, BAU, Mymensingh during November 2001 to April 2002. The soil of the experimental land was sandy loam in texture and belonged to Old Brahmaputra alluvial type (Sonatala). The experimental plots were fertilized with cowdung, urea, triple super phosphate (TSP) and muriate of potash (MP) at the rate of 14 t, 90 kg, 120 kg and 180 kg/ha respectively. The experiment was laid out in the factorial randomized complete block design with three replications. The unit plot size was 2m x 2m. The cloves were planted in rows with 20 cm spacing and 15 cm apart. Four planting dates were November 7, November 22, December 7, December 22, 2001 and concentrations of growth regulator (GA₃) were 0 ppm, 100 ppm and 200 ppm. The cloves of uniform size were selected for planting. Gibberelic acid applied as foliar spray at 30 days after planting as per treatment. Weeding and mulching were done as and when required. Irrigation was provided after each fertilization by a water cane. Five plants randomly collected from each plot at 30 days interval up to 120 DAP for growth parameter. At the final harvest, data were recorded on individual bulb weight, number of cloves per bulb, number of leaves per plant, yield/ha. The collected data were statistically analyzed. The significance of the difference between means were expressed as Least Significant Difference (LSD) at 5% level as the minimum unit of significance.

Source of Information: The Agriculturists 6(1&2): 132-139 (2008), ISSN-1729-5211

Article Link (Online Journal):

Funding Source:

Budget:

Total Budget (Tk.) :

Achievement/Findings:

From the above results it may be concluded that early planting gave the higher yield than that of late planting. In case of gibberellic acid controlled plants produced higher yield than the plants treated with different concentrations. So early planting can influence higher yield without application of GA₃.

Knowledge Management: Journal