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Effect of Date of Planting on the Growth and Leaf Yield of Stevia (stevia Rebaudiana)

Mr. A. R. Khan
Associate Professor
Department of Agronomy, Bangabandhu Sheikh Mujibur Rahman Agricultural University,Gazipur-1706

S. H. Chowdhury
Department of Agronomy, Bangladesh Agricultural University, Mymensingh-2202, Bangladesh,

M. M. Karim
Department of Agronomy, Bangladesh Agricultural University, Mymensingh-2202, Bangladesh,

Abstract/ Executive Summary:

An experiment was conducted at the Agronomy Field Laboratory, Bangladesh Agricultural University, Mymensingh from December 2009 to March 2011 to determine the effect of date of planting on growth and leaf yield of Stevia. The experiment comprised 24 dates of planting in the year of 2010 viz. 1 January (T₁), 15 January (T₂), 1 February (T₃), 15 February (T₄), 1 March (T₅), 15 March (T₆), 1 April (T₇), 15 April (T₈), 1 May (T₉), 15 May (T₁₀), 1 June (T₁₁), 15 June (T₁₂), 1 July (T₁₃), 15 July (T₁₄), 1 August (T₁₅), 15 August (T₁₆), 1 September (T₁₇), 15 September (T₁₈), 1 October (T₁₉), 15 October (T₂₀), 1 November (T₂₁), 15 November (T₂₂), 1 December (T₂₃) and 15 December (T₂₄). The experiment was laid out in a Complete Randomized Design with three replications. Twenty four dates of planting were included in the experiment in 72 earthen pots (24 X 3) of 30 cm diameter X 30 cm height. Stem cuttings were placed in shaded seed bed for root initiation. Twenty one - day old stem cuttings were used as planting material. Stem cuttings were transplanted in the pots on the specific dates. Different dates of planting had significant effect on the growth and yield parameters. 1 April 2010 (T₇) planting proved to be the superior to the other treatments i.e. plant height (68.50cm), number of leaves plant^-1(142.33), number of primary branches plant^-1(37.33), fresh weight of leaves plant^-1 (14.11g), fresh weight of primary and secondary branches plant^-1 (11.06g and 20.91g), dry weight of leaves plant^-1 (3.38g) which might be due to warm environmental conditions like clear sunshine and high temperature. The overall results suggested that stevia seedlings may be planted from 15 February to 30 April for better yield of leaves.

Keywords: Date of planting, Growth, Leaf yield, Stevia

Location: Mymensingh

Start Date: 00-12-2009

End Date: 00-03-2011

Program Area: Crop-Soil-Water Management

Commodity: Stevia

Objectives:

To determine the effect of date of planting on growth and leaf yield of Stevia

Methodology:

The experiment was conducted at the Agronomy Field Laboratory, BAU, Mymensingh from December 2009 to March 2011 to determine the effect of date of planting on the growth and leaf yield of Stevia. The experimental area was characterized by non-calcareous dark grey floodplain soil belonging to the sonatola soil series under the Old Brahmaputra Floodplain (AEZ-9) (UNDP and FAO 1988). The experiment comprised 24 dates of planting in the year of 2010 viz. 1 January (T₁), 15 January (T₂), 1 February (T₃), 15 February (T₄), 1 March (T₅), 15 March (T₆), 1 April (T₇), 15 April (T₈), 1 May (T₉), 15 May (T₁₀), 1 June (T₁₁), 15 June (T₁₂), 1 July (T₁₃), 15 July (T₁₄), 1 August (T₁₅), 15 August (T₁₆), 1 September (T₁₇), 15 September (T₁₈), 1 October (T₁₉), 15 October (T₂₀), 1 November (T₂₁), 15 November (T₂₂), 1 December (T₂₃) and 15 December (T₂₄). The experiment was laid out in a completely randomized design with three replications. Twenty four dates of planting were included in the experiment in 72 earthen pots (24 X 3) of 30 cm diameter X 30 cm height. Pots were placed in 3 rows. Stem cutting were collected from mother plant of Stevia. Stem cuttings were placed in shaded seed bed for root initiation. Twenty one-day old stem cuttings were planted in the experiment. Three stem cuttings were planted in each pot. A common dose of NPKS @ 48, 12, 16, 6 kg ha^-1, respectively was used in the experimental pots. Intercultural operations like weeding and irrigation were done as and when necessary. At harvest one plant was selected for recording data. Data were collected on plant height (cm), number of leaves plant^-1, number of primary and secondary branches plant^-1, fresh weight of leaf plant^-1 (g), fresh weight of primary and secondary branches plant^-1 (g), fresh weight of plant pot^-1, dry weight of leaves plant^-1 (g) and dry weight of plant pot^-1(g). Recorded data were compiled and tabulated in proper form. The data were analyzed statistically using “Analyses of Variance” technique and mean differences were adjudged by Duncan’s Multiple Range Test (Gomez and Gomez, 1984) with the help of computer package program MSTAT-C.

Source of Information: J. Bangladesh Agril. Univ. 10(2): 205–210, 2012 ISSN 1810-3030

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

From the results it is revealed that yield attributes of stevia differed with different dates of planting. The highest fresh weight of leaves plant^-1 (14.11g), fresh weight of primary and secondary branches plant^-1(11.06g and 20.91g) and dry weight of leaves plant^-1 (3.38g) was produced from 1 April 2010 (T₇) planting. The overall results suggested that stevia seedlings may be planted from 15 February to 30 April for better yield of leaves.

Knowledge Management: Journal