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Response of Foliar Application of Ga3 in Different Plant Ages for Seed Production in Black Cumin

M Z Haq
Seed Science and Tech. Unit, BSMRAU, Gazipur

M M Hossain
Dept. of Horticulture BSMRAU, Gazipur

M S Huda
Farm Div. BARI, Gazipur

S S Zamal
Minor Irrigation BADC, Gazipur

M R Karim
Bangladesh Agriculture and Food Security Programme, BRAC, Gazipur

Abstract/ Executive Summary:

The effect of foliar application of plant growth regulator viz. GA₃ in different growth stages was investigated on growth and yield of black cumin at Horticulture Research Field, Bangabandhu Sheikh Mujibur Rahman Agricultural University, Gazipur, Bangladesh in winter season of 2012-13. The experiment consisted of 7 levels of GA₃ (0, 25, 50, 75, 100, 125 and 150 ppm) with three replications. Different doses of GA₃ weresprayed both at vegetative (40 days) and flowering stage (60 days). The results indicated that growth and yield of black cumin were increased with the increasing of concentration of GA₃up to 100 ppm. Application of GA₃ at vegetative stage was more effective than that of flowering stage. The maximum number of branches/plant, plant height, weight/plant, capsule/plant, 1000 seed weight, seed yield and stover yield were observed with application of GA₃100ppm at vegetative stage. The highest seed yield (2.09 t/ha) was obtained by the application of GA₃ 100 ppm at vegetative stage. The results suggest that for higher seed production of black cumin, GA₃ should be applied at vegetative stage with concentration of 100 ppm.

Keywords: Black cumin, GA3, Vegetative stage, Flowering stage, Yield

Location: Horticulture Research Field, Bangabandhu Sheikh Mujibur Rahman Agricultural University, Gazipur

Start Date: 00-00-2012

End Date: 00-00-2013

Program Area: Crop-Soil-Water Management

Commodity: Black cumin

Objectives:

To find out the effect of GA₃ on seed production of black cumin.

Methodology:

The experiment was conducted at the Horticulture Research Field, Bangabandhu Sheikh Mujibur Rahman Agricultural University, Gazipur during the winter season of 2012-13. The experiment consisted of 7 levels of foliar application of GA3 (0, 25, 50, 75, 100, 125 and 150 ppm), both in vegetative (T₁, T₃, T₅, T₇, T₉, T₁₁and T₁₃respectively) and flowering stages (T₂, T₄, T₆, T₈, T₁₀, T₁₂ and T₁₄ respectively). The experiment was laid out in a randomized complete block design with three replications. Each block consisted of 14 plots and the dimension of each plot was 1.2 m × 1.2 m (1.44 m²) with a plot to plot and block to block distance 0.5 m and 1.0 m respectively. Genotype of black cumin was used in the experiment as exotic, Iran. The seeds were soaked in water for 24 treated by Bavistin @ 2 g/kg of seed to minimize the primary seed-borne diseases. The land was well prepared by deep and cross plough with a tractor disk harrow followed by laddering. Weeds and stubbles of the previous crops were collected and removed from the field during land preparation. Soil clods were broken and plots were prepared as 10 cm raised so that irrigation and rain water easily could drain out and seeds could easily be germinated. The experiment plots were manured and fertilized with cowdung, N, TSP and MP at the rate of 10 t/ha, 125 kg/ha, 95 kg/ha and 75 kg/ha respectively. The total amount of cow dung, half of N,full dose of TSP and MP were applied at the time of final land preparation. The remaining N was applied at 40 days after sowing (DAS) of seeds as top dress followed by irrigation. The seeds were mixed with some loose soil to allow uniform sowing in rows. Then, seeds were sown in rows 15 cm apart continuously by hand @ 10 kg/ha, maintaining a depth of one cm. The seeds were covered with loose soil properly just after sowing and gently pressed by hands. Continuous line sowing was done to maintain plant to plant distance 10 cm by thinning later on. The field was kept free from weed by hand weeding. Weeding cum thinning was done in installments at 25, 40 and 60 days after sowing (DAS). To keep spacing 15 x 10 cm², properly thinning was done at 25 days after sowing.Fungicide Bavistin @ 2 g/L was sprayed to control damping off. The spray was done twice at the 10 days interval from 25 DAS. The crop was harvested when 50% of the capsules changed color from green to straw. Seeds from capsule were separated by beating with sticks and cleaned by winnowing and dried properly (8% moisture of seed). Parameters were taken as plant height, length and breath of leaf, number of branches per plant, fresh and dry weight per plant, number of capsule per plant, 1000 seed weight, seed yield per plant and per hectare, stover yield per hectare and harvest index. The data were analyzed statistically and means were separated by Least Significance Difference method. The means for all the treatments were calculated and analysis of variance for all characters was performed by F- variance test.

Source of Information: Eco-friendly Agril. J. 6(08): 150- 155, 2013 (August); ISSN 1999-7957

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Funding Source:

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Total Budget (Tk.) :

Achievement/Findings:

Foliar application of GA₃ with concentration of 100 ppm at vegetative stage enhanced the seed production of black cumin.

Knowledge Management: Journal