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Plant Growth Regulators Promote Growth and Yield of Summer Tomato ( Lycopersicone Sculentum Mill.)

M Rahman
Department of Horticulture, Bangladesh Agricultural University, Mymensingh Bangladesh.

MR Karim
Department of Horticulture, Bangladesh Agricultural University, Mymensingh Bangladesh.

MS Sahariar
Department of Horticulture, Bangladesh Agricultural University, Mymensingh Bangladesh.

MA Nahar
Department of Biotechnology, EXIM Bank Agricultural University, Bangladesh.

Abstract/ Executive Summary:

An experiment was conducted at the Horticulture Farm of Bangladesh Agricultural University, Mymensingh to test the impact of plant growth regulators on growth and yield of summer tomato. The experiment consisted of two tomato varieties viz. BARI Hybrid Tomato - 4 and BARI Hybrid Tomato - 8 and four types of plant growth regulator (PGR) viz.,(i) control (without PGR), (ii) 4- CPA (4- chlorophenoxy acetic acid), GA Tomato cultivation during March to September in Bangladesh is constrained due to the adverse weather of summer along with absence of heat tolerant varieties. Tomato requires day temperature of 21 – 28°C and moderately cool night temperature of 15 – 20°C for proper fruit setting. High temperature (both day and night), humidity, rainfall and light intensity are the limiting factors of tomato production. High day and night 3 (gibberellic acid) and 4- CPA +GA₃ . The two- factor experiment was laid out in randomized complete block design with three replications. The results of the experiment revealed that significant variations were observed for most of the characters studied. At 75 DAT, the tallest plant (79.35 cm), number of flowers and fruits (38.11 and 19.04, respectively) plant^-1 , individual weight (58.44 g) and fruit yield (22.75 t ha ^-1 ) were found in BARI Hybrid Tomato- 8.At 75 DAT the maximum plant height (87.90 cm), number of flowers and fruits (49.04 and 21.9, respectively) plant^-1 , individual fruit weight (61.16 g), and fruit yield (27.28 t ha ^-1 ) were found when 4 - CPA + GA₃ applied together, whereas the minimum for these characters were re corded from control plants. In case of combined effect of variety and plant growth regulator, the maximum plant height (87.90 cm), number of flowers and fruits (49.04 and 21.91, respectively) plant ^-1, individual fruit weight (61.16 g) and fruit yield (27.2 8 t ha ^-1 ) were observed in BARI Hybrid Tomato -8 when treated with 4 - CPA + GA₃ together, and the minimum for all these parameters were found in control plants. The results of the present study suggest that both 4 -CAP and GA₃ together can be practiced for increasing summer tomato production for both the varieties.

Keywords: Gibbrellin, 4- chlorophenoxy acetic acid, Growth, Yield, Summer tomato

Location: Horticulture Farm of Bangladesh Agricultural University, Mymensingh

Start Date: 00-06-2014

End Date: 00-10-2014

Program Area: Crop-Soil-Water Management

Commodity: Tomato

Objectives:

To investigate the effect of different PGRs on the growth and yield of summer tomato.

Methodology:

The experiment was carried out at the Horticultural Farm of Bangladesh Agricultural University, Mymensingh during June 2014 to October 2014. Two - factor experiment consisted of four different levels of 4 - chlorophenoxy acetic acid (4 - CPA) i.e, T₀ = control (without 4- CPA), T₁ = 4- CPA @ 20 ppm, T₂ = 4- CPA @ 40 ppm and T₃ = 4- CPA @ 60 ppm; and two varieties of summer tomato namely, BARI Hybrid Tomato-4 and 8 were used in this study. The experiment was laid out in a randomized complete block design with three replications. Thirty - day-old seedlings were transplanted at the spacing of 60 cm × 50 cm. Manures and fertilizers were applied at the rate of cowdung 12 t/ha, urea 450 kg/ha, Triple Super Phosphate (TSP) 350 kg/ha and Muriate of Potash (MoP) 300 kg/ha. Both 4 -CPA and GA₃ were applied at a concentration of 20 ppm. Spraying was performed early in the morning to avoid rapid drying of the spray solution due to transpiration. Data were collected from five randomly selected plants from each plot and were statistically analyzed to find out the statistical significance of the experimental results. The means for all the treatments were calculated and the analyses of variance for all the characters were performed by F test. The significance of difference between the pairs of means was separated by LSD test at 5% and 1% levels of probability.

Source of Information: Progressive Agriculture 26: (1) 32-37, 2015, ISSN: 1017 - 8139

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

The results of the experiment revealed that significant variations were observed for most of the characters studied. At 75 DAT, the tallest plant (79.35 cm), number of flowers and fruits (38.11 and 19.04, respectively) plant^-1 , individual weight (58.44 g) and fruit yield (22.75 t h^-1 ) were found in BARI Hybrid Tomato- 8.At 75 DAT the maximum plant height (87.90 cm), number of flowers and fruits (49.04 and 21.9, respectively) plant ^-1, individual fruit weight (61.16 g), and fruit yield (27.28 t ha^-1 ) were found when 4 - CPA + GA₃ applied together, whereas the minimum for these characters were re corded from control plants. In case of combined effect of variety and plant growth regulator, the maximum plant height (87.90 cm), number of flowers and fruits (49.04 and 21.91, respectively) plant^-1, individual fruit weight (61.16 g) and fruit yield (27.2 8 t ha^-1 ) were observed in BARI Hybrid Tomato -8 when treated with 4 - CPA + GA₃ together, and the minimum for all these parameters were found in control plants. The results of the present study suggest that both 4 -CAP and GA₃ together can be practiced for increasing summer tomato production for both the varieties.

Knowledge Management: Journal