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Response of Mungbean Growth and Yield to Ga3 Rate and Time of Application

Sanjida Tasnim
Department of Agronomy, Hajee Mohammad Danesh Science and Technology University, Dinajpur.

Md. Jewel Alam
Department of Entomology, Bangladesh Agricultural University (BAU), Mymensingh, Bangladesh.

Md. Mominur Rahman
Department of Agronomy, Hajee Mohammad Danesh Science and Technology University, Dinajpur.

Md. Sohidul Islam
Department of Agronomy, Hajee Mohammad Danesh Science and Technology University, Dinajpur.

Md. Shafiqul Islam Sikdar
Department of Agronomy, Hajee Mohammad Danesh Science and Technology University, Dinajpur.

Abstract/ Executive Summary:

Mungbean (Vigna radiata L.) is a high protein content pulse crop in Bangladesh. Gibberellic acid (GA₃) is a phytohormone that accelerates the plant growth and development which is helping to increase yield. A field experiment was conducted at the Agronomic Research Field, Hajee Mohammad Danesh Science and Technology University, Dinajpur during April to August 2018 in order to investigate the effect of GA₃ application time and different concentrations on morpho-physiological, yield and yield contributing characters of mungbean cv. BARI mung-8. The experiment comprised three application time of GA₃ viz. 15, 30 & 45 DAS and three concentration viz. 0, 100 & 200ppm. Mungbean cv. BARI mung-8 (Sunamung) was used as an experimental crop. The research experiment was laid out in Randomized Complete Block Design (RCBD) with three replications. Most of the growth and yield contributing characteristics of BARI mung-8 was significantly influenced by different times and concentration of GA₃. Among the time of application and concentrations of GA₃ at 30 DAS with 200ppm of GA₃ produced the tallest plant and number of branches plant^-1. At 200ppm of GA₃ application only increased vegetative growth, but concentration @100 ppm of GA₃ application showed the best performance on yield and yield contributing characters. So, 100ppm of GA₃ produced the longest pod, highest number of pods plant^-1, number of seed pod^-1, 1000 seed weight, seed yield, stover yield, biological yield and harvest index. The highest seed yield (1.14 t ha^-1) was obtained from 30 DAS whereas the lowest one (0.84 t ha^-1) recorded from 15 DAS. The seed yield increase with increasing concentration of GA₃ up to 100ppm and then yield was reduced. The maximum seed yield (1.35 t ha^-1) and biological yield (4.12 t ha^-1) was recorded from 100ppm GA₃ applied at 30 DAS, whereas no application of GA₃ produced the minimum seed yield (0.73 t ha^-1) and biological yield (2.77 t ha^-1). The present study reveals that BARI mung-8 performed the best with the application of GA₃ @100ppm at 30 DAS for enhancing growth and getting maximum yield.

Keywords: Gibberellic acid, Application time and rate, Morpho-physiological attributes, Mungbean

Location: Agronomic Research Field, Hajee Mohammad Danesh Science and Technology University, Dinajpur

Start Date: 00-04-2018

End Date: 00-08-2018

Program Area: Variety and Species

Commodity: Mungbean, Hormone

Objectives:

This present study deals with the response of mungbean to GA₃ in relation to morphological and yield contributing attributes, such as height of plant, number of branches per plant, pod length, pods per plant, 1000 seed weight, stover yield, seed yield, biological yield and harvest index.

Methodology:

Experimental site and soil: The mungbean (vigna radiata L.), also known as sunamung in Bengali, is in the Legume family of plants and closely related to cowpea. It is an important pulse crop on base of global economic importance. The experiment was conducted at the Agronomy Research Field in Hajee Mohammad Danesh Science and Technology University (HSTU), Dinajpur, during the month of April to August, 2018 in order to study the determine between different time and rate of gibberellic acid (GA₃) on morpho-physiology and yield attributes of mungbean cv. BARI mung-08(Sunamung). The experimental site belongs to the Agro Ecological Zones (AEZ-01) “Old Himalayan Piedmont Plain”. The information of weather regarding temperature, relative humidity and rainfall prevailed at the experimental site during the study period. The weather information was recoded from research field, HSTU, Dinajpur. The research field was a medium high land having well drained silty-loam texture with pH value 5.41 and moderate fertility level with 1.48% organic matter content and others nutrient components well. Experimental treatments and design: The experimental treatments i) the rate of gibberellic acid (GA₃) viz. 0, 100 & 200 ppm and ii) time of application of gibberellic acid (GA₃) viz. 15, 30 & 45 days after sowing (DAS) were used as experimental treatments. The experiment was laid out in a randomized complete block design (RCBD) with three replications i.e. each replication contains nine (09) plots. So, total number of plots in the field experiment was 27. The size of unit plot was 4m² (2m x 2m) and plot to plot distance was 25cm. The total area of the experiment was 168m². The experimental field was divided into 3 blocks. The block to block distance was 25cm. Mungbean namely BARI mung-08 (Sunamung) was used as experimental planting material, which was developed by Bangladesh Agriculture Research Institute (BARI), Gazipur and this plant material was collected from the division of Pulse Research Centre, Shibganj, Bogura. It is a component division of BARI, Gazipur. On the other hand, Gibberellic Acid-3 (GA₃) was used as experimental treatment, which was collected from local market of Dinajpur district. A well-drained and medium high land was selected as experimental site. Land was prepared well through six (06) ploughing. The fertilizers were used in right proportion way. Total amount of all fertilizers were applied during land preparation except urea and MOP. One-fourth of urea and MOP were applied at the time of final land preparation. Some important fertilizers namely nitrogen, phosphorus, potassium, sulphur and zinc fertilizers were applied in form of urea, triple super phosphate, muriate of potash, gypsum and zinc sulphate at the rate of 220, 100, 60, 60 and 10 kg ha^-1, respectively. Morpho-physiological characters namely plant height (cm) and number of branch plant^-1 was measured with the help of scale meter. Morpho-physiological characters were analyzed by standard method. On the other hand, yield and yield attributes viz. pod length (cm), pod plant^-1, number of seeds pod^-1, 1000 seed weight, seed yield (t ha^-1), biological yield (t ha^-1), stover yield (t ha^-1) and harvest index (%) were determined by the standard method. Any height, length, number and yield were measured by using the manual count and scale meter. Seed yield and stover yield were all together regarded as biological yield. The obtained data were analyzed by MSTAT-C Statistical computer package program using the Analysis of variance technique and mean differences were adjudged by Duncan Multiple Range (DMRT) Test (Gomez and Gomez, 1984).

Source of Information: Asian J. Crop. Soil Plan. Nutri. | Volume 01, Issue 02, 28-36 | December 2019

Article Link (Online Journal): https://doi.org/10.18801/ajcsp.010219.05

Funding Source:

Budget:

Total Budget (Tk.) :

Achievement/Findings:

The present research confirms that application time of GA₃ at 30DAS and concentration of GA₃ at 100 ppm interact significantly effect on plant height, pod plant^-1, seed pod^-1 & harvest index and consequently to increase yield of BARI mungbean-8. Based on the results of this study, it may be concluded that for obtaining higher yield of BARI mung-8 (Sunamung) should be applied time of GA₃ at 30DAS and concentration of GA₃ at 100ppm in the study area.

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