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Chlorophyll Synthesis, Growth and Yield Performance of Summer Mungbean Cv. BARI Moog-6 in Response to Bap and Naa

BIKASH C SARKER*
Department of Agricultural Chemistry, Hajee Mohammad Danesh Science and Technology University, Dinajpur-5200, Bangladesh

MAI TALUKDER
Department of Agricultural Chemistry, Hajee Mohammad Danesh Science and Technology University, Dinajpur-5200, Bangladesh

B ROY
Department of Chemistry, Hajee Mohammad Danesh Science and Technology University, Dinajpur 5200, Bangladesh.

Abstract/ Executive Summary:

Effects of plant growth regulators (PGRs) on physiology, growth and yield attributes of summer mungbean (Vigna radiata L.) CV. BARI moog-6 were investigated. Two PGRs, namely NAA and BAP with three concentrations of each viz., 50, 100, 150 ppm and fresh water as control were applied as foliar spraying at vegetative and pre-flowering stage. Application of BAP and NAA had positive impact on the morphophysiological characteristics of summer mungbean. Spraying of PGRs at 150 ppm showed the highest performance regarding plant height, number of leaves per plant, leaf length, leaf breadth, root nodule number, chlorophyll and carotenoid contents, pod length, and seed yield of mungbean. Spraying BAP at 150 ppm concentration produced the highest seed yield (1.56 t/ha) followed by 150 ppm NAA (1.54 t/ha).

Keywords: BAP, Growth, PGR, Summer mungbean, NAA, Yield

Location: In the research farm of Hajee Mohammad Danesh Science and Technology University, Dinajpur

Start Date:

End Date:

Program Area: Crop-Soil-Water Management

Commodity: Growth regulator, Mungbean

Objectives:

Many research works have been carried out with plant growth regulators (PGR) in different crops all over the world. But in Bangladesh research work with PGR on changing the morphological and physiological characteristics for yield increase of mungbean is limited. Thus attempts were made to investigate the vegetative growth, chrolophyll synthesis, number of root nodules and seed yield in response to BAP and NAA application.

Methodology:

The experiment was conducted in the research farm of Hajee Mohammad Danesh Science and Technology University, Dinajpur. Land was fertilized by urea, triple super phosphate (TSP) and muriate of potash (MOP) at 45, 100 and 55 kg/ha, respectively (Afzal et al. 1999). After sowing of seeds, weeding followed by thinning was done at 20 and 40 days after sowing (DAS). The plots were irrigated as and when necessary. Proper plant protection measures were taken to protect plants from pest and diseases. The PGRs - BAP and NAA were sprayed at 50 ppm (T2), 100 ppm (T3) and 150 ppm (T4) at vegetative and pre-flowering stages. Fresh water was sprayed as control (T1). The experiment was laid out in a completely randomized block design (CRBD). Three plants randomly selected from each plot were uprooted carefully to ensure no root damage and the root nodule numbers were counted at 20, 40 and 60 DAS. Three plants from each plot were selected randomly and data were taken at 20, 40, 60 and 80 DAS on the following traits- plant height, number of leaves per plant, leaf length, and leaf breadth, respectively. The chlorophyll pigments (Chlorophyll a,b and carotenoid) of mungbean leaf were determined from the young leaves at flowering stage by the method described by Arnon (1949). Among yield components, data of pod length, number of seed/pod, and seed yield were recorded. The collected data were analyzed statistically using the ANOVA technique with the help of computer by MSTAT-C program. The treatment means were compared by DMRT (Gomez and Gomez 1984) at 5% level of significance.

Source of Information: Bangladesh J. Bot. 50(2): 209-217, 2021 (June)

Article Link (Online Journal): DOI: https://doi.org/10.3329/bjb.v50i2.54075

Funding Source:

Budget:

Total Budget (Tk.) :

Achievement/Findings:

Application of 150 ppm of BAP was statistically similar with the same level of NAA but numerically the yield was little higher with BAP than the same level of NAA. The 25.42% increased yield was found with the application of 150 ppm of BAP than control while with the same level of NAA, i.e., 150 ppm gave 25.02% increased yield in summer mungbean than the control treatment, respectively. The stimulatory effect regarding yield was 0.97% higher in BAP than NAA. The finding is also in well agreement with the observations made by Ferdous et al. (2012). The BAP and NAA applications had profound influence upon the morphological and physiological characteristics on summer mungbean. Either BAP or NAA application at 150 ppm at vegetative and pre-flowering stages had remarkable influence for plant growth, yield and yield contributing characteristics of mungbean. Increased root nodule formation might benefit to add biological N2 to soil resulting in eco-friendly N-nutrition in soil. The increased amount of chlorophyll-a, -b, and total chlorophyll had positive role in preparing photosynthates which in turn help in improving growth and yield in summer mungbean. Therefore, the twice spraying of BAP @150 ppm performed better over NAA for maximizing summer mungbean cv. BARI moog-6.

Knowledge Management: Journal