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Ffects of Plant Population and Bio-fertilizer on the Growth Parameters of Three Summer Mungbean

M.M. RANA
Scientific Officer
Agronomy Division, BTRI, Srimangal, Moulvibaza

A. K. M. S. H. C HOWDHURY
Professor
Department of Agronomy, Bangladesh Agricultural University (BAU), Mymensingh

M. S. U. B HUIYA
Professor
Department of Agronomy, BAU, Mymensingh, Bangladesh.

Abstract/ Executive Summary:

The experiment was conducted at the Agronomy Field Laboratory, Department of Agronomy, Bangladesh Agricultural University, Mymensingh from February to May 2004.Tallest plants at all the sampling dates were found in the 30 plants/m ². At harvest, significantly tallest plant was found with 30 plants/m ² (36.84 cm), followed by 45 plants/m ² (35.19 cm) and the shortest plant was noted with 60 plants/m² (33.59 cm). The plants under higher population became smaller might be due to shortage of nutrient, water and other related component elements.Plant height was also significantly affected by inoculation at all the sampling dates except 20 DAS and 50 DAS. treatments having maximum plant population (60 plants/m ² ) produced significantly highest dry matter at all sampling dates followed by 45 plants/m 2 . The lowest value was recorded under minimum plant population (30 plants/m ² ). However, at harvest, the highest dry matter weight (334.06 g/m ² ) was achieved at 60 plants/m² followed by 273.82 g/m 2 at 45 plants/m 2 and the lowest 216.37 g/m 2 from 30 plants/m 2 . The higher dry matter of 287.05 g/m 2 was obtained from inoculated plant at final harvest. Inoculation significantly increased the LAI at 35 DAS (0.25) and 65 DAS (1.10). It was 0.21 and 1.05 at the respective sampling dates under uninoculated condition. Crop growth rate (CGR) was affected significantly at all sampling period and increased with the increasing plant population and also with the age of plant. Peak period was observed at 51-65 DAS at all plant population, thereafter it declined. The highest CGR of 1.19, 5.06, 10.32, and 5.37 g/m 2 day were observed under 60 plants/m 2 and the lowest values of 0.66, 3.47, 7.67 and 2.46 g/m 2 day were noted at 30 plants/m 2 within the period 20-35, 36-50, 51-65, and 66 DAS-harvest, respectively. Inoculation significantly favoured CGR at all sampling duration except 36- 50 DAS It is evident that higher CGR of 1.10, 4.50, 9.22, and 4.05 g/m 2 day was found with inoculation and lower values of 0.83, 4.41, 8.25, and 3.75 g/m 2 day being observed with no inoculation condition during 20-35, 36- 50, 51-65 and 66 DAS-harvest, respectiv ely. The probable reason might be due to higher dry matter production with inoculated plant that ultimately showed higher CGR.

Keywords: Mungbean, Plant population, Bio-fertilizer, Growth

Location: Bangladesh Agricultural University, Mymensing

Start Date: 00-02-2004

End Date: 00-05-2004

Program Area: Crop-Soil-Water Management

Commodity: Mungbean

Objectives:

To find out the effect of plant population and bio-fertilizer on the growth parameters of summer mungbean cultivars.

Methodology:

The experiment was conducted at the Agronomy Field Laboratory, Department of Agronomy, Bangladesh Agricultural University, Mymensingh from February to May 2004. The experimental area was characterized by non- calcareous dark grey floodplain soil. The pH value of the soil was 6.7, low in organic matter and silty loam texture. Three sets of treatments were included in the experiment, which were (a) three plant populations: 30, 45, and 60 plants/m 2 , (b) two inoculations: no inoculation and inoculation and (c) three summer mungbean cultivars: Barimoog-2, Barimoog-5, and Binamoog-5. The experiment was laid out in a randomized complete block design (RCBD) with three replications with inter plot spacing of 0.5 m and inter block spacing of 1.0 m. The size of the unit plot was 10 m ² (5.0 m × 2.0 m) and the total number of plots was 54. At the time of final land preparation, each unit plot was fertilized with P and K @ 10 and 15 kg/ha (BINA, 2002), respectively. N @ 12 kg/ha was applied just before sowing the seeds. The bio-fertilizer (Bradyrhizobium inoculant BINA- MB-1) used in the present study was collected from the Bangladesh Institute of Nuclear Agriculture (BINA), Mymensingh. Seeds were inoculated following proper method and the uninoculated and inoculated seeds were sown in the noon and afternoon, respectively, in 25 cm apar t rows at about 3 cm depth and covered with soil. At 14 DAS, a plant counter of l00 × 100 cm was randomly placed in each plot and plants were counted. Thinning was done at 20 DAS to maintain the recommended plant population/m^2.Weeding, irrigation, drainage, insect control, etc. were done as when necessary. Data on growth parameters were collected by destructive plant sampling at 15-day intervals starting from 20 DAS to harvest. Five plants were harvested randomly from each plot.

Source of Information: Bangladesh J. Agril. Res. 36(3) : 537-542, September 2011, ISSN 0258-7122

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

The highest CGR of 1.19, 5.06, 10.32, and 5.37 g/m 2 day were observed under 60 plants/m 2 and the lowest values of 0.66, 3.47, 7.67 and 2.46 g/m 2 day were noted at 30 plants/m 2 within the period 20-35, 36-50, 51-65, and 66 DAS-harvest, respectively. Inoculation significantly favoured CGR at all sampling duration except 36- 50 DAS It is evident that higher CGR of 1.10, 4.50, 9.22, and 4.05 g/m 2 day was found with inoculation and lower values of 0.83, 4.41, 8.25, and 3.75 g/m 2 day being observed with no inoculation condition during 20-35, 36- 50, 51-65 and 66 DAS-harvest, respectively. The probable reason might be due to higher dry matter production with inoculated plant that ultimately showed higher CGR.

Knowledge Management: Journal