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Effect of Biofertilizer and Weeding on the Growth Characters and Seed Yield of Summer Mungbean

J. K. Pramanik
Department of AgronomyBangladesh Agricultural University, Mymensingh-2202, Bangladesh

A.K.M. Sayedul Haque Chowdhury
Department of AgronomyBangladesh Agricultural University, Mymensingh-2202, Bangladesh

F. M. Jamil Uddin
Department of AgronomyBangladesh Agricultural University, Mymensingh-2202, Bangladesh

Abstract/ Executive Summary:

An experiment was conducted at the Agronomy Field Laboratory, Bangladesh Agricultural University, Mymensingh from February to June 2010 to study the effect of bio fertilizer and weeding on the growth characters and yield of summer mungbean (cv. Binamoog-7). Experimental treatments comprised of (a) five levels of biofertilizer: 0, 1, 2, 3, 4 kg ha^-1 and (b) four levels of weeding: no weeding, one weeding, two weeding, and three weeding. The experiment was laid out in a randomized complete block design with three replications. The results indicate that the highest plant height (58.83cm) was obtained at 60DAS from 4 kg biofertilizer ha^-1 and the highest dry weight plant^-1 (17.78g) at 60DAS was produced from 2 kg biofertilizer ha^-1.Three times weeding produced highest plant height (41.69cm) and dry weight plant^-1 (18.09g) at 60DAS and seed yield (1.96 t ha^-1) was attained significantly at maximum level from the application of 2 kg ha^-1biofertilizer. Application of 2 kg biofertilizer ha^-1 with three times weeding was proved to be the best possible combination.

Keywords: Biofertilizer, Growth, Seed yield, Weeding

Location: Agronomy Field Laboratory, Bangladesh Agricultural University,Mymensingh

Start Date: 00-02-2010

End Date: 00-06-2010

Program Area: Crop-Soil-Water Management

Commodity: Mungbean

Objectives:

1. To estimate the effect of biofertilizer and weeding on the growth characters and seed yield of mungbean.

Methodology:

The experiment was conducted at the Agronomy Field Laboratory. Bangladesh Agricultural University, Mymensingh from February to June 2010. The experimental field was located at 24.75° North latitude and 90.50° East longitude at an altitude of 18 m from the sea level. The experiment was laid out in a randomized complete block design. There were three replications. The unit plot size was 5 m² (2 m × 2.5 m).The block and unit plots were separated by 1m and 0.75m spacing, respectively. The total number of unit plots was 60. Different levels of biofertilizer were placed in the main plots and weeding levels in the sub plots. All the treatments were randomly allocated to the experimental plots. There were five levels of biofertilizer as follows: I₀ = Control (no biofertilizer), I₁ = 1.0 kg ha-1biofertilizer, I₂ = 2.0 kg ha-1bioiertilizer, I₃ = 3.0 kg ha^-1biofertilizer, I₄ = 4.0 kg ha^-1biofertilizer and four levels of weeding W₀ = No weeding, W₁ = One weeding (15 DAS), W₂ = Two weeding (15 DAS and 30 DAS) and W₃ = Three weeding (15 DAS,30 DAS and 45 DAS) were used in the experiment: Summer mungbean variety Binamoog-7 was used as the experimental crop. Liquid broth of BINA-MB mix culture, a mixture of three sBradyrhizobium strains viz. BINA-MB-441, BINA-MB-169 and BINA-MB-301, were used in this experiment. The Bradyrhizobium strains used in the present study were collected from the Soil Microbiology Laboratory of Bangladesh Institute of Nuclear Agriculture (BINA), Mymensingh. The experimental plot was opened with a power tiller on 15 February 2010 and subsequently ploughed twice with country plough followed by laddering to achieve a medium tilth required for the crop. The land was finally prepared on 2 March 2010 by country plough followed by laddering.The unit plots were uniformly fertilized with, triple super phosphate and muriate of potash at the rate of 75 and 40 kg ha^-1, respectively, during final land preparation. The quantity of seed required for each plot was weighed on the basis of experimental specification and kept in polythene bags. The seeds were mixed with molasses for adhering to the biofertilizer. Then the biofertilizer was mixed thoroughly with the seed as per treatments and the seeds were placed in a cool dry place to avoid sticking together. The seeds were sown continuously in 30cm apart row spacing about 3cm depth in the afternoon of 3 March, 2010. After sowing, the seeds were covered with soil to preserve moisture. Thinning was done after 15 days of sowing to maintain a uniform plant population. Weeding were done as per treatment i.e. 15 plots remained unwedded, one weeding was done in 15 plots at 15 DAS, two weeding were done in 30 plots at 15 DAS and 30 DAS and three weeding were done in 45 plots at 15 DAS,30 DAS and 45 DAS. Irrigation was not given at the early stages of crop growth, as there was no symptom of moisture stress. However, there was heavy rainfall on middle April to middle May 2010.The excess water was removed from the field at that time. The insecticide Malathion 57EC was sprayed @1.51 ha^-1 at the time of 50% pod formation stage to control pod borer. Crops were frequently monitored to note any change in plant, character, crops looked good since the initial stage and they maintained a satisfactory growth till harvest. At the time when 80% of the pods turned brown in color, the crop was assessed to attain maturity. The crops were harvested from central 2 m² area of each plot for yield data on different dates as they attained maturity. The crop bundles were sun dried for two days by placing them on threshing floor. Seeds were separated from the plants by beating the bundles with wooden sticks. The collected seeds were dried in the sun for reducing the moisture to about nearly 14% level. The dried seeds were cleaned and weighed plot^-1. The collected data were compiled and analyzed statistically using the analysis of variance technique (ANOVA) for each of the characters under study was done by F (variance) ratio. The differences among treatment means were adjudged by Duncan’s Multiple Range Test with the help of a computer based package programmed MSTAT-C.

Source of Information: J. Environ. Sci. & Natural Resources, 7(1): 87–92, 2014; ISSN 1999-7361

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

It is revealed that growth characters and seed yield were significantly influenced by different levels of bio fertilizer and weeding. The highest dry weight per plant and seed yield (2.34 t ha^-1) was produced from seed inoculated with bio fertilizer @ 2 kg ha^-1 with three weeding. The results obtained in this experiment also indicated that there is scope to increase the yield of mungbean by applying more weeding and using proper dose of bio-fertilizer in Binamoog-7.

Knowledge Management: Journal