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Effect of Bradyrhizobium and Azotobacter on Growth and Yield of Mungbean Varieties

Nazmun Ara
Department of Soil Science, Bangladesh Agricultural University, Mymensingh-2202, Bangladesh

M. Rokonuzzaman
Chittagong Veterinary and Animal Sciences University, Khulshi, Chittagong-4202, Bangladesh

M. N. Hasan
Soil Resource Development Institute, Krishi Khamar Sarak, Farmgate, Dhaka-1215, Bangladesh

Abstract/ Executive Summary:

A field experiment was conducted at the Soil Science Field Laboratory of Bangladesh Agricultural University (BAU), Mymensingh during the period from January to April 2004 to study the effects of Bradyrhizobium and Azotobacter inoculation on growth and yield of mungbean varieties. There were ten treatment combinations taking two varieties of mungbean viz. BARI mung-3 and BARI mung-4, and five bacterial and chemical fertilizers viz.control, Bradyrhizobium, Azotobacter, Bradyrhizobium plus Azotobacter and 20 kg N ha^-1. The experiment was laid out in a split plot design with three replications assigning varities in main plots and bacterial and chemical fertilizers in subplots. The unit plot size was 4 m x 3 m. After 35 days of sowing, 10 plants were randomly uprooted from each plot to study nodulation. At maturity yield and yield contributing characters were recorded. Variety BARI mung-3 recorded significantly higher nodule number and weight, and shoot weight compared to BARI mung-4. On the other hand, BARI mung-4 produced significantly higher seed and stover yields than BARI mung-3 did. Application of Bradyrhizobium or Azotobacter or their combination significantly increased nodulation, and root and shoot weights at 35 days after sowing. Similarly, the number of seeds pod^-1 and seed yield were significantly influenced by the bacterial biofertilizer. These results indicate that use of both Bradyrhizobium and Azotobacter inoculants appears to be an effective method for successful mungbean production at BAU farm.

Keywords: Growth, Yield, Mungbean, Bradyrhizobium and Azotobacter

Location: Soil Science Field Laboratory of Bangladesh Agricultural University (BAU), Mymensingh

Start Date: 00-01-2004

End Date: 00-04-2004

Program Area: Crop-Soil-Water Management

Commodity: Bio fertilizer

Objectives:

1. To investigate the effects of Bradyrhizobium and Azotobacter on growth and yield of mungbean.

Methodology:

A field experiment was conducted at the Soil Science field Laboratory of Bangladesh Agricultural University (BAU), Mymensingh during the period from January to April 2004 to study the effects of Bradyrhizobium and Azotobacter inoculation on growth and yield of mungbean varieties. Growth characters were: number of effective nodules plant^-1, nodule weight, root weight and shoot weight; and yield contribution characters were: pod length, number of pods plant^-1, seeds pod^-1, 1000-seed weight and stover yield. There were ten treatment combinations taking two varieties of mungbean viz BARI mung-3 and BARI mung-4, and five bacterial and chemical fertilizers viz. control, Bradyrhizobium, Azotobacter, Bradyrhizobium plus Azotobacter and urea @ 20 kg N ha^-1. The experiment was laid out in a split plot design with three replications assigning varieties in the main plots and bacterial and chemical fertilizers in the subplots. The unit plot size was 4 m X 3 m. After 35 days of sowing, 10 plants were uprooted from each plot to study nodulation. At maturity yield and yield contributing characters were recorded. The data were analyzed statistically using Analysis of Variance technique and differences among treatment means were adjudged by Duncan’s Multiple Range Test.

Source of Information: J. Bangladesh Agril. Univ. 7(1): 7–13, 2009; ISSN 1810-3030

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

There was statistical difference between the two varieties of mugbean in seed yield. The variety BARI mung - 4 produced significantly higher seed yield (1007 kg ha^-1) compared to that of BARI mung - 3 (947 kg ha^-1). The different bacterial fertilizers exerted significant effect on the seed yield of mungbean. The use of Bradyrhizobium inoculants (F₂) or Azotobacter inoculants (F₃) produced significant increase over uninoculated control (F₁) and 20 kg N ha^-1 (F₅) application. The highest seed yield of 1165 kg ha^-1 was noted when both Bradyrhizobium and Azotobacter inoculants (F₄) were used together.

Knowledge Management: Journal