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Effect of Irrigation Timing on Yield and Yield Contributing Characteristics of Soybean

M.N. Huda
Mennonite Central Committee (MCC), P.O. Box No. 5, Noakhali-3800, Bangladesh

M.A. Nazir
Natural Environment Preservation Society (NEPS), Kazi Nazrul lslam Road, Mymenslngh-2202

Abstract/ Executive Summary:

A field experiment was conducted from January 1998 to April 1998 at the Mennonite Central Committee (MCC) Research Station to study the Influence of irrigation on nodulation, yield and the agronomic performance of the soybean variety, Shohag. Different irrigation treatments at the vegetative, flowering, pod-formation and seed-filling stages showed significant effects on nodule formation, the number of pods/plant, plant height and yield at a 5% level of significance. The highest yield of 1752 kg/ha was produced when the crop was irrigated during the vegetative, flowering and pod-formation stages, compared to the yield In non-irrigated plots of 940 kg/ha. The study also revealed that irrigation improved nodule formation with peat rhizobia and produced higher soybean yields on clay-loam soil during the winter season in the Noakhali region.

Keywords: Soybean, Irrigation, Timing, Nodulation, Yield

Location: Mennonite Central Committee Research Station, Noakhali

Start Date: 00-01-1998

End Date: 00-04-1998

Program Area: Crop-Soil-Water Management

Commodity: Irrigation scheduling

Objectives:

To investigate the effect of irrigation on different growth parameters, and
To find out the yield potential of soybeans during the winter.

Methodology:

The field experiment was conducted from January 1998 to April 1998 at the Mennonite Central Committee Research Station, Noakhali, The topography of the land was medium high. The soil of the experimental area was analyzed, and found as clay-loam texture with pH 5.8 and bulk density ranged from 1.43-1.52 gm/cm³. RCBD was followed in the experiment with three replications having unit plot size of 5m x 10m with a 1.5 m buffer zone to prevent seepage between the blocks and plots. Fertilizers were applied during land preparation at the rate of 0:65:80:15 kg of NPKS/ha, respectively, in the form of urea, triple super phosphate, muriate of potash, and gypsum. Soybean inoculant was applied at the rate of 20 g/kg of soybean seed. Plots were sown on January 7, 1998 in rows with plant spacing of 25 cm x 8 cm. Flood irrigation was practiced throughout the season in the research plots.

Source of Information: Bangladesh J. Agril. Sci. 29(1): 145-149, January, 2002

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

Irrigation in soybean enhances rhizobia nodulation, plant growth and yield. This relationship is a critical factor in the adaptation of soybean to winter season production in Bangladesh. Based on the findings of this study, irrigation at the vegetative, flowering and pod formation stages is recommended for soybean production in the winter season. Further research on different moisture levels at various soil depths and on plant evapo-transpiration is needed to fully understand soybean response to irrigation for yield optimization and water-use efficiency.

Knowledge Management: Journal