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Effect of Row Spacing on Morpho-physiological Characters in Aus Rice

M. Monjurul Alam Mondal, PhD
Principal Scientific Officer
Crop Physiology Division, Bangladesh Institute of Nuclear Agriculture, BAU Campus, Mymensingh-2202, Bangladesh

Abstract/ Executive Summary:

A field experiment was conducted during the period from April to August 2011 to investigate the effect of variety and row spacing on yield attributes and yield of Aus rice. The experiment comprised of four varieties viz., BR-26, BRRI dhan42, BRRI dhan43 and BRRI dhan48 and four row spacings viz. 15, 20, 25 and 30 cm. The higher grain and straw yield per hectare and HI was observed in 15 and 20 cm row spacings with being the highest in 20 cm row spacing. In contrast, the lowest seed and straw yield per hectare was recorded in 30 cm row spacing for lower accommodation of plants per unit area. Among the varieties, BRRI dhan48 was superior in relation to TDM hill^-1, AGR, total tiller number hill^-1 and 1000-grain weight which resulting the highest grain yield hectare^-1. In contrast, the lowest above studied parameters were observed in BRRI dhan43 and resulting the lowest seed yield per hectare. The varieties BR-26 and BRRI dhan48 produced the highest yield in 20 cm row spacing with superior dry matter partitioning to economic yield. The other two varieties of BRRI dhan42 and BRRI dhan43 produced the highest seed yield in 15 cm row spacing.

Keywords: Rice, Row spacing, Yield

Location: At the experimental field of Bangladesh Agricultural University, Mymensingh, Bangladesh

Start Date: 10-04-2011

End Date: 26-08-2011

Program Area: Crop-Soil-Water Management

Commodity: Rice

Objectives:

To find out optimum row spacing for maximizing grain yield based on morpho-physiological attributes of recently released Aus rice varieties.

Methodology:

The experiment was conducted at the experimental field of Bangladesh Agricultural University, Mymensingh, Bangladesh during the period from April to August 2011. Four widely cultivated varieties namely BR-26, BRRI dhan42, BRRI dhan42 and BRRI dhan48 were used in the experiment. Four row spacings of 15, 20, 25 and 30 cm were considered in the experiment. Within row, the hill to hill distance was 15 cm. A split plot layout with three replications was used where variety was placed in the main plot and row spacing was placed in the sub-plot. The unit plot size was 3.0 m × 3.0 m. A fertilizer dose of 75-60-34-5.0 kg ha^-1of TSP, MP, gypsum and zinc sulphate, respectively, was applied at the time of final land preparation. Urea was applied @ 200 kg ha^-1at three times equal splits at 15, 35 and 50 days after transplanting (BARC 2005). Thirty-day old seedlings were transplanted 10 April 2011 at the rate two seedlings hill^-1maintaining different spacings according to treatments. Different intercultural operations such as weeding, irrigation and pesticide spray were done as and when necessary. To growth study, two harvests were made at 35 and 50 DAT. Five hills from each plot were randomly selected and uprooted for obtaining data of necessary parameters. The plants were separated into leaves, stems and roots and the corresponding dry weights were recorded after oven dry at 80 ± 2 ⁰C for 72 hours. The growth analyses like absolute growth rate and relative growth rate were analyzed according to Hunt (1978). The yield contributing characters were recorded at harvest from ten competitive plants of each plot. The grain and straw yield was recorded from plot and converted into grain weight hectare^-1. The collected data were analyzed statistically by using computer package programme.

Source of Information: International Journal of Sustainable Crop Production, 7 (1): 34-37 (2012)

Article Link (Online Journal):

Funding Source:

1. Government

Budget:

Total Budget (Tk.) :

Achievement/Findings:

The effect of row spacing had tremendous effect on morphological and growth, yield attributes and yield in Aus rice. The variety BRRI dhan48 showed best regarding yield performance; and The row spacing of 20 cm for BR-26 and BRRI dhan48 and the row spacing of 15 cm for BRRI dhan42 and BRRI dhan43 appears to be the best among the treatments regarding yield of Aus rice for AEZ-9.

Knowledge Management: Journal