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Effects of Varieties and Row Spacing on the Growth and Yield of Aus Rice

Tuhin Suvra Roy
Department of Agronomy, Sher-e-Bangla Agricultural University, Sher-e-Bangla Nagar, Dhaka-1207

Sonia Khatun
Department of Agronomy, Sher-e-Bangla Agricultural University, Sher-e-Bangla Nagar, Dhaka-1207

Md. Anwar Hussain
Department of Agronomy, Sher-e-Bangla Agricultural University, Sher-e-Bangla Nagar, Dhaka-1207

Md. Mahfuzar Rahman
Department of Agronomy, Sher-e-Bangla Agricultural University, Sher-e-Bangla Nagar, Dhaka-1207

Md. Ashraful Islam Pulok
Seed Technology Discipline, Sher-e-Bangla Agricult ural U niversit y, Sher-e-Bangla Nagar, Dhaka-1207

Abstract/ Executive Summary:

A field ex periment was conducted at Sher-e-Bangla Agricultural University, Dhaka, during the period from April to August 2010 to investigate the effect of variety and row spacing on morpho-physiological characters, yield attributes and yield of Aus rice. The ex periment comprised four varieties, viz., BR26, BRRI dhan42, BRRI dhan43 and BRRI dhan48 and four row spacings, viz., 15, 20, 25 and 30 cm. The plant to plant distance w as 15 cm. The ex periment was laid out in two factors randomized complete block design with three replications. The plant height, effective tiller number hill^-1, total dry mass (TDM) hill^-1, absolute growth rate (AGR), relative growth rate (RGR), grain yield, harvest index (HI), and yield attributes were significantly influenced by row spacing in rice. Results revealed that plant height increased with decreasing row spacing while number of effective tillers and total tillers hill^-1, TDM hill^-1, AGR and RGR, filled and unfilled grains hill^-1 increased with increasing row spacing but in case of unit area basis, the grain and straw yield and HI were greater at closer row spacing than w ider spacing. The higher grain and straw yield and HI were observed in 15 and 20 cm row spacings compared to 25 and 30 cm spacings with being the highest in 20 cm row spacing (3.42 and 5.68 t ha^-1 for grain and straw yield, respectively). While the lowest grain and straw yield per hectare w as recorded in 30 cm row spacing. Among the varieties, BRRI dhan48 w as superior in relation to plant height, TDM hill^-1, AGR, RGR, total tiller number hill^-1and 1000-grain weight which resulted the highest grain yield hectare^-1 (3.97 t ha^-1. In contrast, the lowest above studied parameters were observed in BRRI dhan42 and resulted the lowest grain yield hectare^-1 (2.58 t ha^-1). The interaction effect of variety and row spacing on plant parameters was significant except 1000-grain w eight. BRRI dhan48 in combination with any of the 4 spacings produced a higher grain yield than each of the combinations made by the rest three varieties with the spacings and the highest grain yield 4.40 t ha^-1was obtained by the variety BRRI dhan48 w ith the row spacings 20 cm. BR 26 in the interaction effect performed better than those of BRRI dhan42 and BRRI dhan43 and the low est yield 1.90 t ha^-1 was obtained by BRRI dhan42 with 30 cm row spacing.

Keywords: Aus rice, Variety, Rrow spacing, Growth and yield

Location: Sher-e-Bangla Agricultural University, Dhaka

Start Date: 00-04-2010

End Date: 00-08-2010

Program Area: Crop-Soil-Water Management

Commodity: Rice

Objectives:

1. To study the effect of different row spacing on growth and yield of four aus rice varieties

2. To find out the suitable row spacing for maximizing grain yield in Aus rice varieties and

3. To assess the interaction effect of row spacing and variety in Aus rice.

Methodology:

The experiment was carried out at the experiment of field, Sher-e-Bangla Agricultural University, Dhaka, during the period from April to August 2010. The location of the site is 23.774⁰ N latitude and 90.335⁰ E longitudes with an elevation of 8.2 m from sea level. The experiment was laid out in two factors randomized complete block design with three replications. Two factors were included in the study as mention : four varieties were taken as test crop, viz., BR26 (V₁), BRRI dhan42 (V₂), BRRI dhan43 (V₃) and BRRI dhan48 (V₄) and four row spacing of 15 cm (S₁), 20 cm (S₂), 25 cm (S₃) and 30 cm (S₄). There were 48 unit plots in the experiment. The size of each unit plot was 4.0 m × 3.0 m. A fertilizer dose of 75-60-34-5.0 kg ha^-1 of TSP, MP, gypsum and zinc sulphate, respectively, was applied at the time of final land preparation. Urea was applied @ 200 kg ha^-1 at three times equal splits at 15, 35 and 50 days after transplanting(DAT). Sprouted seeds were sown in the wet nursery bed on 10 April 2010. The layout of the experimental field was done on 10 April 2010 according to the design adopted. Seedlings were transplanted on well-puddled experimental plots on 10 April at the rate of two seedlings per hill maintaining spacing according to the treatments. After sampling, the crop was harvested plot-wise at full maturity. Two harvests were made at 35 and 50 days after transplanting to study growth characteristics from each sampling, five hills were randomly selected from each plot and uprooted for collecting necessary parameters. The growth analysis like AGR and RGR were carried out following the standard formulae. Data were collected on plant height (cm), number of total tillers, number of effective tillers, number of non-effective tillers, spikelets panicle^-1 (no.), unfilled spikelets panicle^-1 (no.), weight of 1000-grain (g), grain yield(t ha^-1), straw yield(t ha^-1) and harvest index (%). The collected data were analyzed statistically following the analysis of variance technique and the mean differences were adjudged with Duncan’s Multiple Range Test (DMRT) using the statistical computer package program, MSTAT-C.

Source of Information: BANGLADESH RESEARCH PUBLICATIONS JOURNAL; ISSN: 1998-2003, Volume: 10, Issue: 2, Page: 138-144, July - October, 2014

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

Based on the experimental results, it may be concluded that the effect of row spacing had tremendous effect on morphological growth, yield attributes and yield in aus rice; the variety BRRI dhan48 performed 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- 28.

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