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Research Detail

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K.K. Sarkar
Department of Agronomy and Agricultural Extension, University of Rajshahi, Rajshahi

M.A. Rahman*
Department of Agronomy and Agricultural Extension, University of Rajshahi, Rajshahi

A study was carried out at the Agronomy Field Laboratory, Department of Agronomy and Agricultural Extension, University of Rajshahi, Bangladesh, during the period of July to December' 2007 to study the response of aromatic rice genotypes on the yield and yield attributing characters at different spacings. Plant genotypes viz. Kataribhog, Kalijira and Chiniatop were tested against six levels' of spacing viz. 15cmx15cm, 20cmx15cm, 25cmx15cm, 30cmx15cm, 35cmx15cm and Haphazard. The experiment was laid out in a randomized complete block design (RCBD) with three replications. Variety and spacing had a significant influence on the yield and yield contributing characters of aromatic rice. The variety Kataribhog produced the highest number of tillers hill-1, effective tillers hill-1, filled grains panicle-1, 1000-grain weight and straw yield; lowest number of non-effective tillers hill-1and unfilled grains panicle-1 and consequently produced the highest grain yield (3.084 t ha-1). While the variety, Kalijira produced lowest grain yield (2.228 t ha-1). On the other hand, the widest spacing (35cmx15cm) produced the highest number of effective tillers hill-1, grains panicle-1, filled grains panicle-1 and lowest biological yield. The spacing 20cmx15cm produced the highest grain yield (2.88 t ha-1). Grain yield was positively correlated with number of tillers hill-1, effective tillers hill-1 and 1000-grain weight.

  Aromatic rice, Spacing, Yield.
  Agronomy Field Laboratory, Department of Agronomy and Agricultural Extension, University of Rajshahi, Bangladesh
  00-07-2007
  00-12-2007
  Crop-Soil-Water Management
  Rice, Aromatic rice

The optimum spacing ensures the plant to grow in their both aerial and under ground parts through efficient utilization of solar radiation and nutrients. Though wider space allowed the individual plants to produce more tillers but it provides the smaller numbers of hills planted in per unit area. So, it is of utmost importance to determine optimum spacing for the aromatic rice varieties to maximize their yield. The purpose of the study is to evaluate the effect of variety and spacing on the yield and yield contributing characters of aromatic rice.

The research was conducted at the Agronomy Field Laboratory (240 22'36" N Latitude, 88038'27" E Longitude and 20 m altitude), Department of Agronomy and Agricultural Extension, University of Rajshahi, Rajshahi, Bangladesh during the period from July to December 2007. The experimental site was under the humid tropical climate which is characterized by heavy rainfall, high humidity and high temperature during monsoon and scanty rainfall, low humidity and low temperature during winter. The land was medium high belonging to the calcareous dark grey flood plain soil type (Gangetic Alluvial Soil Tract). The soil properties of the field were pH 8.6, organic matter 0.48%, total available nitrogen 0.04%, available phosphorus 11.25ppm, available potassium 58 ppm and available sulphar 25.65 ppm. The treatments of the experiment include three rice varieties viz. Kataribhog, Kalijira and Chiniatop and six spacings viz. 15cmx15cm, 20cmx15cm, 25cmx15cm, 30cmx15cm, 35cmx15cm and Haphazard. The experiment was laid out in a randomized complete block design (RCBD) with three replications.The unit plot size was 10 m2 (4mx2.5m). The seeds were sown in nursery bed on 6`11 July, 2007.The experimental land was uniformly fertilized with nitrogen (N), phosphorous (P205), potash (K20), sulphur and zinc fertilizers @ 60, 40, 40, 10, 5 kg ha-1 respectively, as urea, triple super phosphate, muriate of potash, gypsum and zinc oxide. The whole amount of triple super phosphate, muriate of potash, gypsum, zinc oxide and 1/3 of urea were applied as basal dose during final land preparation. The 2/3 amount of Urea was applied as topdressing in two equal splits. The first split was applied at active tillering stage at 30 DAT (days after transplanting) and the second split was applied before panicle initiation stage. Finally, 30-day old seedlings of the three varieties were transplanted in the well-puddled plots as per foresaid spacing with two seedlings hill-1 on 5 August, 2007.

Kataribhog, Kalijira and Chiniatop were harvested at maturity on 11th November, 5111 December and 6111 December respectively. Data were recorded on yield parameters at final harvest. The collected data were analyzed statistically using the analysis of variance (ANOVA) technique and the mean differences were adjudged by Duncan's New Multiple Range Test (Gomez and Gomez, 1984) with the help of MSTAT software.

  South Asian J. Agric. 2009.4 (I &2): 40-44 ISSN 1991-0037
  
Funding Source:
1.   Budget:  
  

Results revealed that harvest index influenced significantly due to variety. From the study it was observed that, Kataribhog showed the highest harvest index (32.497%). While, Kalijira showed the lowest harvest index (26.886%). The result showed that spacing was insignificant with respect to harvest index.

  Journal
  


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