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Effect of Row and Hill Spacing on the Yield Performance of Boro Rice (cv. BRRI Dhan45) Under Aerobic System of Cultivation

Mrs. R. Sultana
Department of Agronomy, Bangladesh Agricultural University, Mymensingh-2202, Bangladesh

M. M. Rahman
Department of Agronomy, Bangladesh Agricultural University, Mymensingh-2202, Bangladesh

M. H. Rahman
Department of Agronomy, Bangladesh Agricultural University, Mymensingh-2202, Bangladesh

Abstract/ Executive Summary:

An experiment was conducted at the Agronomy Field Laboratory, Bangladesh Agricultural University, Mymensingh during November 2008 to April 2009 to evaluate the effect of row and hill spacings on the yield of rice (cv. BRRI dhan45) under aerobic system of cultivation in boro season. Aerobic system is a new water efficient rice production system where the crop is grown by direct seeding on well prepared dry beds and also by maintaining the soil moisture at field capacity during the growing period. The experiment consisted of two row to row spacings viz. 20 and 25 cm, and five hill to hill spacings viz., 2.5, 5, 10, 15 and 20 cm. The trial was laid out in a randomized complete block design with 3 replications. Results revealed that the crop sown at 25 cm ×15 cm spacing produced the highest grain yield of 5.69 t ha^-1 whereas the lowest grain yield of 2.11 t ha^-1 was found with 20 cm × 2.5 cm spacing. The present study concludes that the highest grain yield of BRRI dhan45 during boro season under aerobic system of cultivation could be achieved by sowing at 25 cm ×15 cm spacing.

Keywords: Aerobic system, Boro rice, Hill spacing, Row spacing, Direct seeding, Yield

Location: Agronomy Field Laboratory, Bangladesh Agricultural University, Mymensingh

Start Date: 00-11-2008

End Date: 00-04-2009

Program Area: Crop-Soil-Water Management

Commodity: Rice

Objectives:

To evaluate the effect of row to row and hill to hill spacing on the yield performance of rice cv. BRRI dhan45 in boro season towards selecting the best spacing for rice under aerobic system of cultivation.

Methodology:

An experiment was conducted at the Agronomy Field Laboratory, Bangladesh Agricultural University, Mymensingh during November 2008 to April 2009. The area is located at 24°75' N latitude, 90°50' E longitude and at an altitude of 18 m. The land was medium high with moderate drainage facility and the soil was silt loam with pH value of 5.77. Soil contained 1.027% organic matter, 0.09% total N, 5.68 ppm available P, 49.12 meq 100 g^-1 exchangeable K and 82.8 ppm available S. The boro season is colder with scanty rainfall. The study was conducted with a view to evaluate the effect of row and hill spacings on the yield of performance rice (cv. BRRI dhan45) under aerobic system of cultivation in Boro season. The experiment comprised (a) two row to row spacing viz., 20 and 25 cm, and (b) five hill to hill spacings viz., 2.5, 5, 10, 15 and 20 cm. The trial was laid out in a randomized complete block design with 3 replications. The unit plot size was 4.0 m × 3.0 m and the distances between blocks and unit plots were 1.0 m and 0.75 m, respectively. The land was prepared by country plough at field capacity and the sowing was done on 29 November 2008. The land was applied with 10 tons of cowdung at the time of land preparation. Fertilizers were applied @ 104, 15, 60, 15 and 1.5 kg N, P, K, S and Zn, respectively in the form of urea, triple super phosphate, muriate of potash, gypsum and zinc sulphate. All the fertilizers except urea were applied during final land preparation. Urea was applied in four equal splits at 15, 30, 45 and 60 days after sowing. Seeds were primed by soaking in water for 24 h at room temperature followed by incubation at 35 ^oC for 30 h. After surface drying under shade, the primed seeds were dibbled directly in rows in the main field allocating four seeds hill^-1 as per experimental specification. Three hand weeding were done at 25, 50 and 60 days after sowing to control weeds. Experimental plots were irrigated 14 times to maintain normal growth and development of the crop. The soil was maintained at aerobic conditions during whole period of the season except for panicle initiation to flowering stage where wet condition was maintained. The crop was hand harvested at maturity. The harvesting was done on 29 April 2009 from the central 3 m x 2 m area. Five hills (excluding border hills) were randomly selected in each plot and uprooted before harvesting to record necessary data on various plant characters and yield attributes. The collected data on yield, plant characters and yield related attributes were analyzed statistically by using “Analysis of Variance Technique” and the means were compared following DMRT with the help of a statistical package programme MSTAT-C.

Source of Information: J. Bangladesh Agril. Univ. 10(1): 39–42, 2012

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

Based on the result of the present study it could be concluded that the highest grain yield of rice cv. BRRI dhan45 could be obtained by planting at 25 cm × 15 cm spacing under aerobic system of cultivation in boro season.

Knowledge Management: Journal