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Effect of planting geometry on yield and yield attributes of aromatic rice genotypes

Muhammad Ebrahim Khalil, Kaium Chowdhury, Ayman EL Sabagh, Mohammad Sohidul Islam

Abstract


To evaluate the effects of plant spacing on the growth and yield of aromatic rice varieties, a field experiment was carried out at the Agronomy Filed Laboratory, Bangladesh Agricultural University, Mymensingh, Bangladesh during aman season. Four plant spacings viz. 25cm x 25cm (S1), 20cm x 20cm (S2), 20cm x 15 cm (S3) and 15 cm x 10cm (S4) and four fine rice varieties viz. Basmoti 370 (V1), BRRI dhan37 (V2), BRRI dhan38 (V3) and Kailijira (V4) were used. As factorial arrangement the experiment was fitted in a randomized complete block design with three replications. All agronomic practices were applied as recommended for each cultivar. The result revealed that the BRRI dhan38 produced the highest 1000-grain weight (19.05g) as well as yield (3.62 t ha-1). Oppositely, the V2 produced the maximum tillers hill-1 (11.7), effective tillers hill-1 (9.5) but the poorest 1000 grain weight (14.81g) compared to V3 resulting in the second highest grain yield (3.30 t ha-1). The highest number of spikelets panicle-1 (175.0), grain panicle-1 (126.6) and sterile spikelets (48.6) but the lowest number of effective tillers hill-1 (7.4) and minimum 1000 grain weight (10.25g) were recorded at Kailijira (V4) resulting the lowest grain yield (2.27 t ha-1) at Kailijira. The results that the widest spacing S1 produced the tallest plant stature (147.5cm), the highest number of tillers hill-1 (14.0), effective tillers hill-1 (11.0), total spikelets panicle-1 (124.2), filled grain panicle-1 (102.0) while the lowest number of sterile spikelets (22.4). In terms of m-2 basis, all the characteristics were lowered compared to the spacing of 20cm x 15 cm resulting in the lowest grain yield (2.66 t ha-1). The variety BRRI dhan38 at the spacing of 20cm x 15cm produced significantly the highest grain yield (4.27 t ha-1) and the second highest grain yield was (4.00 t ha-1) recorded in BRRI dhan37 with the same spacing.

References


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