YIELD AND YIELD COMPONENTS OF TRANSPLANTED AMAN RICE WITH DIFFERENT PLANTING GEOMETRY

Abstract

The experiment was conducted at the experimental area of Sher-e-Bangla Agricultural University, Sher-e-Bangla Nagar, Dhaka during the period from June to November, 2013 to evaluate the yield and yield components of transplanted aman rice grown under different planting geometries. The experiment comprised of two factors denoted by Factor A: Planting geometry (PG) (4 levels designated PG1: 25 cm × 25 cm, PG2: 25 cm × 20 cm, PG3: 20 cm × 20 cm and PG4: 20 cm × 15 cm) and Factor B: rice variety (3 rice varieties- V1: BRRI dhan33, V2: BRRI dhan62 and V3: Chamak). The experiment was laid out in a randomized complete block design (RCBD) with three replications. In the case of planting geometry, the tallest plant (106.91 cm) at harvest was recorded from PG3, whereas the shortest plant (101.60 cm) was found from PG4. The longest panicle (24.87 cm) was recorded from PG3 whereas the shortest panicle (20.64 cm) from PG4. The highest grain yield (4.86 t ha-1) was recorded from PG3, while the lowest yield (3.70 t ha-1) from PG4. Moreover, the tallest plant (105.60 cm) was found from V3, while the shortest plant (102.78 cm) from V1. The longest panicle (25.26 cm) was observed from V3, while the shortest panicle (20.99 cm) from V1. The highest grain yield (5.16 t ha-1) was observed from V3, while the lowest yield (3.76 t ha-1) from V2. Due to the interaction effect of planting geometry and rice varieties, the tallest plant (111.06 cm) was observed from treatment combination of PG3V3 and the shortest plant (100.68 cm) from PG4V1. The longest panicle (27.70 cm) was observed from treatment combination of PG3V3 and the shortest panicle (19.50 cm) from PG4V1. The highest grain yield (5.72 t ha-1) was observed from treatment combination of PG3V3 and the lowest yield (3.04 t ha-1) from PG4V2. Planting geometry PG3 (20 cm × 20 cm) appeared with highest yield and was fact in all the varieties under trial. However, Chamak showed higher yield over the varieties studied in the experiment.