PERFORMANCE OF PHOTOPERIOD SENSITIVE RICE PLANTED AT VARIABLE PLANTING DENSITY IN LATE AMAN SEASON

Abstract

Experiments were conducted at the Bangladesh Rice Research Institute (BRRI) farm, Gazipur to determine the optimum planting density of photoperiod-sensitive rice for late Aman season. Forty-five day old seedling of BR22, BR23 and Nizersail were planted on 21 September in 1989 and on 27 September in 1990 at 25x25 cm, 25x20 cm, 25x15 cm, 20x15 cm, 15x15 cm and 15x10 cm spacing. The number of panicles and grain yield increased with increase of plant density up to 44 hills/m2 (15x15 cm). The 1000-grain weight remain unaffected over varied plant density.