Growth analysis of short duration transplanted Aus rice (cv. Parija) under three agronomic practices

Abstract

An experiment was conducted at the Agronomy Field Laboratory, Bangladesh Agricultural University, Mymensingh to investigate the growth of short duration transplanted Aus rice (cv. Parija) under three agronomic practices. The study comprised of two nursery seeding densities viz. 40 and 80 g seeds m-2, three ages of seedlings viz. 20, 30 and 40-day old, and three levels of seedlings hill-1 viz. 2, 4 and 6 seedlings hill-1. The experiment was laid out in a Randomized Complete Block Design with three replications. For individual treatment effects, the highest plant height, number of tillers hill-1, total dry matter, leaf area index and crop growth rate were found when seedlings were raised @ 40g seed m-2 and 30-day old seedlings were transplanted @4 seedlings hill-1. In interaction, the highest number of tillers hill-1 (13.00) and total dry matter (22.93 g) at 45 DAT, and crop growth rate (6.71 g m-2 day-1) at 15-30 DAT were obtained from the interaction among 40 g seed m-2 × 30-day old seedlings × 4 seedlings hill-1. On the other hand, the tallest plant (73.27 cm) at 45 DAT was found from the interaction among 80 g seed m-2 × 30-day old seedlings × 4 seedlings hill-1, while the highest leaf area index (2.87) was recorded from the interaction of 40 g seed m-2 × 30-day old seedlings × 2 seedlings hill-1 at 50 DAT. Considering both the significant individual and interaction treatment effects on the growth parameters, the use of 40 g seed m-2 × 30-day old seedlings × 4 seedlings hill-1 could improve the growth performance of short duration transplanted Aus rice (cv. Parija). Therefore, a nursery seeding density of 40 g seed m-2 and 30-day old seedlings transplanting with 4 seedlings hill-1 appears as the promising combination in respect of growth performance of short duration transplanted Aus rice (cv. Parija).