EFFECT OF PRE-PLANTINC3 HARDENING OF SEEDLING ON THE PERFORMANCE OF INBREED AND HYBRID AMAN RICE

Abstract

l'hc experiment was conducted with a view to investigate the pre-planting hardening of seedling on the performance of inbreed and hybrid aman rice at Sher-e-Bangla Agricultural University. Dhaka-1207. Bangladesh during aman season (July to December. 2013). The experiment was carried out with three varictics i.e. BRRI dhan53. BRRI hybriddhan4, and Pajam and five seedling hardening treatment methods viz, direct transplanting (Tt), storage in shade condition for three days (T 2 ), storage in open field condition for three days (1)). storage in water condition for three days (F4 ) and storage in cool air condition for 24 hours (T5 ). This experiment was laid out in a randomized complete block design (factorial) with three rcpli cations. Results revealed that in open field condition. Pajam variety was significantly increased in plant height. number of effective tillers, leaf area index (LAI) and total dry matter (1DM) at 30DAT and 45DAT, respectively but later on BRRI hybriddhan4 showed the highest result. Yield attributing parameters, such as panicle length. grain number panicle* 1000 grain weight and yield were improved due to the treatments. The highest grain yield (7.26 t ha") was in BRRI hyhriddhan4 under open field storage condition. however. the lowest grain yield (2.31 1 had ) was found in BRRI dhan53 with direct transplanting combination