EFFECT OF SUBMERGENCE AT SEEDLING STAGE ON MORPHOLOGICAL AND YIELD ATTRIBUTES OF RICE VARIETIES

Abstract

An experiment was conducted during June 10 December. 2013 10 observe the effect of submergence at seedling stage on some of the morphological attributes and yield of some T. aman rice (Orv~a saliva L.) varieties. Four submergence duration. viz .. control (no submergence). six days submergence. ten days submergence and fourteen days submergence and six varieties, viz., BRRI dhanSI, BRR! dhan46, BRR! dhan34. BRR! hybrid dhanl, BRRI hybrid dhan2, ACI hybridl were used for this experiment. The experiment was laid OUI in split plot design with three replications. All parameters were significantly affected by the submergence duration and variety. The highest (8.S0 t ha") grain yield was found from the combination of no submergence with BRRI hybrid dhanl and the lowest (1.20 t ha') from the combination of fourteen days submergence with BRRI dhan34. BRR! dhanSI followed by BRRI hybrid dhan I showed higher submergence tolerance and thus proved as tolerant varieties. On the other hand, BRRI dh,m34 and ACI hybrid I were susceptible to submergence.