YIELD AND YIELD COMPONENT OF T.AMAN RICE (Oryza sativa L.) CULTIVARS AS INFLUENCED BY SEEDLING AGE UNDER TIDAL NON-SALINE ECOSYSTEM

In this study of seedling age on the yield and yield component of T-Aman rice cultivars. A field experiment was carried out in the Agronomy Field Laboratory,  Patuakhali Science & Technology University, Patuakhali, Bangladesh under the Agro-ecological Zone 13(Ganges Tidal Floodplain) during the July to December 2011. Experimental design was arranged in Randomized Block design with three replications.  The primary factor of seedling age (30, 45, 60 days) and the secondary factor of rice cultivar (BRRI dhan44 & Local Lalmota) were considered. The hill mortality rate was higher in BRRI dhan44 than local Lalmota each seedling age. The utmost grain yield had been related to the 45 days seedling age among the seedling ages with 4.24 ton per hectare. Between the cultivars of the highest yield of the grain was produced in Local Lalmota cultivar with 4.56 ton per hectare. The excelled yield (4.69t/h) of the grain was produced under the counter effect of 2 factors for local Lalmota with 45days old seedlings.