9-1-5 EFFECT OF SUBMERGENCE DURATIONS ON GROWTH PARAMETERS AND CHLOROPHYLL CONTENT OF HYBRID AND INBRED AMAN RICE



K.U. Ahamed, N. Akhter, M. Akter and M.M. Rahman

Corresponding authour’s Email: Mmr_abac@yahoo.com

Abstract

An experiment was conducted at the research farm of Sher-e-Bangla Agricultural University (SAU), Dhaka, Bangladesh to study the effect of submergence durations on growth parameters and chlorophyll content of some hybrid and inbred Aman rice. The experiment was laid out in factorial randomized complete block design. The treatments consisted of four submergence durations (S0 = Control or no submergence, S1 = Submergence for 6 days, S2 = Submergence for 10 days, S3 = Submergence for 14 days) and six Aman rice varieties (hybrids: BRRI Hybrid dhan3, ACI Shankar and Heera-2; inbreeds: BRRI dhan34, BRRI dhan46 and BRRI dhan51 with BRRI dhan46 as check). The experimental results showed that submergence durations and rice varieties differed significantly on different growth parameters and chlorophyll content. In all the varieties, the control treatment showed the highest plant height, number of tillers, root dry matter, stem dry matter, leaf dry matter, panicle dry matter, total dry matter and chlorophyll content which gradually decreased with increasing submergence duration from 6 days to 14 days. The greatest reduction in different growth parameters and chlorophyll content due to submergence for 14 days. The varieties BRRI dhan51 and BRRI dhan46 proved to be relatively submergence tolerant compare to others. On the contrary BRRI dhan34, ACI Shankar and Heera-2 were found to be susceptible to submergence.

Key words: Submergence, hybrid and inbred Aman rice, growth parameters and chlorophyll.

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