GROWTH PATTERN OF INBRED AND HYBRID RICE AS INFLUENCED BY CULTIVATION METHODS

Abstract

A field experiment was conducted at Agronomy field, Sher-e-Bangia Agricultural University, Dhaka during the period from December 2005 to May 2006 to study the influence of cultivation methods on the growth pattern of inbred and hybrid rice in Boro season. The experiment consisted of two level of treatments viz. variety (!3RRI dhan 29 and onarbangla-I) and cultivation method (PI, P" Pi, P., and P,) and was laid out in a split-plot design with four replications. Growth attributes like plant height, leaf area index and dry matter production of Horo rice at different growth stages and days to flowering and maturity were measured and recorded. The inbred variety under System of Rice Intensification (SRI) showed the large t plant but the nursery seedlings of the same variety resulted the highest dry matter production m: 1. The hybrid variety under SRI gave the lowest dry matter, Clonal tillers needed the longest duration and sprouted seeds required the shortest duration to flower and maturity.