Yield Response of Direct Seeded <i>Aus</i> Rice Varieties under Rainfed Condition

Abstract

Rainfed Aus rice is a popular conventional rice cultivation technique that through appropriate variety selection can accelerate the benefits of the farmer. On this context, an experiment was carried out at the research field of Bangabandhu Sheikh Mujibur Rahman Agricultural University, Gazipur1706 from April to August in 2014 to evaluate yield performance of some Aus rice varieties under rainfed condition. The experiment was laid out in a split plot design with three replications. The experiment consisted of two sets of treatments: water regime as irrigated (irrigation when necessary) and rainfed (dependent on rainfall) in the main plot and 15 varieties into sub-plots. It was revealed that yield and yield contributing characters were significantly influenced by water regime, variety and their interaction. The traits like number of effective tillers and non-effective tillers·hill , panicle length, test weight, grain yield and harvest index were higher in irrigated crops compared to rainfed. Considering the performance of yield, the highest grain yield recorded in BRRI dhan27 (irrigated-2.47 t·ha −1 and rainfed-2.26 t·ha ), BRRI dhan48 and BRRI dhan43 under both irrigated and rainfed treatment. BRRI dhan27 ranked the top under both irrigated and rainfed conditions, however the relative yield was maximum in BRRI dhan55 (reduction was only 3.59%) followed by Nerica10. Hence, considering the yield stability and absolute yield performance, BRRI dhan27 may be considered favorably cultivable for Aus season in Bangladesh followed by BRRI dhan55, BRRI dhan48 and BRRI dhan43.

Yield Performance of Binadhan-24 Over Two Selected Locations in Bangladesh

“…Mymensingh recorded the lowest maturity period (146 days) and the highest (153 days). Ghosh et al (2015) supports the idea that genotypic variations may contribute to differences in maturity.…”

Yield Performance of Two Drought Tolerant Rice Mutants in Boro Season at Two Semi Drought Prone Areas of Bangladesh

“…Lowest maturity period was recorded in Mymensingh (147 days) and Highest at Jamalpur (152 days). Maturity might differ due to genotypic differences which is supported by Ghosh et al [9], who has recorded variation of days to maturity due to different varieties and Haque et al [10] reported wide genotypic variation in phenological events among 14 Aus cultivars. The duration also may depend on cultural management, soil and climatic conditions (edaphic factors) which agrees with Ahmed et al [11].…”