| Study on effect of environment on four rice planting durations (January, April, July and October) and four rice varieties (PTT1, PSL2, RD31 and RD41) was conducted at Ratchaburi Rice Research Center in 2011. The experimental design was split plot in RCB with three replications. Varietal characteristics, yield, yield component and meteorological data were recorded. PTT1 variety showed the longest maturity (128 days). Rice planting in April showed higher yield (808 kg/rai) than that planting in other durations. In addition, planting in April also showed the highest panicle length, number of filled seeds/panicle and 1,000 seed weight. The longest harvesting period (123 days) and lowest yield (510 kg/rai) was found in October planting. This could be... |
