Four rice genotypes Binadhan-8, PBRC-37, NERICA-1 and NERICA-10 were evaluated under four levels of salinity, i.e., control, 6, 9 and 12 dSm-1 to understand their effects on flag leaf chlorophyll content and yield attributes of these... more
Four rice genotypes Binadhan-8, PBRC-37, NERICA-1 and NERICA-10 were evaluated under four levels of salinity, i.e., control, 6, 9 and 12 dSm-1 to understand their effects on flag leaf chlorophyll content and yield attributes of these genotypes. The experiment was established under polythene shade to avoid rain water in the pot yard of Crop Physiology Division, Bangladesh Institute of Nuclear Agriculture, Mymensingh. NERICA-1 produced the highest grain yield hill-1 due to higher number of panicle hill-1, panicle length and 1000 grain weight against salinity (average of 0, 6, 9 and 12 dSm-1) which was followed by PBRC-37. The interaction effect of different levels of salinity and genotypes on different parameters (effective tillers hill-1, filled grains hill-1 and grain wt. hill-1) decreased slowly from control to 9 dSm-1 and then after it decreased sharply at 12 dSm-1. NERICA-1 and PBRC-37 were relatively high yielding at 12 dSm-1 compared to other two genotypes. Flag leaf chlorophyll a, chlorophyll b and total chlorophyll content were high in NERICA-1 and NERICA-10 compared to Binadhan-8 and PBRC-37. NERICA-1 and NERICA-10 showed higher chlorophyll a, chlorophyll b and total chlorophyll than Binadhan-8 and PBRC-37 in all salinity levels showed their higher chlorophyll stability against salinity. Furthermore, NERICA-1 and PBRC-37 showed salt tolerance up to 9 dSm-1 where NERICA-1 and NERICA-10 showed higher chlorophyll stability than Binadhan-8 and PBRC-37 against salinity.
in order to evaluate drought tolerant rice genotypes under different nutrient levels in artificially created stress condition during reproductive stages. The field experiment was conducted in strip plot design with three replications.... more
in order to evaluate drought tolerant rice genotypes under different nutrient levels in artificially created stress condition during reproductive stages. The field experiment was conducted in strip plot design with three replications. Three main-plots contain three different levels of fertilizers, each consisting of 14 sub-plots of genotypes. The result revealed that the rice genotypes showed the significant differences for days to flowering, days to maturity and grain yield. Genotype IR83381-B-B-137-1 produced the-1-1 highest grain yield (3851 kg ha), followed by IR83383-B-B-141-2 (3130 kg ha). The differences was-1-1-1 significant for no. of tillers hill , no. of panicles hill and biomass yield kg ha. In terms of level of fertilizers; rice genotypes showed significant differences for days to maturity. Interaction effect was observed significant for days to maturity and no. of panicles. The correlation between tillers-1-1 number hill and panicle number hill was the highest (0.994**) and in path analysis for grain yield; direct effect of biomass yield was the highest (0.58134).
