Effects of Iron on the Productivity of Lowland Rice (O. sativa L.) in Segregating Populations

Abstract

Rice plants have the tendency of taking up iron in the form of Fe 2+ , which is prevalent in paddy fields under flooded environments. But its deficiency or in excess of Fe 2+ in the soil affect several physiological functions of the plant. The objective of the study was to evaluates the effect of three ferrous sulphate concentration levels on the yield and yield components of lowland segregating rice populations. Three experiments were established in screenhouse concurrently in randomized complete block design in three replications in pots. Treatment comprised of 6 breeding lines each from two rice populations of F2 and F3 generations and two popular checks. Experiment one is the control without FeSO 4 treatment, while experiment two and three are F2 and F3 populations, respectively treated with FeSO 4 solution. Three concentration levels of FeSO 4 solution (600mg/kg of soil, 1200mg/kg of soil, and 1800mg/kg of soil,) were applied into each pots a week before transplanting in the treated experiments. Remarkable reduction in effective tiller number at 1800mg of Fe stress relative to the control was observed of 42.6% and 42.9% in F2 and F3 population, respectively. Significant reduction in grain yield of 33.5% and 36.4% at 1800mg of Fe compared to the control in F2 and F3 populations, respectively. The study showed that at 1200mg of Fe could be optimal for rice crop performance and at 1800mg of Fe becomes toxic to the plant as observed significant reduction in all agronomic traits especially in total grain yield. In F2 and F3 population, UPN 59, UPIA 2 and UPN 95 where the most stable genotypes across iron concentration levels. These genotypes could be used in population development for iron breeding programme.

Correlation Coefficient and Path Analyses of Yield and Yield Related Traits of Korean Double Haploid Rice for Germplasm Improvement in Nigeria

“…Effective tiller is the harvested tillers at maturity of the rice crop, the higher the number the higher the total grain yield. The high positive correlation of grain yield and effective tillers indicates an effective index in increasing the total grain yield and genotypes exhibiting this trait are potential for germplasm improvement similar reports on copper and iron compounds on rice [19,20]. Panicle weight showed positive and significant correlation with number of grains per panicle similar results were reported [21,22].…”

Alkaline and acidic soil constraints on iron accumulation by Rice cultivars in relation to several physio-biochemical parameters

“…FeSO 4 serves as a source of soluble iron ions (Fe 2+ ) that are readily available for uptake by plant roots. As the concentration of FeSO 4 increases, there is a higher concentration gradient of Fe 2+ in the soil, which enhances the potential for iron uptake by plant roots, leading to a higher accumulation of iron in the plant tissues [ 12 , 49 ].…”

Control of iron stress in water-saturated tidal land using ameliorant and its impact on rice productivity

“…The ameliorant role of rice husk ash, coconut husk ash, empty bunch oil palm compost, and goat manure has a more complex bond so that it can provide nutrients for plants when filling rice seeds (Ghulamahdi et al, 2023) (Figure 6). The total number of grains per panicle has a positive correlation with the number of productive tillers (Andrew et al, 2020) and grain weight (Fatimaturrohmah et al, 2016) so that a large number of total grain will be in line with the increase in grain yield. Plants that lack element N will result in grain being empty (Arinta & Lubis., 2018).…”