| Abstrakt: |
Purpose: Iron deficiency in soils worldwide affects the growth and development of edible crops, exacerbated in agricultural lands with little or no sustainable management. In the last decade, interest has been shown in using nanoparticles (NPs) as nanofertilizers or biostimulants to promote morphological and biochemical parameters in Fabaceae-family crops and various edible crops. Methods: The effect of Fe NPs (Fe2O3 and Fe3O4) as soil-applied biostimulants was investigated on growth parameters and mineral uptake in roots, stems, and leaves of escumite bean (Phaseolus acutifolious A. Gray). The concentrations used were 100, 200, 300, and 400 mg Fe NPs kg−1 dry soil and a control treatment (no Fe NPs). Results: The results showed that low concentrations of Fe NPs (100, 200, and 300 mg kg−1) as biostimulants improved plant growth, and fresh and dry biomass of stems and leaves. In contrast, high concentrations (400 mg kg−1) of Fe NPs decreased most of the parameters evaluated. Moreover, Fe NPs promoted the uptake of P, Ca, Mg, Fe, Mn, and Zn in roots. Conclusions: The application to the soil at low concentrations of Fe NPs (100, 200, and 300 mg kg−1) are effective in stimulating plant growth of beans and can be used to promote nutrient uptake from the soil to the roots and leaves. Although it is the first work that is tested in escumite bean plants, it is necessary to continue with the research work, specifically in the field, to evaluate physicochemical parameters, yield, and quality of the grain. [ABSTRACT FROM AUTHOR] |
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