Foliar application of copper restores early pod yield without improvements in nitrogen nutrition and vegetative growth of soybean under low-copper stress
| dc.citation.journaltitle | JOURNAL OF PLANT NUTRITION | |
| dc.creator | ZAMBROSI, F. C. B. | |
| dc.date.accessioned | 2026-05-05T17:56:57Z | |
| dc.date.issued | 2025 | |
| dc.description.resumo | Although foliar copper (Cu) spray is widely adopted to correct nutrient deficiency, detailed evaluation of the effectiveness of fertilizer sources for this goal remains crucial. The interactive effect between root Cu supply and foliar application, as soluble sulfate (CuS) or sparingly soluble microparticulate oxide (CuO), on nodulation traits, plant nutritional status and dry mass of vegetative and reproductive organs was assessed. Plants were fertigated until full pod phase with Cu deficiency (0.01?µmol L?1 Cu, CuDef) or sufficiency (1.0?µmol L?1 Cu, CuSuf). These conditions were combined with nutrient spray (0.5?g L?1 Cu) at V4 phase as CuS or CuO in addition to a control with deionized water. Cu deficiency reduced dry mass and number of nodules, which was reflected in decreased leaf N concentration. While CuDef markedly reduced dry mass (?88%) and number of pods (?86%), the effect size on shoot biomass was 4.0-fold less pronounced. Cu concentration in sprayed leaves increased similarly with both fertilizer sources, while the response in the unsprayed organs was higher with CuS. Cu spray was able to reverse the negative effects of Cu deficiency on pod yield. However, nodulation traits, plant N nutrition and vegetative growth were not improved. The sensitivity of soybean yield formation to low Cu mostly relates to impairments on pod set rather on plant growth and N acquisition. Implications for grain yield of CuDef-plants, related to the lack of synchrony between improved pod set with the recovery of shoot growth and N nutrition under Cu spray, warrants elucidation. | |
| dc.format.extent | 1-8 | |
| dc.format.issue | 48 | |
| dc.identifier.citation | Zambrosi, F. C. B. (2025). Foliar application of copper restores early pod yield without improvements in nitrogen nutrition and vegetative growth of soybean under low-copper stress. Journal of Plant Nutrition, 48(16), 2767–2774. https://doi.org/10.1080/01904167.2025.2498366 | |
| dc.identifier.doi | http://dx.doi.org/10.1080/01904167.2025.2498366 | |
| dc.identifier.uri | https://repositorio.iac.sp.gov.br/handle/iac/95 | |
| dc.subject | Fertilizer efficiency, Glycine max, micronutrient, nutritional stress, yield formation | |
| dc.title | Foliar application of copper restores early pod yield without improvements in nitrogen nutrition and vegetative growth of soybean under low-copper stress |