PRODUCTION AND COMPOSITION OF SOYBEAN SEED ENRICHED WITH COBALT, MOLYBDENUM, AND NICKEL
DOI:
https://doi.org/10.32404/rean.v13i1.9719Keywords:
Fatty acids, Glycine max (L.) Merrill, Oil and protein, Seed enrichment, Seed yieldAbstract
Cobalt (Co) and molybdenum (Mo) are essential for biological nitrogen fixation (BNF) in soybean and may be supplied through enriched seed. Nickel (Ni) is also essential to BNF; however, there are no reports of its use in association with Co and Mo for seed enrichment. This study aimed to assess whether soybean seeds can be enriched with Co, Mo, and Ni through foliar application to the parent plant, and to evaluate the effects of this application on both the parent plant and the resulting seeds. A study was carried out in a fully randomized design, with seven foliar-applied treatments at the R5.2 growth stage: control; CoMo at a fixed rate (FR) (40/400 g ha-1 Co/Mo); CoMo in FR + 20 g ha-1 Ni; CoMo in FR + 40 g ha-1 Ni; CoMo in FR + 60 g ha-1 Ni; CoMo in FR + 80 g ha-1 Ni; CoMo in FR + 100 g ha-1 Ni. The following variables were assessed: chlorophyll index, biometric and yield performance of the parent plant, and contents of chemical elements, oil, protein, and fatty acids in the seed. The results obtained in this study suggest that applying Co (40 g ha-¹), Mo (400 g ha-¹), and Ni (up to 100 g ha-¹) in a single application at the R5.2 growth stage tends to enrich the seeds produced with these three elements, without harming the growth and development of the parent plant. Seed enrichment altered the contents of other chemical elements in the seeds produced; however, it did not affect the oil, protein, or fatty acid contents.
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