Soybean agronomic performance in response to foliar spraying of elemental sulfur
DOI:
https://doi.org/10.5965/22381171e27486Keywords:
Foliar fertilizer, Oil, Protein, Grain yieldAbstract
Among the sulfur sources employed in soybean fertilization, it is highlighted the elemental sulfur (ES) due to its high concentration. Its foliar uptake is reported in literature, however few are the studies carried out so far. The study had as goal to assess the biometric and grain yield performance of soybean in response to foliar spraying of ES in R1 and R5.2 growth stages. It was carried out a study in randomized block design with four repetitions, comprised of ten treatments resultant of a factorial scheme 2 x 5 (with or without ES spraying in R1 and 5 increasing doses of ES spraying in R5.2). It were assessed: chlorophyll index; final plant stand; stem diameter; first pod insertion height; plant height; contents of oil, protein and sulfur in the grain; number of pods by plant; number of grains by plant; mass of 100 grain; and grain yield. It was not observed effect of ES sprayed isolated in R1 and in R5.2 with increasing doses, neither of the associated application in both growth stages, over soybean biometric and grain yield performance, even the soil presenting low sulfur content in the 0-20 cm layer. Sampling the soil also in the 20-40 cm layer to assess the sulfur content is advised in future studies.
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