Effect of coating phosphorus with humic acids and micronutrients on yield of soybean and maize in succession

• DOI: 10.1016/j.jafr.2024.101318
• Publication Date: 2024-07-24T20:44:44Z
• Authors: M.O.T. de Ávila; S.G. Moreira; F.R.D. Lima; G.V. Pimentel; J.R. Macedo; M.R. Nunes; L.B.W. Gomes; E.G. Morais
• Keywords: Growing season

The increasing the efficiency of phosphate and micronutrient fertilization in tropical soils should be better studied to close crop yield gaps. aim this study was evaluate effect a soluble P source with or without humic acids (HA) micronutrients (M) on P-availability maize soybean Minas Gerais State, Brazil. crops were grown under rainfed no-till cropping system, 2016/2017 rainy summer season, wheat as cover 2017 winter 2017/2018 year. field trial organized 4 × 2 factorial arrangement [4 sources combination forms M supply]. coated monoammonium (MAP) supplied three ways: 1) MAP, 2) MAP + HA, 3) HA (B, Cu, Mn, Zn), plus control for (no P). supply Mn Zn Cu B (MZCB) MZCB supply). Coating increased soil availability but did not increase content within leaves. multivariate approach also showed that can response coating HA. content. However, diminished when included same granule (MAP M). raised leaves equally compared P. Soybean unaffected by source, likely due adequate leaf concentrations across all treatments. generally supply. For maize, yields supplying source. Conversely, typically decreased supply, except using granule.