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|metadata.artigo.dc.title:||Phosphorus availability and soybean growth in contrasting oxisols in response to humic acid concentrations combined with phosphate sources|
|metadata.artigo.dc.creator:||Rosa, Sara Dantas|
Silva, Carlos Alberto
Maluf, Henrique José Guimarães Moreira
|metadata.artigo.dc.subject:||Low-grade phosphate rock|
|metadata.artigo.dc.publisher:||Taylor & Francis Online|
|metadata.artigo.dc.identifier.citation:||ROSA, S. D.; SILVA, C. A.; MALUF, H. J. G. M. Phosphorus availability and soybean growth in contrasting oxisols in response to humic acid concentrations combined with phosphate sources. Archives of Agronomy and Soil Science, [S.l.], v. 66, n. 2, 2020.|
|metadata.artigo.dc.description.abstract:||Humic acid (HA) use can improve phosphorus (P) availability in soils with high P fixation capacity. The aim of this study was to evaluate soil P availability and soybean growth in both medium-texture (MT) and clayey (CL) Oxisols under humic acid carbon (C-HA) concentrations: 0, 5, 10, 50 and 100 mg kg−1, combined with Araxá phosphate rock (APR) and single superphosphate (SS). Mixtures of C-HA with P sources were incubated for 15 d. In sequence, the soil solution was extracted and analyzed for soil solution C (SSC), soil solution P (SSP) and soil solution electrical conductivity (EC). Soil initial resin-P and pH were determined before soybean sowing and, after harvest, shoot (SDM), root (RDM), total dry matter (TDM), soil residual resin-P and soil pH were determined. In CL fertilized with SS, the addition of C-HA increased SSP by 17%, residual resin-P by 42%, SDM, P and N accumulated in the shoot. Addition of C-HA reduced SSP and initial resin-P in MT treated with SS and increased in 18% residual resin-P in MT fertilized with APR. Effects of HA on soil attributes, soybean growth and nutritional status rely on HA concentration, soil texture and P source used.|
|Appears in Collections:||DCS - Artigos publicados em periódicos|
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