ISSN 2375-088X
African Journal of Soil Science ISSN 2375-088X Vol. 12 (3), pp. 001-006, March, 2024. Available online at www.internationalscholarsjournals.org © International Scholars Journals
Full Length Research Paper
Effects of phosphorus and potassium fertilization on soybean crop yield in oxisol environments
Leandro Rampim1*, Rubens Fey2, Maria do Carmo Lana1, Marcos Vinícius Mansano Sarto3, Jean Sérgio Rosset4, André Luiz Piva1, Éder Júnior Mezzalira1, Jessica Koppo1, Paulo Vitor Dal Molin1, Jeferson Klein5, Jolimar Antonio Schiavo6, Jaqueline Rocha Wobeto1, Adriano Mitio Inagaki1 and Thaísa Muriel Mioranza1
1State University of West Parana, Unioeste, CCA/PPGA, Pernambuco Street No. 1777, P.O. Box 9, Zip Code 85960-
000, city of Marechal Candido Rondon, Parana state, Brazil.
2Federal University of South Border - UFFS, city of Laranjeiras do Sul, Parana state, Brazil.
3State University Paulista Júlio de Mesquita Filho - UNESP, Lageado Farm, Alcides Soares Highway, Km 3, Zip Code
18610-300, city of Botucatu, São Paulo state, Brazil.
4Federal Institute of Education, Science and Technology of Parana, Civica Avenue, 475, Civic Center, Zip Code 85935-
000, city of Assis Chateaubriand, Parana state, Brazil.
5Professor, Pontifical Catholic University, PUC, city of Toledo, Parana state, Brazil.
6State University of Mato Grosso do Sul, city of Aquidauana, Mato Grosso do Sul state, Brazil.
Received 13 July, 2023; Accepted 16 September, 2023
Abstract
It is recommended to use phosphorus and potassium fertilization on soybean; however it has been common to verify the absence of effect on crop productivity, especially in no-tillage system. Thus, the study aimed to evaluate the effect of doses of superphosphate and potassium chloride in the leaf tissue nutrient content and yield of soybean growing in Oxisol. The experiment was installed in October 2011 in a randomized block design in split-bands with two factors (4x4), with four replications, totaling 64 plots, being Factor 1 with doses of superphosphate (0, 136, 331 and 700 kg ha-1) at sowing and Factor 2 with doses of potassium chloride (0, 160, 320 and 800 kg ha-1) released with cultivar Vmax RR (SYN 7059RR). In the experiment, the variables evaluated were Ca, Mg, K, P, S, Cu, Zn, Mn and Fe in leaf tissue and grain yield. The fertilization with superphosphate and potassium chloride do not interfere in leaf nutrient content and yield of soybean cultivar Vmax RR (SYN 7059RR) grown on an Oxisol of clayey with levels of P and K classified as high. In these cases, it is advisable to keep only the maintenance fertilization according to the values of P and K exported by grain.
Key words: Chemical fertilizer, tillage systems, organic mineral fertilizer, superphosphate, potassium chloride.