Fertilization, grain yield and profitability of the rotation between soybean and corn in soil with improved fertility

Authors

  • Julian Junio de Jesus Lacerda Universidade Federal de Lavras, Departamento de Ciência do Solo
  • Álvaro Vilela de Resende Embrapa Milho e Sorgo
  • Antonio Eduardo Furtini Neto Universidade Federal de Lavras, Departamento de Ciência do Solo
  • Clério Hickmann Universidade Federal de Lavras, Departamento de Ciência do Solo
  • Otávio Prates da Conceição Universidade Federal de São João Del Rei, Campus Sete Lagoas

DOI:

https://doi.org/10.1590/S1678-3921.pab2015.v50.20300

Keywords:

crop system fertilization, fertilizer saving, maximum economic efficiency, no tillage, efficient use of fertilizers

Abstract

The objective of this work was to evaluate the effects of fertilization on P and K levels in soil with improved fertility, and to identify N, P, and K doses needed to provide the greatest profitability in a rotation between soybean and corn in these soils. The experiment was carried out for three harvest seasons, in a farm with high technological investment, in a clayey Oxisol from Cerrado with high fertility. A randomized complete block design was used, in a split‑plot arrangement with three replicates. Treatments consisted of 0, 50, 100, and 150% of the recommended rates of NPK on sowing (plots), and of KCl (soybean) and N (corn) at topdressing. Even after three harvests, P (Mehlich‑1) contents remained unchanged in the soil without fertilization. Moreover, soybean yield did not decrease in the absence of fertilization. However, corn was more sensible to the reduction of fertilization, with the maximum economic return obtained with 312 kg ha-1 of the 10‑32‑10 fertilizer formulation, and of 263 kg ha-1 urea at topdressing. Soils with improved fertility demand adjustments of fertilization management for the efficient use of fertilizers in crops with high technological investment.

Author Biographies

Julian Junio de Jesus Lacerda, Universidade Federal de Lavras, Departamento de Ciência do Solo

Álvaro Vilela de Resende, Embrapa Milho e Sorgo

Antonio Eduardo Furtini Neto, Universidade Federal de Lavras, Departamento de Ciência do Solo

Clério Hickmann, Universidade Federal de Lavras, Departamento de Ciência do Solo

Otávio Prates da Conceição, Universidade Federal de São João Del Rei, Campus Sete Lagoas

Published

2015-10-09

How to Cite

Lacerda, J. J. de J., Resende, Álvaro V. de, Furtini Neto, A. E., Hickmann, C., & Conceição, O. P. da. (2015). Fertilization, grain yield and profitability of the rotation between soybean and corn in soil with improved fertility. Pesquisa Agropecuaria Brasileira, 50(9), 769–778. https://doi.org/10.1590/S1678-3921.pab2015.v50.20300

Issue

Section

FERTILIZATION