Soil nitrogen absorption by corn as affected by crop residues addition

Authors

  • Ronaldo Demétrio
  • José G. Marinho Guerra
  • Gabriel de Araújo Santos
  • Dejair Lopes de Almeida
  • Helvécio de-Polli
  • Flávio A. de Oliveira Camargo

DOI:

https://doi.org/10.1590/S1678-3921.pab1998.v33.4866

Keywords:

green manure, carbon, fulvic acid, humic acid, humin, podsoil

Abstract

Various levels of Canavalia brasiliensis and Panicum maximum (20, 40 and 60 t.ha-1) were incorporated into a red-yellow podzolic soil, which was planted with corn. After 102 days in the greenhouse, the C, N, and organic matter fractions content of the soil and the N level dry matter of the plants were measured. One ton of Canavalia brasiliensis or Panicum maximum produced a linear increase of 0.088 or 0.068 mg C.g-1 soil, respectively. The C content of the alkali-soluble soil fraction of the humic fraction was unaltered, but was increased in the humin and free organic material fractions, especially by Canavalia brasiliensis. Nitrogen content increased linearly with the application of one ton of Canavalia brasiliensis or Panicum maximum to 0.0103 or 0.004 mg N.g-1 soil, respectively. There was a rise in the free fulvic acid fraction in soil treated with 40 and 60 t.ha-1 of Canavalia brasiliensis, compared with the control. Canavalia brasiliensis increased the N content of the soil and enhanced the N content of the corn to a level equivalent to that obtained with the application of 560 kg.ha-1 of N.

Published

1998-04-01

How to Cite

Demétrio, R., G. Marinho Guerra, J., de Araújo Santos, G., Lopes de Almeida, D., de-Polli, H., & A. de Oliveira Camargo, F. (1998). Soil nitrogen absorption by corn as affected by crop residues addition. Pesquisa Agropecuaria Brasileira, 33(4), 481–486. https://doi.org/10.1590/S1678-3921.pab1998.v33.4866

Issue

Section

SOIL SCIENCE