HUMIFIED FRACTION OF ORGANIC MATTER DUE TO PLANT MIXTURE CULTIVATION

Authors

  • Tony Jarbas Ferreira Cunha Empresa Brasileira de Pesquisa Agropecuária, Petrolina, PE
  • Vanderlise Giongo Empresa Brasileira de Pesquisa Agropecuária, Petrolina, PE
  • Alessandra Monteiro Salviano Empresa Brasileira de Pesquisa Agropecuária, Petrolina, PE
  • Flávio Adriano Marques Empresa Brasileira de Pesquisa Agropecuária, Recife, PE
  • Luciano Pasqualotto Canellas Biological Inputs to Agriculture Development Center, Universidade Estadual do Norte Fluminense Darcy Ribeiro, Campos dos Goytacazes, RJ

DOI:

https://doi.org/10.1590/1983-21252016v29n307rc

Keywords:

Humic substances. Infrared spectroscopy. Mangifera indica. Soil quality. Soil management.

Abstract

The aim of this study was to assess the organic matter changes in quantity and quality, particularly of the humic fraction in the surface layer (0–20 cm), of a Typic Plinthustalf soil under different management of plant mixtures used as green manure for mango (Mangifera indica L.) crops. The plant mixtures, which were seeded between rows of mango trees, were formed by two groups of leguminous and non-leguminous plants. Prior to sowing, seeds were combined in different proportions and compositions constituting the following treatments: 100% non-leguminous species (NL); 100% leguminous species (L); 75% L and 25% NL; 50% L and 50% NL; 25% L and 75% NL; and 100% spontaneous vegetation, considered a control. The plant mixtures that grew between rows of mango trees caused changes in the chemical composition of the soil organic matter, especially for the treatments 50% L and 50% NL and 25% L and 75% NL, which increased the content of humic substances in the soil organic matter. However, the treatment 25% L and 75% NL was best at minimising loss of total organic carbon from the soil. The humic acids studied have mostly aliphatic characteristics, showing large amounts of carboxylic and nitrogen groups and indicating that most of the organic carbon was formed by humic substances, with fulvic acid dominating among the alkali soluble fractions.

Author Biographies

  • Tony Jarbas Ferreira Cunha, Empresa Brasileira de Pesquisa Agropecuária, Petrolina, PE
    PESQUISADOR DA EMBRAPA SEMIÁRIDO ÁREA PEDOLOGIA E MATÉRIA ORGÂNICA
  • Vanderlise Giongo, Empresa Brasileira de Pesquisa Agropecuária, Petrolina, PE
    PESQUISADORA DA EMBRAPA SEMIÁRIDO ÁREA MANEJO E CONSERVAÇÃO DO SOLO LINHAS DE PESQUISA: - TECNOLOGIAS PARA UMA AGRICULTURA DE BAIXA EMISSÃO DE CARBONO - ESTOQUE E DINÂMICA DE CARBONO E NITROGÊNIO NO SEMIÁRIDO
  • Alessandra Monteiro Salviano, Empresa Brasileira de Pesquisa Agropecuária, Petrolina, PE
    Pesquisadora da Embrapa Semiárido Fertilidade do Solo e Nutrição de Plantas
  • Luciano Pasqualotto Canellas, Biological Inputs to Agriculture Development Center, Universidade Estadual do Norte Fluminense Darcy Ribeiro, Campos dos Goytacazes, RJ
    Professor associado da Universidade Estadual do Norte Fluminense Darcy Ribeiro e pesquisador do Núcleo de Desenvolvimento de Insumos Biológicos para a Agricultura

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Published

20-07-2016

Issue

Section

Agronomy