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Cover plants and mineral nitrogen: effects on organic matter fractions in an oxisol under no-tillage in the cerrado 90
Santos,Isis Lima dos; Caixeta,Carla Ferreira; Sousa,Alex Antônio Torres Cortês de; Figueiredo,Cícero Célio de; Ramos,Maria Lucrécia Gerosa; Carvalho,Arminda Moreira de.
Cover plants are essential for the sustainability of no-tillage systems in tropical regions. However, information on the effects of these plants and N fertilization on soil organic matter fractions is still scarce. This study evaluated the effect of cover crops with different chemical composition and of N topdressing on the labile and humified organic matter fractions of an Oxisol of the Cerrado (savanna-like vegetation). The study in a randomized complete block design was arranged in split-plots with three replications. Four cover species were tested in the plots and the presence or absence of N topdressing in the subplot. The following cover species were planted in succession to corn for eight years: Urochloa ruziziensis; Canavalia brasiliensis M. ex...
Tipo: Info:eu-repo/semantics/other Palavras-chave: Organic carbon; Humic substances; Particulate organic carbon.
Ano: 2014 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832014000600022
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