Mineralization of nitrogen from decomposing leaves of multipurpose trees as affected by their chemical composition

  • Mafongoya P
  • Nair P
  • Dzowela B
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Nitrogen release patterns from seven leguminous trees were determined from 8-week laboratory incubations. The quantities of extractable NH4+-N and NO3- released to the soil to which the leaves had been applied was determined at weekly intervals and was related to the initial N, polyphenol, and lignin concentration of the leaves. Cumulative N mineralized was not correlated to initial N, soluble polyphenol and insoluble tannin concentrations, but was correlated to lignin and neutral detergent fibre N (NDF-N) concentrations. The ratios of NDF-N:N (r=0.68 at P

Author-supplied keywords

  • Lignin
  • Nitrogen release
  • Polyphenols
  • Protein-binding capacity
  • Pruning

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  • P. L. Mafongoya

  • P. K.R. Nair

  • B. H. Dzowela

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