Loss of organic matter, elements, and organic fractions in decomposing Eucalyptus microcarpa leaf litter

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Abstract
The losses of organic matter, elements and organic fractions during the decomposition of Eucalyptus microcarpa Maiden leaf litter were measured in litterbags. The concentrations of nitrogen and phosphorus in litter increased for most of the decomposition period. At the end of 15 months the amounts of elements lost were in the order K > Na > Mg > P > N >Ca. A simple method to determine the different organic fractions according to the degree of decomposability and using a small quantity of litter (0.1 – 0.5 g) was developed. The mass loss during the initial 3 months was most closely related to the amount of light organic fraction in the litter, while during the final 12 months the mass loss was most closely related to the harder organic fractions in the litter.