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Annals of Botany 23: 229-239, 1959
© 1959 Annals of Botany Company

RESEARCH-ARTICLE

The Circulation of Minerals in Plantations of Pinus sylvestris L.

J. D. OVINGTON1

The Nature Conservancy Merlewood, Grange-over-Sands

The dry weights and amounts of sodium, potassium, calcium, magnesium, phosphorus, and nitrogen in the ground flora and organic layers formed over the mineral soil are recorded for an age series of plantations of Pinus sylvestris. From these data, the distribution of mineral nutrients within the plantations is deter-mined and calculations are made of the annual circulation of nutrients through the ecosystem. After 55 years of afforestation the amount of organic matter accumulated over the forest floor is only equivalent to the litter fall of the last 6 years. Thus, although afforestation results in a progressive accumulation of organic matter, the woodland community is characterized by a large and rapid transfer of nutrients between the plants and mineral soil.


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