コジイ林葉群中の灰分およびカルシウムの季節変化と年間遠元量 : スダシイ群団の生態的特性について

概要

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Among the components studied in the present work, Shiia cuspidata and Cyclobalanopsis gilva, one subtree, Camellia japunica, and one shrub, Aucuba japonica were measured monthly for their water, ash, calcium contents of the leaves and the fallen leaves in fixed plots from Dec. 1962 to Nov. 1963. 1) The lower a tree or a shrub is in height in a forest, the higher the water content of the Ieaf is. (Fig. 1) 2) The foliage is renewed every year after the juvenilation, and the annual amount of fallen leaves attained 4.55tons/ha in dry weight (Table 1). 3) The foliage is renewed every year. The yearly curve of the ash and calcium contents in the leaves show two minima in winter and in summer. (Fig. 2) 4) The ash and calcium contents are higher for the subtree and the shrub than for the dominants. 5) For an area of one hectar, nearly 300kg of ash containing 100kg of calcium are estimated to be returned from the foliage to the ground each year.
日本生態学会の論文
1965-02-01