コナラ林,クヌギ林伐採後の萌芽成長にともなう堆積有機物の重量と窒素量の変動

概要

論文の詳細を見る
Growth and biomass of a Konara and a Kunugi coppice forest were measured for 6 years after clear cutting. Rapid growth of sprout shoots was observed and leaf biomass recovered quickly the weight that was before cutting within 2 or 3 years. This means that leaf litter fall; organic matter and nutrients; increased rapidly after cutting if the forest regenerated by sprout shoots. The forest floor decreased rapidly for 3 years and the weight reduced to about 50% of be for cutting. The decrease almost stopped after 4 years because of increase of leaf litter fall. Decomposition rate of the forest floor was reduced for about 3 years after cutting but the rate increased gradually as the leaf biomass increased. Thinning of sprout shoots in early stage of regeneration may effectively supply organic matter to the forest floor which became minimum accumulation after cutting. Nitrogen content of the forest floor decreased more slowly than organic matter because the nitrogen concentration increased as the organic matter decomposed. Nitrogen content of sprout shoots was so low that nitrogen supply from the thinned sprout shoots could not be expected.
森林立地学会の論文
1991-12-30