トラクタ集材が伐採跡地に及ぼす影響(II) : 傾斜地におけるトラクタ集材路の土壌条件とスギ植栽苗木の生長

概要

論文の詳細を見る
Soil conditions and the annual height-growth of planted sugi (Cryptomeria japonica D. DON) seedlings were investigated on bare tractor skid-roads in two hilly logging-areas (inadequate and adequate sites). 1) Soil conditions of bare skid-roads constructed by the removal of 0.3〜1.5 m of surface soil were very poor for the growth of planted seedlings compared with those on undisturbed cutover-areas ; soil of bare skid-roads doubled in hardness and had a 12〜13% loss in soil porosity and organic-matter content compared with the soil of undisturbed cutover-areas. 2) The effects of bad soil-conditions of bare skid-roads on planted seedlings appeared conspicuously on sites inadequate for sugi ; the rate of annual height-growth of sugi seedlings planted on bare skid-roads during the first growing season was 75% less on sites inadequate for sugi and 10% less on adequate sites compared with values for undisturbed areas.
日本森林学会の論文
1985-06-25