スギおよびヒノキ林下の土壌における塩基の蓄積要因

概要

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The amount of nutrients in A_0 horizon and surface mineral layers were examined. The difference in the accumulation of nutrients, especially calcium, was apparent between sugi (Cryptomeria japonica D. Don) and hinoki (Chamaecyparis obtusa S. et Z.) stands. 1) The total calcium content in A_0 horizon was increased with the increase in the age of sugi stands especially in the leaf litter of L layer. But such a marked tendency wasn't observed in hinoki stands. 2) In the surface horizon beneath the sugi stands, the total amount of calcium has increased rapidly after 45 years old. A large portion of total calcium was in exchangeable form. 3)the calcium content of the fresh litter and the weight of A_0 horizon in the sugi stands were about two-fold of the hinoki stands ; consequently the total amount of calcium in soil profile under the sugi stands was approximately 3- to 4-fold of that of hinoki stands. 4) The nutrients in the soils of a 65-year-old sugi stand were compared with those of a same years old hinoki stand ; the accumulation of nitrogen, phosphorus and calcium in the sugi stand were evident, but not in the hinoki stand. This accumulation of calcium in soil was estimated to be approximated by equivalent to the total amounts of litter falls in about 30 years.
社団法人日本土壌肥料学会の論文
1993-06-05