りんご紋羽病の発生と土壌状態との関係について(第1報)

概要

論文の詳細を見る
The authors surveyed the apple orchards on hillsides in Aomori Prefecture, for the purpose to research the relationship between the occurrences of apple trees and their soil conditions, under such assumption that this root-rot disease may be induced by failing of tree vigour. From the results obtained, it became apparent that the occurrences of this disease were closely related to their soil conditions, and especially that the effective depth of soil profile was a limiting factor for the maintenance of tree vigour. Within the area of this survey the results are summarized as follows : (1) Areas of the most abundant occurrences and the severest injuries of this disease are in regions of volcanogenous soil. But the disease occurs moderately even in shale-weathered soil where its surface soil is eroded. (2) Volcanogenous soil is rich in N/2 acetic acid soluble aluminum in any case and markedly so in the subsoil. (3) Though the effective depth of ordinary soil is decided principally by the physical properties, but in volcanogenous soil the large amounts of easily soluble aluminum in the subsoil is a more important factor for the determination of the effective soil depth, and this is probably the greatest important factor in the most abundant occurrences of Mompadisease in these regions.
社団法人日本土壌肥料学会の論文
1955-12-05