砂丘地の土壌-植生系に及ぼす海岸林の効果に関する研究 : アソシエーション分析による比較

概要

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The vegetation of a coastal sand dune of the Kaetsu District, Niigata Prefecture was studied with the association-analysis of WILLIAMS and LAMBERT. Six types of associations were recognized, and their relationships with edaphic environments were analyzed. Association I, characterized by Ischaemum anthephoroides MIQ. and Carex kobomugi OHWI was situated on a semi-fixed dune, and its immature surface soil had high pH and bulk density and low carbon (C) and nitrogen (N) contents and cation exchange capacity (CEC). Association II, defined by the presence of Imperata cylindrica BEAUV. var. koenigii DUR. et SCHINZ and Elymus mollis TRIN., occurred on the inland dunes with comparatively high C and N contents. Among the coastal dune forests, the Robinia type (III), the Pinus-Paederia type (IV), the Pinus-moss type (VI), and the Pinus type lacking in moss (V) were classified. The surface soil habitats belonging to the Robinia type (III) were characterized by high organic matter and low bulk density and had the most excellent soil chemical and physical properties. The Pinus-Paederia type (IV) is second to Association III in soil characteristics. The soils of Associations V and VI, found in the inland closed-pine forest, are considerably inferior to those of Associations III and IV. The soil of the Pinus-moss type (VI) had a remarkably low water-permeability and high soil-hardness.
日本森林学会の論文
1984-09-25