ドイ リョウイチ
  土居 良一   社会学部 社会学科   教授
■ 標題
  Doi & Ranamukhaarachchi 2007. Integrative evaluation of rehabilitative effects of Acacia auriculiformis on degraded soil
■ 概要
  Multivariate soil profiling was applied to determine the rehabilitative effects of 17- and 18-year-old Acacia auriculiformis plantation plots on a degraded land in Thailand. Soils were sampled from the A. auriculiformis plantation plots, a dry evergreen forest (the original vegetative type) and bare ground (the most degraded vegetation) in Sakaerat, Thailand. The soils were profiled by (1) physico-chemical measurements; (2) antibiotic disc diffusion method for soil bacterial community; and (3) long bean growth measurements. Soil dehydrogenase activity, as a soil microbial activity indicator, was also measured. No variables showed differences between soils of the dry evergreen forest and the plantation. Most of the physico-chemical and long bean variables showed clear differences between the bare ground
soil and soils of the dry evergreen forest and the A. auriculiformis plantation. The bacterial variables showed
less distinctive differences between the soils profiled. The land degradation was explained in terms of
deteriorated soil physico-chemical conditions and crippled biotic functions. The principal components
and discriminant analyses of the data sets for the methods and for all the variables indicated that the A.
auriculiformis
plantation soil had been restoring its original soil conditions, including abiotic properties
and biotic functions. For rehabilitating degraded lands in the Thai savanna region, it would be practical
and effective to plant A. auriculiformis.

  Doi, R. and Ranamukhaarachchi, S. L.
  共著   J. Trop. For. Sci.   19(3),pp.150-163   2007


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