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1 (Bulletin of FFPRI), Vol.6, No.2 (No.403), , June ) * The necessity for the research on the relationship between transition of forest floor vegetation accompanying thinning and function of soil and water conservation in artificial sugi(cryptomeria japonica) forest. OOHARA Hideki 1) * Abstract Presently, on the one hand the interest in public benefit such as soil and water conservation brought by forest is swelling, on the other the unsoundness of forest poses a social problem with rapid increase of the belated thinning forest. However, generally it is fact that the importance of a sound forest is not fully understood, also the consensus for promoting thinning is not obtained. In order to cope with this problem, it was necessary to verify the function of soil and water conservation being caused by thinning. Hereupon, I explained that the social background of the belated thinning forest being increase rapidly, and I tried to attach contemporary meaning to thinning management from the view of vegetation control. And I inspected the advancing situation of research and future directivity on this field, while I estimated the quantity of the report. As a result, although sugi (Cryptomeria japonica) artificial forest covers the Japanese land most widely, there are too few reports of this field. For that reason, it is conjectured that the research about the relation between soil and water conservation and thinning of sugi forest, floor vegetation will be needed most. Key words : thinning, soil and water conservation, vegetation, sugi (Cryptomeria japonica), artificial forest, belated thinninge, , Received Dec. 10, Accepted Jan. 25, 2007 * Tohoku Research Center, Forestry and Forest Products Research Institute Nabeyashiki, Shimo-Kuriyagawa Morioka, Iwate Japan ; ooharah@ffpri.affrc.go.jp 1) Tohoku Research Center, Forestry and Forest Products Research Institute(FFPRI)

2 128 OOHARA H. 2003,2006;,2006 5, , ha 682 ha 10,1996, ,2005;,2002,2006,2006,1972,2006;,2006,,2006, ha, /3, ,1994;,2005,1995;,1994,1992,2002,2005;,2005,2003; 2002;,2003,2006,2001;,2006;,1993;,2003;,2006;,1999 Fig. 1. A point of view for the promotion of thinning 6 2, 2007

3 The necessity for the research on the relationship between transition of forest floor vegetation accompanying thinning and function of soil and water conservation in artificial sugi(cryptomeria japonica) forest. 129,2001 Fig. 1,2005,2002 NPO Fig. 1,1954;,1992;,1973;,1987,1964;,1971;, Goldoftas,2006;Göltenboth,Hutter,2002;O Neil,Conde,200 6;Wurfel, , ha, Miura et al., FOLIS 1 FOLIS ,294 8,255 2,694 12,267 Table 1 15 FOLIS Bulletin of FFPRI, Vol.6, No.2, 2007

4 130 OOHARA H. Table 1. (FOLIS ) Nomber of literature in relation to thinning, soil and water conservation, vegetation and sugi(cryptomeria japonica) 4,294 8,255 2,694 12, FOLIS Japanese Forestry Literature Information System FOLIS Table 2. (CAB Abstracts ) Nomber of english literature in relation to thinning, soil and water conservation, vegetation and sugi(cryptomeria japonica) 7,349 92,298 53,751 1, , CAB AbstractsOvid web gateway thinning landslide, landslip, water runoff, soil runoff, sediment, source of water, water quality, erosion, flood, water flow, water conservation, land conservation, forest conservation, water holding, soil loss, surface soil, hydrology vegetation sugi, Cryptomeria japonica, Japanese cedar Fig. 2 CAB abstracts thinning 7349 landslide, landslip, water runoff, soil runoff, sediment, source of water, water quality, erosion, flood, water flow, water conservation, land conservation, forest conservation, water holding, soil loss, surface soil, hydrology vegetation 53,751 sugi, Cryptomeria japonica, Japanese ceder 1,252 Table , ,1977 1/2,1983;,1983 1/10 Miura et al.,2003 FOLIS 5, A0 6 2, 2007

5 The necessity for the research on the relationship between transition of forest floor vegetation accompanying thinning and function of soil and water conservation in artificial sugi(cryptomeria japonica) forest. 131,1978;,1990;,1989,1985;,1989; 2004;,2004 FOLIS 8 6 4,2001;,2002;,2001; , FOLIS 2003 Fig. 2. The proportion of reports in relation to thinning, soil and water conservation, vegetation and sugi(cryptomeria japonica) Bulletin of FFPRI, Vol.6, No.2, 2007

6 132 OOHARA H. 2m,1986;,1989,1990,2003; 1989;,2004;, ,,56, ,419, ,,79,,80p ,33p. 2005,44, ,2020, ,(, 460p.), I,,30, , Goldoftas,B 2006 When a tree falls in the Philippines, International Herald Tribune, March 7,2006 Göltenboth,F.,Hutter,C.(2002)Model project for sustainable rural development and biodiviersity rehabilitation in South East Asia, Rainforestation Farming, ,89, , 19, ,, 62P. 1989,26, , 2, 9p. 2006,1p ,,566, ) A 100, ,,95, , , 2007

7 The necessity for the research on the relationship between transition of forest floor vegetation accompanying thinning and function of soil and water conservation in artificial sugi(cryptomeria japonica) forest ,, , 37, ,,361p. 1981,,313, ,, , 8 5(3), ,13p. 2001,,41, ,34, ,,51,,72p. 2002,113, ,,54p. 2006,,1p. Miura,S.,Yoshinaga,S.,Yamada,T.(2003) Protective effect of floor cover against soil erosion on steep slopes forested with Chamaecyparis obtusa(hinoki) and other species J.For.Res.,8, ,H ,13p ,, 385p. 2006, 17,116p ,,,274, ,,12, , 2,3 4 O Neil,J.,Conde,H.(2006) Hundreds feared dead as mud Buries Philippines village, International Herald Tribune, February 17, ,160p. 1992,,344, ,,345, ,,228p. 2005,,222p p. 1989,,71, ,,2003, ,83, ,,204p., ,1p. 1998,673, ,, No.5,, ,,130p. 1971,,216p. 1991,,,,193p., , 265, Bulletin of FFPRI, Vol.6, No.2, 2007

8 134 OOHARA H., 36, ,,,199p. 2004,,46, ,,,348p. 2006, ( ),,47, ,,,230p ,,5, Wurfel,D 2004 Civil Society and Democratization in Philippines,(Growth Governance in Asia, Asia Pacific Center for Security Studies 237p.), ,, 535p., ,,54, ,,44, , ,,,94, , 2007

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