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Effects of Complete Deep-soil Cultivation on Initial Forest Stand Development

Göran ÖrlanderFredrik NordborgPer Gemmel

出版	Swedish University of Agricultural Sciences, Faculty of Forestry, 2002
ISBN	91576629409789157662941
URL	http://books.google.com.hk/books?id=PpdIAQAACAAJ&hl=&source=gbs_api

註釋Long-term effects of complete deep-soil cultivation on forest growth and yield were evaluated in an experiment initiated in 1988 on six different sites in Sweden. Complete deep-soil cultivation was compared with less intensive site preparation. Ten years after the start, growth, stand structure, damage, and survival were evaluated. Conifer seedling growth and survival on sandy sites, frost-prone sites or both, generally increased following deep-soil cultivation compared to patch scarification. Silty sites exposed to summer frost were also positively affected by deep-soil cultivation, although the risk of frost-heaving increased. For deciduous seedlings the result varied, but survival in birch was improved by deep-soil cultivation. On former farmland, deep cultivation may effectively control competing vegetation. Deep-soil cultivation in strips over half the area appeared to be as efficient as complete treatment. This has financial and environmental implications. Deep cultivation reduced variability in tree size, since it provided a more uniform environment during stand establishment. When long-term effects of complete deep-soil cultivation on forest growth and yield are evaluated, the significant differences in stand establishment demonstrated in the study must be considered. Future revisions of the experiment must address the question of the Iong-term effects of intensive soil cultivation on forest growth and yield.