Long-term effect of site preparation on soil quality in Tuntsa, Finnish Lapland

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• 作者：Paavo N&#228 ; rhi^a ; ^{paavo.narhi@gtk.fi} ; Nils Gustavsson^b ; Marja-Liisa Sutinen^c ; ^{marja-liisa.sutinen@metla.fi} ; Kari Mikkola^c ; ^{kari.mikkola@metla.fi} ; Raimo Sutinen^a ; ^{raimo.sutinen@gtk.fi}
• 关键词：Ca ; Al ratio ; Calcium ; Magnesium ; Mechanical site preparation ; Norway spruce
• 刊名：Geoderma
• 出版年：2013
• 出版时间：January, 2013
• 年：2013
• 卷：192
• 期：Complete
• 页码：1-6
• 全文大小：458 K

文摘

Long-term effects of mechanical site preparation on soil chemical properties of Norway spruce (Picea abies) clearcut areas have remained unclear. In 1960 a forest fire burned a Norway spruce forest in Finnish Lapland and the remaining trees were harvested. Subsequent mechanical preparation with disk trenching created continuous cross-contour disturbance tracks. We measured soil dielectric permittivity as dependent on water content, electrical conductivity, temperature, pH, as well as ammonium acetate extractable concentrations of mineral soil elements in a clearcut area. After forty-six years the loss of soil nutrients was considerably high, particularly with exchangeable Ca (? 40 % ) and Mg (? 51 % ), Ca:Al ratio (? 57 % ), and soil electrical conductivity (? 53 % ). The disk trenching had no considerable long-term effect on soil water content. The results indicate that intensive mechanical site preparation is a risk for long-term soil fertility and forest productivity in boreal conifer stands.