산불피해지에 식재 조림된 소나무임분의 시비처리에 따른 소나무 묘목의 생장, 토양특성 및 하층식생 구조의 변화

Abstract

This study was to investigate the growth of planted red pine (Pinus densiflora S. et. Z.) sedling, soilproperties and understory vegetation structure after fertilizer treatments [unfertilized plot (control), CF plot(Combination Fertilizer), UF plot (Urea Formaldehyde Fertilizer)] in a Pinus densiflora stand planted after theforest fires in Gosung, Gangwon province. The height growth rates of seedlings in four years were 264% inunfertilized, 404% in CF, and 388% in UF plots, respectively. The rot colar diameters were increased 340%in unfertilized, 454% in CF, and 427% in UF plots, respectively. No significant changes occurred in soil totalnitrogen and potassium ion (K+) with the fertilization. However, available P2O5 content in the soil surface (0-15 cm) increased with the fertilizer aplication. Soil organic matter increased significantly with fertilizertreatments, while gradual decrease occurred in unfertilized plots. Sodium ion (Na+pH, CEC, calcium ion (Ca2+) and magnesium ion (Mg2+) contents were not significantly diferent amongtreatments. Although Shannon's species diversity index and species richness in understory vegetation did notchange with fertilizer treatments, vegetation cover rates in forest floor increased significantly with thefertilization. These results suggest that the increase of pine sedling growth and vegetation cover rates withfertilization could enhance soil stabilization in forest fire areas.