지리산 국립공원 동부지 역에 위치한 중산리, 백무동, 대원사 산구야영장 등 4개의 야영장조성지와 인접한 산림지역의 토양 특성을 비교한 결과 토양용적밀도, 토양경도, 토양 pH, 투수율, 토양호흡율 등의 토양 특성은 산림지역과 야영장 조성지 사이에 차이가 있었다(p〈0.05). 그러나 표토(0~15cm)와 심토(15~30cm) 사이에 깊이별 토양특성은 야영장 조성지와 산림지역 모두 차이가 없었다(p〉0.05). 토양용적밀도의 경우 산림지역 0.95g/cm3, 야영장 조성지 1.29~1.44g/cm3로, 야영장 조성지가 산림지역에 비해 높았으며, 토양경도는 산림지역 1.44kg/cm2, 야영장 조성지 2.9~4.0kg/cm2로 유의적인 차이가 있었다(p〈0.05). 토양공극율의 경우 산림지역은 64.3%로 야영장 조성지 45.7~51.4%에 비해 높았고, 토양 PH는 산림지역 pH 5.46, 야영장 조성지 pH 5.49~pH 6.38 범위에 분포하였다. 투수율의 경우산림지역 18.7cc/초, 야영장 조성지 0.79~2.06cc/초, 토양호흡율은 산림지역 0.58gCO2/m2/h로, 야영장 조성지 0.13~0.34gCO2/m2/h에 비해 높게 나타났다.

This study was carried out to investigate the effect of no-tillage on sequential cropping supported from recycling of first crop ridge on the productivity of crop and physical properties of soil under green house condition. This study is a part of “No-tillage agriculture of Korea-type on recycled ridge”. From results for distribution of soil particle size with time process after tillage, soil particles were composed with granular structure in both tillage and no-tillage. No-tillage soil in distribution of above 2 mm soil particle increased at top soil and subsoil compared with tillage soil. Tillage and one year of no-tillage soil were not a significant difference at above 0.25 mm~below 0.5 mm, above 0.5 mm~below 1.0 mm, and above 1.0 mm of water-stable aggregate. Two years of no-tillage soil was significantly increased by 8.2%, 4.5%, and 1.7% at above 0.25 mm~below 0.5 mm, above 0.5 mm~below 1.0 mm, and above 1.0 mm of water-stable aggregate, respectively, compared with one year of no-tillage. Bulk density of top soil was 1.10 MG m3 at tillage and 1.30 MG m3 at one year of no-tillage. Bulk density of top soil was 1.14 MG m3 at two years and 1.03 MG m3 at three years of no-tillage, respectively. Bulk density of subsoil was a similar tendency. Solid phase ratio in top soil and subsoil was increased at one year of no-tillage compared with tillage soil, while soil phase ratio decreased at two and three years of no-tillage. Pore space ratio in tillage top soil (58.5%) was decreased by 8.5% at compared with no-tillage soil (51.0%). Pore space ratio was 56.9% and 61.2% at two and three years of no-tillage soil, respectively. Subsoil was a similar tendency. Gaseous phase ratio was decreased at one year of no-tillage soil, and increased at two and three years of no-tillage soil compared with tillage soil. Liquid phase ratio in top soil was increased at one year of no-tillage (28.3%), and decreased at two years (23.4%) and at three years (18.3 %) of no-tillage soil compared with tillage soil (24.2%). Subsoil was a similar tendency. Liquid phase ratio in subsoil was increased than top soil.