Analysis of changes of soil vertical zonaliy and dynamics of soil organic carbon with global warming

我们调查了北海道Rishiri岛的Sasa kurilensis草原、冷杉森林和虔诚的Pumila灌木丛下的火山灰土壤。研究了气候和植被对土壤剖面特征和土壤化学性质的影响。黑土(安多土)分布在萨萨草原下缓坡地的冲积扇上。在短叶松灌丛下，在山上缓坡上观察到土壤化。里希里。在山顶的缓坡上。Rishiri、高山红壤分布较广，土壤pH值随海拔升高而降低。这说明在高海拔立地条件下，土壤有机碳分解较少。里希里。底层土壤ALP与全碳的相关性高于表层土壤。这说明土壤有机碳不与铝或铁形成络合物。

We investigated volcanic ash soils under the Sasa kurilensis grasslands, Abies sachaliuensis forests and Pious pumila scrubs at Rishiri Island, Hokkaido. And we examined the effects of climate and vegetation on the characteristics of soil profiles and chemical properties of soils.Kuroboku soils (Ando soils) were distributed on alluvial fan of gentle foot slope under the Sasa grassland. Under the Pinus pumila scrubs, Podzolized soils were observed on gentle mountain side slope at Mt. Rishiri. On gentle slope on summit at Mt. Rishiri, Alpine Lithosols were distributed.pH values of soil samples were decreased with elevation. It suggested that soil organic carbon was little decomposed under the high altitude site, at Mt. Rishiri. The correlation between Alp and total carbon in subsoil samples was higher than those in soil samples of surface horizons. These suggested that soil organic carbon didn't complex with alminum or iron.