Once the humuslayer disappears, nutrients cannot be recycled and leach from the soil, converting soil from fertile to infertile and making it suitable only for savanna vegetation.
一旦腐殖质层消失，养分就无法从土壤中回收和过滤，致使土壤由肥沃变为贫瘠，只适于热带草原植被的生长。
2
Main site factors in different groups of site type existed obvious difference, for instance the altitude, the thickness of humuslayer and the slope.
不同立地类型组的海拔、腐殖质层及坡向等各主要立地因子存在着显著的差异。
3
Humuslayer in different forest types and soil surface type and quantity of soil fungal communities have a significant difference.