Study on Moss Distribution Law in Different Altitude on North Slope of Qilian Mountains

The distributive law of moss on north-slope of Qilian Mountains was mainly elaborated in this paper. Through the plot(20 m×20 m) investigation of different altitude step in Picea crassifolia forest, it was discovered that the relation of moss's thickness and coverage degree with altitude is positive correlation in arbor belt, while it is negative correlation in shrub belt. So the moss mainly distribute in arbor belt and it is very sparse in shrub belt.