Abstract: Based on the data of surface temperature on Southwest slope edge of ever-green broad-leaved forest in Ailao Mountain, the characteristics and differences of horizontal and vertical distribution of surface temperature on different thermal active surfaces were discussed in this paper. The findings showed that thermal effect of vertical active surface could not be neglected at the edge of fragmented forest.Vertical active surface of edge was a new thermal active surface with the exception of forest canopy surface, soil surface in and out of the forest. The study will be useful for us to understand microclimatic and biological effect of forest edge.

Key words: Rare earths, Urea, Mineral N, Nitrification, Lu visol