【Key words】 plantation; natural forest; population attribute; plant diversity; similarity; loess plateau; Ziwuling Mountain
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Ziwuling East Hill, north mountain sheep pen, Liupanshan west, east, west, north uplift, central and southern low-, it is "basin" of.
东倚子午岭，北靠羊圈山，西接六盘山，东、西、北三面隆起，中南部低缓，故有“盆地”之称。
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