Abstract:Yellow River Delta soil salinity is high,groundwater is salt-water,it's level is shallow,site conditions of trees growth is poor,only a few salinity-alkalinity resistance species can survive,which seriously restrict the woods pulp paper integration.To do the research work of Populus L.introduction and necessary cultivation techniques,both to improve ecological environment and enrich the Yellow River Delta region's trees resource,promote the organic unity of the ecological,social and economic benefit of "thr...