1·The grafting and cutting propagation tests of Ulmus pumila cv.
对中华金叶榆进行嫁接和扦插繁殖试验。
2·Ulmus pumila open forest ecosystem plays an important role in Otindag Sandy Land.
榆树疏林生态系统是浑善达克沙地的重要组分之一。
3·The best regression models (e. g. Ulmus pumila) of leaf content against air SO2 and leaf stomatic resistance could explain that the sulfur acted as pollutant entered plant mainly through stoma.