五种榆树在榆阳区的生长适应性研究

Study on the Growth Adaptability of 5 Species of Elm in Yuyang Area

为了丰富榆阳区榆树种类,给当地植树造林、改善生态环境以及城乡绿化提供更多优良榆树种类,从新疆和河南引进了裂叶榆、圆冠榆、大叶垂榆和金叶榆,与榆阳区乡土树种白榆对照进行生长适应研究,结果表明:4种引进榆树均可以成活生长,除白榆之外,裂叶榆和金叶榆能够完成生长、开花、结果及果实成熟等整个生命周期。生长量由大到小依次为裂叶榆、圆冠榆、大叶垂榆和金叶榆。新引进的4种榆树分别作为风沙治理、改善生态环境以及市内观赏景观树种可在榆阳区引种推广应用。

In order to enrich the species of elm trees in Yuyang district, provide more excellent species of elm trees for local afforestation, ecological environment improvement and urban and rural greening, elms were introduced from Xinjiang and Henan including Changzhi elm, Yuanguan elm, Dayechuiyu elm and Jinye elm. The results showed that all 4 species of introduced elm trees could grow successfully. Except Baiyu elm, Changzhi elm and Jinye elm could complete the whole process of growth, flowering, fruiting and ripening. In terms of growth, the best order was Changzhi elm, followed by Yuanguan elm, Dayachuiyu elm and Jinye elm. According to different uses, it can be introduced and applied in Yuyang area as wind break and sand control, improving ecological environment in the city.