1.Ivela ochropoda is one of the main defoliator pest occurred in Ulmus pumila, and is very serious in Wuqi County.
榆毒蛾是榆树的食叶害虫之一，在吴起县发生严重。
2.There was no poison phenomenon of Ulmus pumila L. in the whole experiments. 2.
在本试验处理浓度之内没有出现白榆受重金属毒害至死的现象。
3.Compared with Ulmus pumila, Platycladus orientalis showed stronger adjustability in the semi-arid area of Loess Plateau.
在黄土半干旱区侧柏具有比白榆更强的适应能力。
4.the extract duration and temperature also have influence on the quantity of Ulmus pumila volatile.
萃取时间和萃取温度对家榆挥发物不同组分的萃取量也有影响。
5.Wind tunnel test indicated that the volatiles of Ulmus pumila and Ricinus communis have high efficiency to attract Holotria diomphalia.
风洞生测表明，家榆和蓖麻的挥发物对东北大黑鳃金龟具有明显的引诱作用。
6.A Study on the Distant Hybridization between Populus alba Linn. And Ulmus pumila Linn.
银白杨与白榆远缘杂交的研究。
7.Study on the Relation Between the Photosynthetic Physiological Properties of Ulmus pumila and Hippophae rhamnoides and Soil Water Content
白榆沙棘光合生理参数与土壤含水量关系研究
8.The Ecological Characteristics of Ulmus gaussenii and Its Conservation Measures
醉翁榆的生境特征及保护对策
9.Research on Photosynthetic Daily Course of Ulmus crassifolia and Its Influencing Factors
南方岩榆光合作用日变化及其影响因子研究
10.Response to Light of Ulmus pumila in Different Soil Moisture
不同土壤水分条件下白榆的光响应研究