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- Abstract The temporal and spatial changes of ulmus pumila phenology and the relationship with climate factors in Northeast China from 1980 to 2005 were discussed. 摘要 探讨了1980-2005年中国东北榆树物候的时空变化与气候因子的关系。
- Ulmus pumila phenology 榆树物候
- Otherwise, the phenology phases of ulmus pumila are not significantly related to precipitation and sunshine duration. 研究表明，榆树物候与降水、日照关系不显著。
- Technology of Grafting Ulmus pumila var, pendula Rehd. 垂榆嫁接技术。
- Experiment on Grafting and Planting of Ulmus pumila var. Pendula Rehd. 垂榆嫁接及栽植的试验研究。
- A Preliminary Study on the Mathematic Model of Leaf Area of Ulmus pumila Linn. 与相似的文献。
- 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。
- When Urochela quadrinotata Reuter harms Ulmus pumila,the spread of disease will take a turn for the worse. 红足壮异蝽的危害能加重病害的流行和扩展。
- Title： Effect of salt stress on activity of superoxide dismutase (SOD) in Ulmus pumila L. 关键词：白榆;盐胁迫;电解质相对外渗率;超氧物歧化酶
- The main plant are Ulmus pumila and Celtis bengeana community, Acer mono and Quercus mongolica community. 天然残存林植被，主要为榆树、小叶朴群落和色木、蒙古柞群落。
- Ivela ochropoda is one of the main defoliator pest occurred in Ulmus pumila, and is very serious in Wuqi County. 摘要榆毒蛾是榆树的食叶害虫之一，在吴起县发生严重。
- Spatial patterns of main woody plant populations are aggregative, Ulmus macrocarpa, Acer mono, Ulmus pumila populations in some communities are random. 主要木本植物种群的分布格局大多为集群型，只有部分群落中大果榆、色木槭及家榆种群为随机分布。
- While the Ulmus pumila had the longest growth peak then Elaeagnus angustifolia,Populus euphratica,and Tamarix chinensis in turn. 生长高峰期到达的时间不同,白榆生长高峰期最长,其次为沙枣、胡杨、柽柳;
- In recent years, Tomapoderus ruficollis Fabricius which is subordinate to Tomapoderidae of Coleoptera was found to harm elm (Ulmus pumila L.) as a kind of new leaf eaten pest. 榆锐卷象（TomapoderusruficollisFabricius）属鞘翅目卷象科，是近年来新发现为害榆树的一种食叶性害虫。
- This paper considered it cause the death of Ulmus pumila that Ulmus pumila withered disease had been infected and popular,through the test of separating,culture and inoculating. 根据分离培养和接种试验结果，认为白榆死亡是由白榆干枯病感染流行造成，病原菌为茎点霉菌。
- Among six kind trees observed,SOD activity of Picea koraiensis,Salix matsudana,Populus berolinensis and Ulmus pumila in pollution areas is higher than comparison. 供试的6种树木中,云杉、旱垂柳、中东杨、白榆的SOD活性污染区高于对照区;
- Ulmus pumila L. 家榆
- The formation of the tree species of the coastal forest is rather simple, represented by Robinia preudoacacia and Ulmus pumila in the north,Casuarna equsetifolia and Eucalyptus spp. in the south. 海防林树种组成简单，在北段多以刺槐、榆树为主，南段则有木麻黄、桉树等少数几种。
- The main tree species have tabulaeformis, poplar, dry trees, Ulmus pumila, Larix andza mu and so on, the shortage of forest products processing and four very broad prospects for development. 主要树种有油松、杨树、旱树、白榆、落叶松及杂木等，林产品加工和四荒开发的前景十分广阔。
- Rupr.) and elm ( Ulmus pumila L.) 、榆树(Ulmus pumila L.;)
