您要查找的是不是：
- The site, an evenly sloped lawn, had two allees of cedar elms( Ulmus crassifolia)， planted circa1936, cutting across its entire width, perpendicular to the slope. 基地中，均匀的草坡上两排大约植于1936年的榆杉树列切穿了基地全宽，垂直于草坡。
- The site, an evenly sloped lawn, had two allees of cedar elms (Ulmus crassifolia), planted circa 1936, cutting across its entire width, perpendicular to the slope. 基地中，均匀的草坡上两排大约植于1936年的榆杉树列切穿了基地全宽，垂直于草坡。
- The site, an evenly sloped lawn, had two allees of cedar elms (Ulmus crassifolia)，planted circa 1936, cutting across its entire width, perpendicular to the slope. 基地中，均匀的草坡上两排大约植于1936年的榆杉树列切穿了基地全宽，垂直于草坡。
- 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
- Ulmus crassifolia 南方岩榆
- Bergenia crassifolia (L.) Fritsh. 厚叶岩白菜
- Study on grafting skill of Picea crassifolia Kom. 青海云杉嫁接技术的研究。
- Technology of Grafting Ulmus pumila var, pendula Rehd. 垂榆嫁接技术。
- Chemical Control Technique for Seed Pest in Picea crassifolia kom. 青海云杉种实害虫化学防治技术。
- 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。
- Direct shoot organogenesis and plant regeneration in Fortunella crassifolia. 杨莉，徐昌杰，胡桂兵，陈昆松.
- An elm tree(Ulmus alata) of the southeast United States,having twigs with winged,corky edges. 翅榆一种美国东南部榆树（翼枝长序榆榆属），具有有翼和软木质的小枝
- Preliminary analysis on genetics of phenotype measuration of plus tree of Ulmus pumita Linn. 白榆优树表型测定的遗传学初步分析。
- The order of height was Picea sitchensis, Picea abies, Picea glauca, Picea arian, Picea crassifolia, Picea balfouriana. 6个种的 1年生云杉以苗高进行排序 :西加云杉 >欧洲云杉 >白云杉 >黑云杉 >青海云杉 >川西云杉。 欧洲云杉、白云杉、黑云杉各个种的不同种源间有很大的变异及选择潜力。
- 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。
- 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。
- The genetic variation of eight isozyme expressed by twelve gene loci among 3 natural populations of Picea crassifolia was studied by the aids of PAGE electrophoresis. 摘要采用聚丙烯酰胺凝胶电泳实验对青海云杉的3个天然群体（甘肃祁连山、青海大通，甘肃甘南州）的12个基因位点表达的8种同工酶的遗传变异模式进行了研究。
- 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
