DISTRIBUTION AND GROWTH CHARACTERISTICS OF THE ROOT SYSTEMS OF POPLAR,WILLOW,ELM AND LOCUST ON SITE OF RENEWED LAND BY FINE ASH OF COAL Effect of ecological factors and physiological factors on the net photosynthetic rate of Ulmus pumila at various growth stages Conservation strategies for Ulmus elongata based on the analysis of biological and ecological factors Isolation and Preservation of Viable Sperm Cells of Ulmus pumila A New Ulmus pumila Cultivar‘Yangguang Nühai’ Phenotypic Diversity of Leaves Morphologic Characteristics of Ulmus lamellosa Natural Populations in Shanxi Functional Diversity of Ulmus lamellosa Community in the Taiyue Mountain of Shanxi Ecological Gradient Analysis and Environmental Interpretation of Ulmus lamellosa Communities in the Taiyueshan Reserve, Shanxi Influence of Different Media Formulas on Container-growingSeedling Quality of Ulmus pumila cv. jinye Photosynthetic Characteristics and Leaf Coloration Mechanism of the Next Generation of Golden Ulmus pumila Phenotypic Diversity of Leaves Morphologic Characteristics of Ulmus lamellosa Natural Populations in Shanxi A New Ulmus pumila Cultivar‘Yangguang Nanhai’ Diffusion of elm seed rain in Otindag Sand Land A New Ulmus pumila Cultivar‘Yangguang Nühai’ Studies on the Biology and Control of Agenocimbex ulmusvora (Hymenoptera:Cimbicidae) Study on Ulmus lamellosa Community Characteristics and Species Diversity in the South of Shanxi Estimating nonstructural carbon content of tree crown considering its spatial variability: A case study on Juglans mandshurica and Ulmus japonica. Photosynthetic Characteristics and Chlorophyll Fluorescence Parameters of Celtis sinensis and Ulmus pumila L. Seedling under Salt Stress Spatial pattern of seedling regeneration of Ulmus pumila woodland in the Otindag Sandland THE INVESTIGATION OF SELECTION AGE IN WHITE ELM PROVENANCE TEST STUDY ON THE LOSSES CAUSED BY XYLOTRECHUS NAMANGANENSIS Heydel Spatial difference and regularity of seed dispersal of Ulmus macrocarpa in Horqin Sandy Land, China Effects of salt stress on physiological characters and salt-tolerance of Ulmus pumila in different habitats. Structure Types of Plant Species of Ulmus Woodland in China’s Songhua-Nenjiang Plains Programmed Cell Death of Ulmus pumila L.Seeds during Aging and ROS-caspse-3 like Pathway Mechanism Leaf nutrient contents and photosynthetic physiological characteristics under Ulmus pumila and Robinia pseudocacia mixed plantation A New Ulmus pumila Cultivar‘Yangguang Nanhai’ A New Species of Leafhopper Injurious to Ulmus pumila (Hemiptera:Cicadellidae:Euscelinae) Effects of simulated salt stress on seed germination, seedling emergence and growth of Ulmus pumila Studies on the Pollen Morphology of the Genus Ulmus L. in China and Its Taxonomic Significance Effects of different seedling stock types on root growth of Platycladus orientalis and Ulmus pumila′s transplants Study on niche of population of Ulmus lamellosa in the south area of Shanxi province Carbon density characteristics of sparse Ulmus pumila forest and Populus simonii plantation in Onqin Daga Sandy Land and their relationships with stand age A comparative researches on the development of elm seedlings in four habitats in the Hunshandak Sandland, Inner Mongolia, China Herbalogical textual research of Wuyi Interspecific relationship of rare and endangered Ulmus lamellosa community in Taiyue Moutain of Shanxi Leaf nutrient contents and photosynthetic physiological characteristics of Ulmz us pumila-Robinia pseudocacia  mixed forests. Ulmus mianzhuensis, a new species of Ulmaceae from Sichuan,China Affection of aridity to anatomical structure of leave of Ulmus pumila L. var. sabulosa INVESTIGATION ON THE DEATH REASON OF ELMS AS WELL AS DISCUSSION ON THE EXISTANCE OF DUTCH ELM DISEASE IN CHINA Techniques for the Seedling Culture of Ulmus laciniata Preliminary Research on the Role and Mechanism of Nitric Oxide during Elm Seeds Ageing Interspecific Segregation of Rare and Endangered Plant Ulmus lamellosa Communities in Shanxi Province Effect of Paclobutrazol on Drought-Resistance of Populus alba × Populus berolinensis, Ulmus pumila, and Betula platyphylla The improved model of plant ecological field and the case analyzing 10-YEAR RESULTS OF PROGENY AND CLONAL TESTS FOR ULMUS PUMILA IN CHINA THE SELECTION OF FAST GROWING,HIGH RESISTANCE TO PYRRHALTA AENESCENS SUPERIOR CLONE #65212 FOR ULMUS PUMILA The Spatial Point Pattern of Ulmus pumila Population in Two Habitats in the Otindag Sandy Land