Detection of Antioxidant Enzymes and DNA Dynamic Changes during Senescence of Eucalyptuses Phellogen Zone Effectiveness of in vitro Mycorrhizal Inoculation of Tissue Cultured Eucalyptus grandis×E.urophylla in Field Trials Community analysis of undergrowth vegetation in industrial plantation of Eucalyptus grandis×E.urophylla Study on the adaptability of Eucalyptus grandis× E.urophylla in karst hills(Ⅰ):photosynthetic physiological ecology characteristics in spring EFFECT OF STEM EXTRACTS OF EUCALYPTUS LH22 AND U6 CLONES ON THE ROOTING OF MUNG BEAN CUTTINGS AND ON GERMINATION OF SEEDS Effects of the Age of the Ortet on Oxidize-Resistant Physiology of Young Forest of Eucalyptus grandis×E.urophylla Analysis of volatile constituents of different years old of E.grandis×E.urophylla leaf by GC-MS STUDY ON THE FOREST LAND CLEARANCE WAYS OF EUCALYPTUS GRANDIS×E.UROPHYLLA SECOND-GENERATION SPROUT REGENERATION STAND Changes in Leaf Endogenous Hormones of Eucalyptus grandis×E.urophylla in Different Generations of Vegetative Propagations Genetic Analysis and Breeding Value Estimation of Seedling Seed Orchard of Eucalyptus urophylla I.Establishment Based on Backward Selection Rotation of Eucalyptus grandis ×E. urophylla Plantation for Pulp and Paper Above ground Primary Productivity and Nutrient Cycling of Eucalyptus grandis ×E.urophylla Plantation Seasonal Variations in Photosynthesis and Water Use Efficiencyof Eucalyptus grandis × E. urophylla GENETIC VARIATION IN GROWTH AND WOOD PROPERTIES OF F1 PROGENIES OF EUCALYPTUS UROPHYLLA ×E.GRANDIS