Detection of Mycoplasmalike Organism of Paulownia Witches′-Broom with DAPI Fluorescence Microscopy DISCOLORATION OF PAULOWNIA WOOD: SUSCEPTIBILITY OF EXTRACTIVES Study on the Effects of Fertilization on Middle-aged Paulownia elongata Plywood Plantation Study on Optimum Management Density and Crop Age of Plvwood-oriented P.elongata Plantation A STUDY ON OPTIMUM NUTRIENT REQUIREMENTS OF PAULOWNIA ELONGATA AND ROBINIA PSEUDOACACIA SEEDLINGS Quantitative study on biomass accumulation of Paulownia elongata AUTOTETRAPLOID INDUCTION OF Paulownia elongata WITH COLCHIONE Research on the Structure of Paulownia elongata Stand Potential Effect of Extracts of Roots of Malus pumila and Populus canadensis on Wheat Growth A Preliminary Study on the Effect of the Main Climatic and Edaphic Factors on the growth of Paulownia elongata Study on cold resistance of top buds of Paulownia elongata‘s seedlings Genetic Relationships among Paulownia elongata, Paulownia fortunei and Paulownia tomentosa Based on cpDNA rps16 Region Sequences