Research on Geological Provenances Variation and Selection of Parakmeria latungensis Phenotypic Variation of Geographic Provenance in Tsuga dumosa Variation in Seedling Growth and Nitrogen-fixing Capacityof Alnus cremastogyne Provenances Geographical Provenance Variation of Growth and Wood Basic Density of 7-Year-Old Schima superba and Its Provenance Selection Study on Geographical Provenance Variations of Dalbergia obtusifolia Prain Early Performances of Eight Provenances of Choerospondias axillaris