Abstract: The drought-resistant,acid-tolerant,and fast-growing trees were selected from the resistant and fast-growing provenances,and their acid-and aluminum-tolerance were tested in vitro.The assemble genetic gain of the selected 17 acid-tolerant clones and 6 aluminum-tolerant clones accounted for 26.2%~106.3%.The acid-or aluminum-tolerance of these clones will be further tested in field.