Criteria for Selecting Superior Trees of Paraserianthes falcataria

70 candidate trees, 350 dominant trees and 560 neighboring trees were selected out from 6.5-7.5 a Paraserianthes falcataria( L.) Nielsen provenances/families trials in six different areas of Guangdong province. Using the method of 5 dominant trees comparison and 8 neighboring trees standard, combing with form indexes synthetical appraisement, the criteria of superior tree selection were discussed. The result showed that as a superior tree, the DBH ( diameter at breast height) should not be less than 1.43 times of average DBH of 5 dominant trees, the height should be higher than average height of 5 dominant trees, the individual volume should not be less than 2.23 times of the average volume of 5 dominant trees, and, the sum of 0.64 times of stem form score and 0.36 times of branch score should be less than 2; or 8 neighboring trees standard value should not be less than 4, and, the sum of 0.64 times of stem form score and 0.36 times of branch score should be less than 2. The latter criteria are considered as better one for superior tree selection in the future.