以22块标准地的11种密度类型杨树林分的调查资料,对潜江市以林分数量成熟与经济成熟为依据,对杨树各密度类型林分的最佳受益年限进行了研究。其结果表明:培育中小径工业用材林分,株行距为2m×3m、3m×4m的最佳受益年限为6a;培育大径工业用材林分,4m×4m为8a,4m×5m、4m×6m、5m×5m为9a;公路双排2m×10m、林网单排株距2m为10a,4m×10m为12～13a。 Based on the survey data of eleven density poplar stands of 22 standard plots, the optimal benefit years of different density poplar stands were studied on the basis of the quantity and maturity and economic maturity of stand in Qianjiang. The results showed that the best beneficial period of cultivating large-diameter industrial timber was 4m × 4m for 4m × 4m, 4m × 6m for 4m × 4m, 5m × 5m for 9a; highway double row 2m × 10m, Lin network single row spacing 2m 10a, 4m × 10m for 12 ~ 13a.