中文摘要：

研究生物质能源树种千年桐人工林乔木层生物量特征及其分配规律。采用样地调查和标准木收获法测定2a、3a、5a,7a、9a生千年桐人工林乔木层生物量，建立千年桐人工林乔木层生物量回归模型，其全株的相关系数为0．9801，其他组分相关系数均在0．9093以上，具有良好的相关性。结果表明：2a、3a、5a、7a,9a生林分乔木层生物量分别为41．162t／hm2，51．15t／hm2，58．656t／hm2，114．005t／hm2，134．894t／hm2，9a生林分乔木层生物量是分别7a,5a，3a，2a生林分的1．183倍，2．300倍，2．637倍，3．277倍。各器官生物量分配中，9a生林分的树杆对乔木层生物量贡献最大，达到41．09％，贡献率最小的是2a生林分，为38．54％；7a生林分的树枝对乔木层生物量贡献率最大，达到26．1％，贡献率最小的是5a生林分，为22．8％；5a生林分的树叶对乔木层生物量贡献率最大，为13．72％，贡献率最小的是7a生林分，为10．38％；7a生林对林分的树根生物量贡献率最大，为23．68％，贡献率最小的是9a生林分，为21．52％。乔木层的生物量主要以树杆为主，杆、枝、叶、根的生物量均表现出明显随林龄增长而递增的规律。

英文摘要：

The biomass characteristics and distribution in the arbor layer were focused on in the study of Aleurites Montana as a bio-energy species. The arbor layer biomass of Aleurites Montana plantations of 2 a, 3 a, 5 a, 7 a and 9 a were determined by the method of field study and standard tree yield. Meanwhile, in the regression equa- tion of arbor layer biomass as W = a（D2H） b, the correlative coefficient of total stem was 0. 980 1 and those of other organs were above 0. 909 3, showing positive correlation. The results showed that the arbor layer biomass of 2 a, 3 a, 5 a, 7 a and 9 a Aleurites Montana were determined respectively as 41. 162 t/hm2, 51.15 t/hm2, 58. 656 t/ hm2, 114. 005 t/hm2 and 134. 894 t/hm2. The arbor layer biomass of 9 a Aleurites Montana was respectively 1. 183, 2. 300, 2.637 and 3.277 times more than that of 7 a, 5 a, 3 a and 2 a. In arbar layer biomass distribu- tion, the stems of 9 a occupied the highest proportion as 41.09% while those of 2 a occupied the lowest as 38.54% ; the branches of 7a occupied the highest as 26. 1% while those of 5 a occupied the lowest as 22.8% ; the leaves of 5 a occupied the highest as 13.72% while those of 7 a occupied the lowest as 10. 38% ; the roots of 7 a occupied the highest as 23.68% while those of 9 a occupied the lowest as 21.52%. Stem biomass contributed the most in arbor layer biomass and the biomass of stems, branches, leaves and roots obviously presented the increasing tendency with the aging of the stand.