【摘要】 以金洞林场14年生闽楠木荷人工混交林为研究对象,采用树干解析和分层收获法对闽楠与木荷的生长规律以及生物量分配特征进行研究。结果表明:1)闽楠与木荷胸径的速生期均为8～12 a,胸径的连年生长量分别在10 a和12 a时达到最大值;2)闽楠与木荷树高的连年生长量分别在第12 a与第10 a时达到最大值,随后急速下降,闽楠树高连年、平均生长量在13 a左右相交;3)0～8 a时,闽楠与木荷的材积生长速度缓慢,8 a以后生长速度上升,14 a时仍处于材积增长的速生期;4)闽楠与木荷单株材积生物量分别为61.43 kg和83.29 kg,各个器官生物量大小顺序均为:树干>树根>树枝>树叶>树皮;5)林分总单位面积生物量为136.29 t·hm^-2,其中乔木层所占比值高达93.09%,各层次单位面积生物量由大到小排列顺序为:乔木层>半分解枯落物层>未分解枯落物层>草本层。更多还原

【Abstract】 The growth regularity and biomass distribution feature of 14 years old Phoebe bournei-Schima superba mixed forest in Jindong National Forest Farm in Yongzhou City, Hunan Province were investigated and studied by stem analysis method and layered cutting method. The results show that 1) The fast-growing period of DBH of P. bournei and S. superba was 8-12 years, and the annual growth of DBH of the two species reached its maximum value at 10-12 years, respectively. 2) The DBH current annual increments of P. bournei and S. superba reached the maximum at 12 th years and 10 th years respectively, then they fell sharply; The successive year increment and average annual growth of P. bournei intersected in around the 13 th year. 3) During the period of 0-8 years, the growth speed values of P. bournei and S. superba all were slow, and the growth speed values increased after the 8 th year; At the 14 th year, that was still in the fast-growing period of volume growth. 4) The values of volume biomass per plant of P. bournei and S. superba were61.43 kg and 83.29 kg, respectively, and the order of biomass of organs from big to small was: trunk > root > branch > leaf > bark. 5)The total biomass per unit area of the forest was 136.29 t·hm^-2, of which the ratio of arbor layer biomass was as high as 93.09%, and the order of biomass per unit area from large to small was as follows: arbor layer > semi-decomposed litter layer > undecomposed litter layer > herb layer.更多还原