There is a close relationship between forest biomass and fixed carbon of forest ecosystems. In this paper, a group of allometric growth equations were established to estimate the allocation patterns of biomass and net primary productivity at 4 different ages in Larix olgensis plantations located in Bingla Mountains (Northeast of China). The main results are as follows: (1) Total biomass of community at different vegetative stages were 154.0t-hm"2, 179.3t-hm-2, 229.4t-hm-2 and 254.8 t-hm-2 for juvenile, middle-aged, near-mature and mature stand respectively. And the proportions of arbor were more than 94%. The net primary productivity of arbor were decreased with stand age, it could up to 16.71t-hm-2·a-2 for juvenile which was higher than the productivity of mature forest near 1 times. The average proportions of different organs of the total productivity in all stand ages were in sequence of leaf (46%)> stem (39%)> root (10%)> branches (5%).%森林生物量和生产力直接关系到森林生态系统的固碳能力.以冰砬山4个年龄阶段的长白落叶松(Larix olgensis)人工林为研究对象,采用标准木收获法建立生物量与胸径的相对生长方程,推算各林龄的生物量、生产力及其分配规律.结果表明:幼龄林、中龄林、近熟林和成熟林的群落生物量分别为154.04t· hm-2· a-1、179.29t· hm-2· a-1、229.40t·hm-2· a-1和254.78t· hm-2· a-1,其中乔木层生物量占群落生物量的比例达94％以上.不同年龄阶段的落叶松人工林乔木层的年平均净生产力均较高,并随着林龄的增大而下降,幼龄林乔木层的生产力可高达16.71t· hm-2· a-1,比成熟林的生产力高出近1倍.在所有不同年龄阶段,各器官的生产力占总生产力的比例平均为:叶(46％)＞树干(39％)＞根(10％)＞枝(5％).
展开▼
