辽宁冰砬山不同林龄蒙古栎次生林生物量和生产力初探

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。该文以冰砬山3个年龄阶段的蒙古栎次生林为研究对象,采用标准木收获法建立了生物量与胸径的相对生长方程,推算了各林龄的生物量、生产力及其分配规律。结果表明：幼龄林、中龄林和近熟林的乔木层生物量分别为112.09 t.hm^-2、224.92 t.hm^-2和276.18 t.hm^-2。蒙古栎林分配到其地上生物量的比例,随着林龄的增加而增大,与此同时分配到根系生物量的比例从幼龄林的36%下降到28%。蒙古栎林乔木层的年平均净生产力在中龄林达到最大12.13 t.hm^-2.a^-1,比幼龄林和近熟林分别高3.43 t.hm^-2.a^-1和1.42 t.hm^-2.a^-1。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（45%）〉树干（30%）〉根（18%）〉枝（7%）。

Biomass and net primary productivity of Quecus mongolica plantation in Binglashan Mountains in Liaoning Province

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 3 different ages in Quecus mongolica plantations located in Binglashan Mountains（Northeast of China）.The main results were as follows total biomasses of arbor in young-aged,middle-aged and near-mature aged were 112.09 t·hm^-2,224.92 t·hm^-2 and 276.18 t·hm^-2,respectively.The proportions of above-ground biomass were increased with stand age,but the proportions of root biomass were decreased from 36% to 28%.The net primary productivity of arbor were fluctuated with stand age,it could up to 12.13 t·hm^-2·a^-1 for middle-aged stand which higher than the productivity of young and near-mature aged stand 3.43 t·hm^-2·a^-1 and 1.42 t·hm^-2·a^-1,respectively.The average proportions of different organs of the total productivity in all stand ages were in sequence of leaves（45%） stem（30%） root（18%） branches（7%）.