我国东北地区蒙古栎林生物量及生产力的研究

Study on the biomass and productivity of Mongolian oak forests in northeast region of China

对我国东北地区常见5种蒙古栎林乔木层生物量和生产力研究的结果表明,各林分生物量依次为榛子蒙古栎林(249754.45 kg/hm2)>高产栎林(184750.00 kg/hm2)>胡枝子蒙古栎林(128312.00 kg/hm2)>杜鹃蒙古栎林(124573.16 kg/hm2)>矮栎林(42974.50 kg/hm2),各林分乔木层生物量主要分布在数量较少的大径级林木中,大径级林木在森林生态系统生物量构成中占主导地位。几种次生林乔木层生物量由大到小依次为榛子蒙古栎林>白桦林>高产栎林>杂木林>胡枝子蒙古栎林>杜鹃蒙古栎林>山杨林>硬阔叶林>矮栎林。各林分净生产力依次为榛子蒙古栎林(18701.3kg/hm2.a)>矮栎林(7682.6kg/hm2.a)>杜鹃蒙古栎林(7622.1kg/hm2.a)>胡枝子蒙古栎林(7588.5kg/hm2.a)>高产栎林(6984.0kg/hm2.a)。

The research on arborous layer biomass and productivity of 5 kinds of Mongolian oak forests （ Quercus Mongolia ）was performed. The results show that according to the biomass, the Mongolian oak forests are ranked in a descending order as follows： filbert oak forest（ 249754.45kg/hm^2 ）, high production oak forest（ 184750.00kg/hm^2 ）, lespedeza oak forest（ 128312.00kg/hm^2 ）, rhododendron oak forest（ 124573.16kg/hm^2 ）, oak coppice （ 42974.50kg/hm^2 ）. The biomass of most stands is distributed in the trees which are bigger in diameter and less in number. The comparison between the biomass of the oak forests and that of other secondary forests in northeast region of China shows that filbert oak forest〉 birch forest 〉 high production oak forest 〉 miscellaneous tree forest 〉 lespedeza oak forest 〉 rhododendron oak forest 〉 mountain polar forest）hard broad-leaved forest〉oak coppice. The net productivity of the oak forests is 18701.3kg/hm^2 ·a for filbert oak forest, 7682.6kg/hm^2 ·a for oak coppice, 7622. l kg/hm^2 ·a for rhododendron oak forest, 7588.5kg/hm^2 ·a for lespedeza oak forest,6984.0kg/hm^2.ca for high production oak forest.