内蒙古大青山天然白桦林生物量、生产力及固碳释氧价值研究

摘要

白桦林是大青山的主要天然乔木林,在大青山的生态环境中占有重要的地位.通过对天然白桦林生物量及净生产力的研究,计算出了不同龄组天然白桦林的年平均固碳释氧总价值,结果为:幼龄林(7 222.99元hm-2 a-1)＞中龄林(6 750.50元hm-2a-1)＞近熟林(5 838.27元hm-2 a-1).%Betula platyphylla,which is the main forest of the Daqing Mountain,occupies an important position in the ecological environment of the Daqing Mountain.Through studying biomass & net production of natural Betula platyphylla forest,the mean annual carbon sequestration and oxygen release value for natural Betula platyphylla forest at different age group was calculated.Result show that young forest of Betula platyphylla(7 222.99 Yuan hm-2 a-1)>half-mature forest Betula platyphylla forest(6 750.50 Yuan hm-2 a-1)>near-mature forest of Betula platyphylla forest(5 838.27 Yuanhm-2 a-1).