关键词: 群状择伐, 人工更新, 华北落叶松, 生物量, 碳储量

Abstract: In order to expound the influence of gap area on carbon reserve of planted saplings as well as influence of selective cutting and artificial regeneration on carbon reserve of shrubbery,grasses and litter of Larix principis-rupprechtii Mayr.low efficiency stands,the changing rule of carbon storage about sapling,shrub-grass and litter within the holes of 0.02hm²,0.03hm² and 0.05hm² were investigated.The results showed that,for biomass,artificially planted larix pricipis-rupprechtii biomass increased with the increase of selective pore area,artificially planted Betula platyphylla reaches maximum value in the area of 0.03 hm².When selective hole covers an area of 0.03 hm²,shrub biomass reached maximum.In different selective areas,the herb biomass of selective cutting hole with planting Larix principis-rupprechtii Mayr.was higher than Betula platyphylla.Along with the rising of the selective cutting hole area,the litter biomass reduced gradually,and the litter biomass within the hole planting Betula platyphylla was higher.For carbon storage,within the hole of same planted tree species,with the increase of the area of selective cutting hole,carbon storage of Betula platyphylla sample plot showed a trend of decreasing,while Larix principis-rupprechtii Mayr.sample plot showed the carbon storaye climbs up and then declines.In the same selective cutting area,planted Larix principis-rupprechtii Mayr.’s total carbon storage was relatively higher than Betula platyphylla.When selective cutting hole covers an area of 0.03 hm²,the sample area’s total carbon storagesof planted Larix principis-rupprechtii Mayr was maximum.

Key words: groupselection cutting, artificial regeneration, Larix principis-rupprechtii Mayr., biomass, carbon storage