密度调控对红松人工林碳贮量及其空间格局的影响

目的]探索密度调控对红松人工林碳汇能力的影响。方法]对辽宁省草河口地区不同间伐强度红松人工林的碳贮量及其空间分布格局进行了对比研究。结果]在各间伐强度红松人工林内红松各营养器官生物量和碳贮量从大到小依次为为干、根、枝、叶,不同间伐强度红松人工林乔木层、草本层、凋落物层及土壤层碳贮量均存在差异,乔木层碳贮量从大到小依次为弱度间伐区(197.52 t/hm~2)、中度间伐区(197.10 t/hm~2)、对照区(184.75 t/hm~2)、强度间伐区(163.61 t/hm~2)、极强度间伐区(142.30 t/hm~2),土壤碳贮量从大到小依次为中度间伐区(151.93 t/hm~2)、对照区(147.18 t/hm~2)、极强间伐区(111.89 t/hm~2)、强度间伐区(91.18 t/hm~2)、弱度间伐区(79.54 t/hm~2),总碳贮量从大到小依次中度间伐区(351.42 t/hm~2)、对照区(333.63 t/hm~2)、弱度间伐区(279.11 t/hm~2)、强度间伐区(257.22 t/hm~2)、极强间伐区(257.16 t/hm~2);红松人工林内碳贮量从大到小依次为乔木层、土壤层、凋落物层、草本层。结论]该研究可为科学进行红松林碳汇核算提供科学依据。

Influence of Density Control on Carbon Deposits and Its Spatial Pattern of Pinus koraiensis Plantation

Objective] To explore the effects of density regulation on carbon sink ability of Pinus koraiensis plantation.Method]Carbon storage and spatial distribution pattern with different thinning intensity of Pinus koraiensis plantation in Caohekou Area of Liaoning Province was studied.Result]The results showed that the order of vegetative biomass and carbon storage of Pinus koraiensis in different thinning intensity from big to small was turn stem,roots,branches and leaves.There were differences in carbon reserves of artificial red tree layer,pine forest and herb layer,litter layer and soil layer in different thinning intensity.The order of layer carbon storage in tree layer from big to small was weak degrees cutting area (197.52 t/hm2),moderate cutting area (197.10 t/hm2),control area (184.75 t/hm2),strength cutting area (163.61 t/hm2),very strong cutting area(142.30 t/hm2).The order of soil carbon storage from big to small was moderate cutting area (151.93 t/hm2),control area (147.18 t/hm2),very strong cutting area (111.89 t/hm2),strength cutting area (91.18 t/hm2),weak degrees cutting area (79.54 t/hm2).The order of total carbon storage from big to small was moderate cutting area (351.42 t/hm2),control area (333.63 t/hm2),weak degrees cutting area (279.11 t/hm2),strength cutting area (257.22 t/hm2),very strong cutting area (257.16 t/hm2).The order of carbon storage in Pinus koraiensis plantation from big to small was tree layer,soil layer,litter layer,herb layer.Conclusion]The study can provide scientific basis for the scientific evaluation of carbon sequestration in Pinus roraiensis forest.