基于可加性生物量模型的大兴安岭东部主要林型森林植被碳储量及其分配

Carbon storage of forest vegetation and allocation for main forest types in the east of Daxing'an Mountains based on additive biomass model

基于大兴安岭东部地区主要林型的生物量调查数据,建立了3个主要树种的一元可加性生物量模型,探讨了不同林型森林群落和乔木层、灌木层、草本层、凋落物层的碳储量及其分配规律.结果表明:杜鹃-兴安落叶松林乔、灌、草、凋落物层碳储量分别为71.00、0.34、0.05和11.97 t·hm^(-2),杜香-兴安落叶松林各层碳储量分别为47.82、0.88、0和5.04 t·hm^(-2),杜鹃-兴安落叶松-白桦混交林分别为56.56、0.44、0.04、8.72 t·hm^(-2),杜香-兴安落叶松-白桦混交林分别为46.21、0.66、0.07、6.16 t·hm^(-2),杜鹃-白桦林分别为40.90、1.37、0.04、3.67 t·hm^(-2),杜香-白桦林分别为36.28、1.12、0.18、4.35 t·hm^(-2).林下植被为杜鹃的林分群落碳储量大于林下植被为杜香的林分;林下植被相似的情况下,森林群落碳储量大小顺序为:兴安落叶松林>兴安落叶松-白桦混交林>白桦林;不同林型群落碳储量不同,大小顺序为:杜鹃-兴安落叶松林(83.36 t·hm^(-2))>杜鹃-兴安落叶松-白桦混交林(65.76 t·hm^(-2))>杜香-兴安落叶松林(53.74t·hm^(-2))>杜香-兴安落叶松-白桦混交林(53.10 t·hm^(-2))>杜鹃-白桦林(45.98 t·hm^(-2))>杜香-白桦林(41.93 t·hm^(-2)),且不同林型森林群落碳储量垂直分配规律为:乔木层(85.2%~89.0%)>凋落物层(8.0%~14.4%)>灌木层(0.4%~2.7%)>草本层(0~0.4%).

Based on the biomass investigation data of main forest types in the east of Daxing’an Mountains, the additive biomass models of 3 main tree species were developed and the changes of carbon storage and allocation of forest community of tree layer, shrub layer, herb layer and litter layer from different forest types were discussed. The results showed that the carbon storage of tree layer, shrub layer, herb layer and litter layer for Rhododendron dauricum-Larix gmelinii forest was 71.00, 0.34, 0.05 and 11.97 t·hm^-2, respectively. Similarly, the carbon storage of the four layers of Ledum palustre-L. gmelinii forest was 47.82, 0.88, 0, 5.04 t·hm^-2, 56.56, 0.44, 0.04, 8.72 t·hm^-2 for R. dauricum-mixed forest of L. gmelinii-Betula platyphylla, 46.21, 0.66, 0.07, 6.16 t·hm^-2 for L. palustre-mixed forest of L. gmelinii-B. platyphylla, 40.90, 1.37, 0.04, 3.67 t·hm^-2 for R. dauricum-B. platyphylla forest, 36.28, 1.12, 0.18, 4.35 t·hm^-2 for L. palustre-B. platyphylla forest. The carbon storage of forest community for the understory vegetation of R. dauricum was higher than that of the forest with L. palustre. In the condition of similar circumstances for the understory, the order of carbon storage for forest community was L. gmelinii forest 〉 the mixed forest of L. gmelinii-B. platyphylla 〉 B. platyphylla forest. The carbon storage of different forest types was different with the order of R. dauricum-L. gmelinii forest （83.36 t·hm^-2）〉 R. dauricum-mixed forest of L. gmelinii-B. platyphylla （65.76 t·hm^-2） 〉 L. palustre-L. gmelinii forest （53.74 t·hm^-2）〉 L. palustre-mixed forest of L. gmelinii-B. platyphylla （53.10 t·hm^-2）〉 R. dauricum-B. platyphylla forest （45.98 t·hm^-2） 〉 L. palustre-B. platyphylla forest （41.93 t·hm^-2）. The order of carbon storage for the vertical distribution in forest communities with different forest types was the tree layer （85.2%-89.0%） 〉 litter layer （8.0%-14.4%） 〉 shrub layer （0.4%-2.7%） 〉 herb layer （0-0.4%）.