南亚热带中山区铁坚油杉生物量及碳储量研究

分析了南亚热带中山区的铁坚油杉天然林乔木层、灌木层、草本层和凋落物层的生物量和碳储量以及分配格局,为提高该地区碳储量提供参考依据。在天然铁坚油杉林内设定标准样地,采用标准样方收获法和标准木法测定生态系统的生物量和碳储量。(1)铁坚油杉天然林生态系统总生物量为239.61 t/hm~2,乔木层为237.65 t/hm~2,灌草层为0.18 t/hm~2,凋落物层为1.78 t/hm~2,生物量主要集中在乔木层。(2)植被层各组分有机碳含量相差不大,为介于465.22~512.17 g/kg之间;各组份间的碳含量无显著性差异,0~20 cm层土壤层碳含量高达12.55 g/kg,土壤层碳含量随着土壤深度增加而逐渐降低,随着深度增加碳含量降低程度变小。(3)生态系统总碳为134.55 t/hm~2,其中植被层为68.45 t/hm~2,乔木层为67.54t/hm~2,碳储量相对高,植被层的碳储量主要集中在乔木层,所占比例高达98.70%;土壤层碳储量为66.10 t/hm~2,该生态系统碳储量集中在土壤层和乔木层,且两者所占比例接近,分别为50.20%、49.13%。铁坚油杉天然林生态系统生物量和碳储量相对较高,土壤固碳能力较强,应进行合理保护利用。

Biomass and Carbon Storage of Keteleeria davidiana NaturalForest in South Subtropics Mountain

Analysed of the southern subtropical mountains keteleeria davidiana natural forest tree layer, shrub layer, herb layer biomass and carbon stocks,to provide reference for improving the region's carbon stocks.To set a standard permanent plot in the keteleeria davidiana natural forest.Based on the data collected from a standard permanent plot and Standard wood in Biomass and carbon storage.(1) The total vegetation biomass of keteleeria davidiana natural forest ecosystems was 239.61 t/hm2, the arbor layer was 237.65 t/hm2, shrubs and herbaceous layer 0.18 t/hm2, litter layer 1.78 t/hm2, biomass is mainly concentrated in the tree layer.(2) The components of vegetation layer of the organic carbon content smaller difference, between 465.22~512.17 g/kg ranged;between the carbon content of each component was no significant difference.0~20 soil layer carbon content of up to 12.55 g/kg, carbon content of soil layer decreased with soil depth, Increasing depth smaller reduction in the carbon content.(3) Total ecosystem carbon storage was 134.55 t/hm2, vegetation layer 68.45t/hm2, reserves were high;arbor layer was 67.54 t/hm2, vegetation carbon storage layer was mainly concentrated in the arbor layer, the proportion up to 98.70%;Soil layer was 66.10 t/hm2,the ecosystems are mainly concentrated in the soil layer and the arbor layer, both the proportion of relatively close, respectively 50.20%, 49.13%.Biomass and carbon storage of the ecosystem is relatively high, strong soil carbon sequestration, should be reasonable protected and utilize.