鼎湖山马尾松、荷木混交林生态系统碳素积累和分配特征

Carbon Accumulation and Distribution in Pinus massoniana and Schima superba Mixed Forest Ecosystem in Dinghushan Biosphere Reserve

摘要:

选取鼎湖山保护区3个马尾松(Pinusmassoniana)、荷木(Schimasuperba)针阔混交林样地,研究其生态系统的碳素积累和分配特征。结果表明,鼎湖山马尾松、荷木混交林乔木层生物量(t hm^-2)为:174.41-270.11,平均227.36,且均以马尾松的生物量居多(占54.9%-84.4%)。林下层植物生物量和地表现存凋落物量(t hm^-2)分别为7.41-28.28和7.06-11.56,平均14.41和9.03。三个混交林生态系统总碳贮量(t hm^-2)分别为146.35、215.30和205.79,平均为189.15,其中植被层碳贮量贡献率最大,依次占62.9%、61.9%和69.9%,平均65.0%;土壤层贡献率次之,依次占34.3%、35.5%和28.5%,平均32.8%；而地表现存凋落物层的贡献最小,仅占2.8%、2.6%和1.6%,平均为2.3%。此外,本文还对该生态系统植被碳吸存潜力进行了讨论。

Abstract:

Carbon accumulation and distribution were studied in vegetation and soil for Pinus massoniana and Schima superba mixed forest ecosystem in Dinghushan Biosphere Reserve. The biomass of trees in three plots ranged from 174.41 t hm^-2 to 270.11 t hm^-2, with an average of 227.36 t hm^-2, which was contributed mainly by Pinus massoniana (54.9%-84.4%). The biomass of understory plants was 7.41-28.28 t hm^-2, with an averages of 14.41 t hm^-2. Standing stock of ground litter was 7.06-11.56 t hm^-2, with an average of 9.03 t hm^-2. Total carbon storage of the forest ecosystems ranged from 146.35 t hm^-2 to 215.30 t hm^-2. Of total carbon, 61.9%-69.9% was distributed by vegetation component, 28.5%-35.5% by soil, only 1.6%-2.8% by standing ground litter layer. Potential carbon sequestration in forest vegetation is discussed.