秦岭火地塘林区3种森林类型乔木层碳密度和碳储量研究

摘要

以秦岭火地塘林区锐齿栎(Quercus aliena var.acuteserrata)、华山松(Pinus armandi)和油松(Pinus tabulae formis)3种主要森林类型为研究对象,通过标准地调查和生物量回归模型计算其碳储量,并在此基础上估算了碳密度以及不同器官的碳储量.结果表明:不同森林类型碳密度具有显著差异,其中锐齿栎最高(118.724 t/hm2),油松次之(106.062 t/hm2),华山松最低(94.227t/hm2)；3种森林类型的碳储量均随着林分径级的增大呈现出上升、下降和再上升的趋势,而大径级碳储量的上升主要取决于大径级单株林木的出现,具有明显的随机性；碳储量在不同树种各器官的分布表现为:干＞枝＞根＞皮＞叶(锐齿栎),干＞枝＞根＞叶＞皮(华山松),干＞枝＞叶＞根＞皮(油松),且不同树种同一器官及同一树种不同器官之间的碳储量所占比重差异显著.%The carbon storage of sharptooth oak(Quercus aliena var. acuteserrata) forest,armand pine(Pinus armandi) forest and Chinese pine (Pinus tabulaeformis) forest was studied via plots investigation and regression models of biomass of the forests at Huoditang forest region in the Qinling Mountains, the carbon density and storage of different organs of the forests were also estimated. The results showed that there were significant differences among the carbon density of the three forests, sharptooth oak forest had the highest carbon density(118. 724 t/ha), follow by Chinese pine forest (106. 062 t/ha) , armand pine forest had the lowest carbon density (94. 026 t/ha). With the increase of diameter class of the stands,the carbon storage of the three forests increased first, and then decreased and finally increased again. The increased carbon storage of high diameter class depended on high diameter class trees at random. The order of carbon storage in different organs for sharptooth oak was stem-wood>branches>roots>bark> leaves. For armand pine, the order was stem-wood>branches>roots>leaves> bark. For Chinese pine the order was stem-wood>branches>leaves>roots>bark. There were significant differences among the carbon storage of the same organs of different tree species and different organs of the same tree species.