大烟筒林场森林资源调查及乔木层碳储量估算

Forest Resource Survey and Tree Layer Carbon Storage Estimation of Dayantong Forest Farm

经过对大烟筒林场进行二类调查,本研究掌握了大烟筒林场森林资源的基本数据,基于该林场的数据,作者对大烟筒林场森林进行了区划,划分了立地类型,分析了森林资源现状及特点;同时基于森林调查数据,选取合适的生物量-蓄积量转换方程估算大烟筒林场乔木层碳储量。经过统计分析,本研究估算出本期大烟筒林场乔木层总碳储量为3.362 8×105t,乔木层碳储量密度为29.59 t/hm2。其中天然林乔木层碳储量为2.555 1×105t,是人工林和人工混交林总和的3.16倍,各龄组碳储量大小为中龄林(1.669 9×105t)>幼龄林(1.214 0×105t)>近熟林(0.466 6×105t)>成熟林(0.0123 3×105t),幼、中龄林是目前大烟筒林场碳储量的主体,占乔木层碳储量的85.7%;各林型乔木层碳储量密度差异较大,其中樟子松人工林碳储量密度最高,达到了51.24 t/hm2,人工软阔叶混交林最低,仅为4.72 t/hm2。

Through forest survey on Dayantong forest farm, the basic characteristics of forest resources were obtained. Based on the survey data, the forest was divided by site types and the present situation and characteristics of forest resources in this forest farm were analyzed. Meantime, based on the data of forest survey, the proper biomass and volume transformation equations were selected to estimate the layer carbon storage of forest stand in this forest farm. The results showed that the total carbon storage of tree layer in Dayantong forest farm was 3. 362 8 ×10^5 t, and the density of carbon storage of tree layer was 29. 59 t/hm^2. The tree layer carbon storage of natural forest was 2. 555 1 ×10^5 t which was 3.16 times of the sum of plantation stands and mixed plantations. The order of carbon storage was middle age stand （ 1. 669 9 ×10^5t） 〉 young age stand（ 1. 214 0×10^5t） 〉 near - mature stand（0. 466 6 ×10^5 t） 〉 mature stand（0. 012 33 ×10^5t）. Young and middle age stands are the main body of carbon storage in this forest farm, accounting for 85.7% of the total carbon storage. The difference of carbon density on each forest stand was obvious ; Pinus sylvestris plantation stand had the highest carbon storage density which was 51.24 t/hm^2. Soft broad - leaved mixed forest plantation＇s carbon storage density was the lowest, which was only 4. 72 t/hm^2.