摘要
基于野外调查和实验室仪器分析数据，研究了秦岭天然油松林生物量、碳密度、碳储量的空间分布及其随龄级、海拔变化的规律．结果表明：碳在油松各器官中的分配以树干所占比例最大，其次为树枝，树皮最小；不同器官生物量碳密度在0．4916～0．5298之间波动，由大到小顺序为：皮，叶，枝，干，根；油松林生态系统的生物量碳密度为183．26t／hm^2，其中土壤层（0～60cm）约占2／3，植被层约占1／3；油松林生态系统的生物量碳密度在海拔1700～1800m最大，达196．53t／hm^2，海拔低于1500m和超过1900m，都较小，分别为173．80t／hm^2和169．31t／hm^2；5个龄级的天然油松林的生物量碳密度以平均树龄20a为最小，50a为最大．
Based on data in a field investigation and laboratory analysis, the spatial distribution and temporal variations of biomass carbon density （BCD） in Pinus tabulae formis forest ecosystem in the Qinling Mountains were studied. According to measurement data and analysis, the following basic conclusions were drawn. Distribution of carbon was 47.91% for the trunk, 22.80% for the branches and 6.20% for the bark, and BCD of different Pinus tabulae formis organs ranged from 0. 491 6 to 0. 529 8, in the order of bark 〉 leaf 〉 branch 〉 trunk 〉 root. Total BCD in the P. tabulaeforrnis ecosystem was 183.26 t/hm^2, of which about 1/3 was stored in the plant （including root） and 2/3 in the soil. The highest BCD value, 196.53 t/ha, occurred at the elevation from 1 700 m to 1 800 m; the BCD value was 173.80 t/ha for an elevation of （ 1 500 m and 169.31 t/ha for an elevation of ） 1 900 m. Of the 5 age classes studied, the class of 50 a had the highest BCD values and the class of 20a had the lowest.
出处
《西南大学学报（自然科学版）》
CAS
CSCD
北大核心
2009年第3期114-118,共5页
Journal of Southwest University(Natural Science Edition)
基金
“林业生态工程生态效益监测与碳汇计量技术”子专题-秦岭森林生态站及其所在省区森林生态质量状况评估技术(2006BAD03A0702)
关键词
油松林
生物量碳密度
秦岭
Pinus tabulaeformis
biomass carbon density
the Qinling Mountains
