摘要
根据定位观测数据和有关历史资料，研究了贡嘎山东坡峨眉冷杉（Ａｂｉｅｓｆａｂｒｉ）近熟林和中龄林Ｃ循环。测定了两种林分植物Ｃ储量、土壤有机Ｃ储量、凋落物和立枯量中的Ｃ储量，并对两种林分的净光合速率进行了对照研究。
The carbon cycle ,especially the CO 2 emission and uptake by the middle age and near mature Abies fabri forests was studied in this paper .The forest CO 2 source and sink were emphatically analyzed .Based on the data of located observation on the east slope of Gongga Mountain, the following aspects were investigated in the middle age and near mature Abies fabri forests: the storage of plants carbon , soils organic carbon , litter and dead standing tree carbon, photosynthetic rates of the plants and respiration rates of the plants and soils by CI-301 photosynthesis system. The results show that the total carbon storage of the near mature forest was 320.966 t/hm 2,of which , the storage of plant carbon ,soil organic carbon, litter and dead standing tree carbon accounted for 172.740, 143.152, 1.786 and 3.288 t/hm 2, respectively. The total carbon storage of middle age forest was 98.465 t/hm 2, of which ,the storage of plant carbon, soil organic carbon, litter and dead standing tree carbon accounted for 57.966, 30.698, 1.504 and 8.297 t/hm 2, respectively. CO 2 was released which a rate of 21.749 t/hm 2· a from the soil of the near mature forest. CO 2 was released with a rate of 12.320 t/hm 2· a from the soil of the middle age forest. The results also show that there was an increasing in carbon storage of the middle age and near mature forests from atmospheric CO 2.The main factor which affected soil respiration was temperature.Finally ,the uncertainties in the estimations were discussed in detail and further works were also suggested.
出处
《山地学报》
CSCD
1999年第3期251-254,共4页
Mountain Research
基金
中国科学院"九五"重大项目
关键词
贡嗄山
峨眉冷杉林
碳循环
碳储量
冷杉林
Gongga Mountain, Abies fabri forest, carbon cycle, carbon storage
