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以我国北亚热带地区由灌木林人工改造而来的7、11年生木荷(Schima superba Gardn.et Champ.)-青冈栎(Cyclobalanpsis glauca(Thunb.)Oerst.)混交林为对象,研究幼林期林龄对林分生态系统碳储量的影响。结果表明:1)各林分植被、土壤碳储量均表现为灌木林<7年生木荷-青冈栎林<11年生木荷-青冈栎林,7年生和11年生木荷-青冈栎林植被碳储量分别比灌木林增加了5.49和23.64 t·hm-2,差异达到显著水平(P<0.05),11年生木荷-青冈栎林的植被碳储量比7年生多积累18.15 t·hm-2。7年生和11年生木荷-青冈栎林土壤有机碳储量分别比灌木林增加了12.56和30.99 t·hm-2,差异均达到显著水平;11年生木荷-青冈栎林土壤有机碳储量比7年生多18.43 t·hm-2,且各土层碳储量均有显著增加;2)3种林分生态系统碳储量分别为54.11、72.16和108.74 t·hm-2,相比灌木林,7年生和11年生木荷-青冈栎林碳储量年均增长量分别为2.58和4.97 t·hm-2·a-1;灌木林改造为常绿阔叶人工林,林分碳储量在幼林期已有显著增加,随着林龄增长,人工林碳储量的积累还有待进一步研究。
The mixed forest of Schima superba Gardn.et Champ. - Cyclobalanpsis glauca (Thunb.) Oerst. From the shrubs in the northern subtropics of China was used as a study object to study the effects of young forest Effect of Age on Carbon Storage in Forest Ecosystem. The results showed as follows: 1) The vegetation and soil carbon storage of all stands showed the following characteristics: shrub <7 years Schima superba - Cyclobalanopsis glauca forest <11 years Schima superba - Quercus glauca forest, 7 years old and 11 years old Schima superba - (P <0.05). The biomass of plant in the 11-year-old Cyclobalanopsis glauca forest was 18.15 t · hm-2 more than that of 7-year-old forest. The soil organic carbon storage in the 7-year-old and 11-year-old Schima superba-Cyclobalanopsis glauca forest increased by 12.56 and 30.99 t · hm-2, respectively, reaching significant levels. The soil organic carbon storage in the 11- The annual carbon storage was 18.43 t · hm-2, and the carbon storage of each soil layer increased significantly. 2) The carbon storage of the three ecosystems was 54.11, 72.16 and 108.74 t · hm-2, respectively, And that of the 11-year-old Schima superba-Cyclobalanopsis glauca forest were 2.58 and 4.97 t · hm-2 · a-1, respectively. The shrubbery was transformed into evergreen broad-leaved plantation, Significantly increased, with the increasing age, the accumulation of plantation carbon storage needs further study.