不同林龄木荷-青冈栎混交林幼林碳储量  

Carbon storage in mixed Schima superba Gardn. et Champ.-Cyclobalanpsis glauca(Thunb.) Oerst. young plantations at different stand ages

作　　者：程彩芳[1] 陆爱云 李正才[1] 周君刚 吴亚丛[1] 赵志霞[1] 孙娇娇 

机构地区：[1]中国林业科学研究院亚热带林业研究所,浙江富阳311400 [2]富阳市林业开发有限公司,浙江富阳311400 [3]富阳市林业局,浙江富阳311400

出　　处：《生态学杂志》2015年第10期2705-2710,共6页Chinese Journal of Ecology

基　　金：浙江省重点科技创新团队项目(2010R50030);浙江省自然科学基金项目(LY12C03012)资助

摘　　要：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。Seven- and 11-year-old mixed Schima superba Gardn. et Champ. - Cyclobalanpsis glauca （Thunb.） Oerst. plantations （SC） transformed from shrub, and the reserved shrub were chosen to study their dynamic changes in carbon storage. The results showed that the carbon stor- age in the three types of vegetation and in the soils followed the ascending order of shrub 〈 7- year-old SC 〈 11-year-old SC. The vegetation carbon storage in 7- and 11-year-old SC had signif- icant increment of 5.49 and 23.64 t . hm-2, as compared with shrub （P〈0.05）. Vegetation car- bon storage in 1 1-year-old SC was 18.15 t . hm-2 larger than that in 7-year-old SC. Soil carbon storage in 7- and 11-year-old SC was 12.56 and 30.99 t . hm-2, being much higher than that in shrub soil. Soil carbon storage in 11-year-old SC was 18.43 t. hm-2 more than that in 7-year-old SC, with significant difference in each soil layer of 0-50 cm depth. The total ecosystem carbon storage of shrub, 7- and11-year old SC was 54.11, 72.16 and 108.74 t. hm-2, respectively. The annual increment of total carbon storage in 7- and 11-year-old SC was 2.58 and 4.97 t . hm-2 -1 . a-1 compared with shrub, respectively. The carbon storage of evergreen broad-leaved young plantations transformed from shrub has increased significantly; however, long-term effect of stand age on carbon accumulation needs to be further studied.

关 键 词：木荷-青冈栎混交林 碳储量 碳含量 林龄 

分 类 号：S718.5[农业科学—林学]