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不同林龄木荷-青冈栎混交林幼林碳储量

程彩芳1,陆爱云3,李正才1**,周君刚2,吴亚丛1,赵志霞1,孙娇娇2   

  1. (1中国林业科学研究院亚热带林业研究所, 浙江富阳 311400;  2富阳市林业局, 浙江富阳 311400; 3富阳市林业开发有限
    公司, 浙江富阳 311400)
  • 出版日期:2015-10-10 发布日期:2015-10-10

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

CHENG Cai-fang1, LU Ai-yun3, LI Zheng-cai1**, ZHOU Jun-gang2, WU Ya-cong1, ZHAO Zhi-xia1, SUN Jiao-jiao2   

  1. (1Institute of Subtropical Forestry, Chinese Academy of Forestry, Fuyang 311400, Zhejiang, China; 2Forestry Bureau of Fuyang City, Fuyang 311400, Zhejiang, China; 3Forestory Development Company Limited of Fuyang City, Fuyang 311400, Zhejiang, China)
  • Online:2015-10-10 Published:2015-10-10

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。
 

关键词: 降雨, 生态化学计量, 纬度梯度, 常见草本, 土壤

Abstract: 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 storage 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 significant increment of 5.49 and 23.64 t·hm-2, as compared with shrub (P<0.05). Vegetation carbon storage in 11-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 and 11-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·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.

Key words: latitude gradient, ecological stoichiometry, soil., common herbaceous plant, precipitation