不同林龄阶段的松栎混交人工林碳储量研究  

Study on Carbon Storage of A Mixed Pine-oak Plantation Based on Different Ages

作　　者：崔秋芳[1] 赵佳宝[1] 陈家林[1] 郭二辉[1] 杨喜田[1] 

机构地区：[1]河南农业大学林学院,河南郑州450002

出　　处：《生态环境学报》2015年第12期1944-1949,共6页Ecology and Environmental Sciences

基　　金：国家自然科学基金项目(31170580)

摘　　要：以不同林龄的马尾松-麻栎(Pinus massoniana-Quercus acutissima)人工林为研究对象,为尽可能减少样木法测定生物量对森林资源的破坏,采取估算和实验测定相结合的方法,探讨了不同生长发育阶段生态系统碳储量的时空变化规律。结果表明:人工混交林生态系统碳储量随着林龄的增加而增加,且主要分布在乔木层和土壤层。随着林龄的增大,乔木层碳储量增加,马尾松碳储量占乔木层的比重呈先增加后降低趋势,20年生所占比重最大,可达61.53%,而麻栎则相反,35年生麻栎碳储量高达80.30 t·hm^(-2),占比重的55.33%,二者生长呈现互补趋势;灌木层和枯落物层碳储量随着林龄的增大呈现"n"型,20年生达到最高值,分别为13.00和1.87 t·hm^(-2);8年生林龄的草本层碳储量最大,为0.15 t·hm^(-2),随着林龄的增加而减小;土壤有机碳储量随着林龄的增大而增加,同一林龄土壤机碳碳储量在垂直分布上表现为随着土壤深度的增加,碳储量减少,有机碳碳储量主要集中在0~20 cm的土层。植被层碳储量的空间分布序列是:乔木层>灌木层>枯落物层>草本层,混交林生态系统碳储量分布情况为8~20年生林碳储量分布一致:土壤>乔木>灌木>枯落物>草本,25~35年生分布一致:乔木>土壤>灌木>枯落物>草本。该研究认为马尾松-麻栎人工林生态系统碳储量随林龄增加的变化规律明显,碳汇潜力巨大,为该区人工碳汇林业的经营提供了依据。In this paper,Pinus massoniana and Quercus acutissima mixed plantation ranging from 8 to 35 years in representative are selected as the research object.The paper mainly discussed temporal-spatial pattern of community biomass and carbon storage in different stand structures,(e.g.the tree,the shrub,the herb and the stand) and different age group,adopting estimates and experiment ways to minimize the destruction of standard tree method of biomass to the forest resources.The results showed that the ecological system carbon storage in mixed plantations increased continually with the ages increasing,mainly distributed in the tree layer and soil layer.The carbon storage percentage of P.massoniana increased first and then decreased with the increasing of age,20 years accounted for the largest,reached 61.53%,while Q.acutissima is just the opposite,carbon storage of 35 year-old Q.acutissima reached up to 80.30 t·hm^(-2) and accounted for 55.33%,Showing a trend of growth complementary between them.With the increasing of stand age,the carbon storage of shrub layer and litter layer showed 'n' type,peaked at 20 years were 13.00 and 1.87 t·hm^(-2),but herb layer reduced,peaked at 8 years was 0.15 t·hm^(-2).To the soil layer,Organic Carbon storage increased with the increasing of age and focused on 0~20 cm and decreased with soil depth in same aged plantation.Carbon storage in vegetable layer was in sequence of arbor,shrub,liter,herb.Carbon storage in mixed plantations ecological system in 8~20 years was in the same sequence of soil>tree>shrub>litter>herb,while in 25~35 years was tree>soil>shrub>litter>herb.In conclusion,our study shows that carbon storage and distribution patterns in P.massoniana and Q.acutissima mixed plantation expressed obvious dynamic variations with stand age and had huge carbon storage potential in the future.It can facilitate the management of the forest as a carbon sink.

关 键 词：人工混交林 林龄 时空变化 碳储量 

分 类 号：S718.55[农业科学—林学] X171.1[环境科学与工程—环境科学]