北京林业大学学报2018，Vol.40Issue(1)：37-45,9.DOI:10.13332/j.1000-1522.20170186
赣南马尾松天然林不同生长阶段碳密度分布特征
Distribution characteristics of carbon density of natural Pinus massoniana forest at different stand growing stages in southern Jiangxi Province,eastern China
摘要
Abstract
[Objective] To analyze the carbon density of natural Pinus massoniana in southern Jiangxi Province of eastern China was to provide references for accurate estimation of forest carbon stocks in regional scale, and to develop scientific management of carbon sequestration forest. [Method] Based on the investigation of standard plots and the determination of carbon content , the distribution characteristics of carbon density of different stand ages, layers and components were analyzed by one-way ANOVA and LSD multiple comparison methods. [Result] (1) the total carbon density of stand was 129. 00 t/ ha. The carbon density of different age groups ranked as mature forest (185. 41 t/ ha) > near-mature forest (140. 54 t/ ha) > middle-aged forest (114. 21 t/ ha) > young forest (75. 83 t/ ha). The carbon density of different layers followed a sequence of soil layer (80. 02 t/ ha) > arbor layer (43. 81 t/ ha) > understory vegetation layer (4. 60 t/ ha) > litter layer (0. 57 t/ ha), accounted for 62. 03％ , 33. 96％ , 3. 57％ and 0. 44％ of total carbon density, respectively. The distribution law of carbon density in different layers performed as follows: the arbor layer was trunk > branch > tree root > tree leaf, the understory vegetation layer was herb layer > shrub layer, the litter layer was half-decomposed layer > undecomposed layer, the carbon density of unit thickness at each soil layer decreased with the increase of soil depth. (2) The variation law of carbon density in different layers differed with the increase of stand age. The carbon density of arbor and soil layer increased along forest development, and in mature forest was the largest. The carbon density of different components of arbor layer in mature forest was significantly higher than in other age groups (P < 0. 05), but there were significant differences in the carbon density of soil layer among different age groups ( P < 0. 05). The carbon density of understory vegetation layer decreased firstly and then increased with the increase of stand age, but in young forest was the largest. There were significant differences in the carbon density of shrub layer, herb layer and their components among different age groups (P < 0. 05), the largest carbon density of shrub and herb layers was respectively in near-mature forest and mature forest. The carbon density of litter layer increased firstly and then decreased with the increase of stand age, the carbon density of undecomposed layer in near-mature forest was significantly higher than in other age groups (P < 0. 05), and there were no significant differences in the carbon density of half-decomposed layer among different age groups (P > 0. 05). [Conclusion] The majority of carbon density of the natural Pinus massoniana ecosystem was stored in the arbor layer and soil layer. The carbon density of arbor layer and its components, and soil layer increased along forest development, but the changes in carbon density of understory vegetation layer, litter layer and their components did not display such a pattern.关键词
马尾松/天然林/碳密度/分布特征Key words
Pinus massoniana/natural forest/carbon density/distribution characteristics分类
农业科技引用本文复制引用
郭丽玲,潘萍,欧阳勋志,宁金魁,臧颢,刘苑秋,杨阳,桂亚可..赣南马尾松天然林不同生长阶段碳密度分布特征[J].北京林业大学学报,2018,40(1):37-45,9.基金项目
国家自然科学基金项目(31360181),中国科学院战略性先导科技专题(XDA05050205). （31360181）
