演替和气候对阔叶红松林土壤有机碳密度的影响

发布时间：2017-12-31 10:32

本文关键词：演替和气候对阔叶红松林土壤有机碳密度的影响　出处：《北京林业大学学报》2016年07期 　论文类型：期刊论文

【摘要】：东北阔叶红松林及其次生林是我国重要的森林碳库,土壤中储存着大量的有机碳。本研究调查了纬度梯度上的4个典型地点(长白山、蛟河、五营和胜山)不同演替阶段(杨桦林、硬阔叶林、红松近熟林和成熟林)的土壤有机碳密度(SOCD),并分析了总SOCD(0~60 cm)、表土层SOCD(0~20 cm)与演替、气候等因素的关系。结果表明:各研究地点的总SOCD、表土层SOCD和表土层占总SOCD的比例随演替的进展并没有一致的变化趋势。总SOCD与纬度、最冷月均温、年降水量和温暖指数无显著关系;表土层SOCD、表土层/总SOCD比例随纬度增加而显著降低,随最冷月均温升高而显著上升。多元分析表明,气候因子本身对表土层SOCD的解释力高于对总SOCD的解释力,演替阶段对3个SOCD变量的解释力均不显著,但演替阶段与温度指标(最冷月均温或温暖指数)的交互作用对总SOCD和表土层/总SOCD比例影响显著。此外,坡位对总SOCD和表层SOCD都有显著影响。研究表明,表土层SOCD可能主要受气候梯度和小地形影响;总SOCD的异质性较强、影响因素复杂,气候因子自身对总SOCD的影响较弱,群落特征(生活型、蓄积量)和小地形、以及演替与气候的交互作用对总SOCD的影响显著。
[Abstract]:In broad leaved Korean pine forest and secondary forest is an important forest carbon pool, soil organic carbon storage in large quantities. The study investigated 4 typical sites on the latitudinal gradient (Changbai Mountain, Jiaohe, and five Sheng Shan) at different successional stages (Yang Hualin, pine and hardwood forests, near mature forest and mature forest) the soil organic carbon density (SOCD), and the analysis of the total SOCD (0~60 cm), SOCD soil layer (0~20 cm) and the relationship between succession, climate and other factors. The results showed that the total SOCD of the study sites, SOCD soil layer and soil layer accounted for the proportion of total SOCD with succession progress did not change trend consistent. Total SOCD and latitude, average temperature of the coldest month, there was no significant relationship between the annual precipitation and warmth index; SOCD soil layer, soil layer / total SOCD ratio decreased significantly with increasing latitude, and increased significantly with the average temperature of the coldest month increased. Multivariate analysis showed that the climate factor itself surface soil SOCD Explain the explanatory power of SOCD is higher than that of the total, explain the succession stages of the 3 SOCD variables are not significant, but the succession stage and temperature index (average temperature of the coldest month or the warmth index) a significant interaction effect on total SOCD and soil / total SOCD ratio. In addition, the slope position has a significant impact on the total SOCD and SOCD surface. The study shows that the SOCD soil layer was mainly affected by the climate and terrain gradient effect; total SOCD heterogeneity, complex factors, climatic factors and their impact on the total SOCD is weak, the community characteristics (life, volume) and small topography, and the influence of the interaction on Succession and climate the total SOCD significantly.

【作者单位】：北京林业大学森林资源与生态系统过程北京市重点实验室;
【基金】：国家自然科学基金项目(31370620)
【分类号】：S714.2
【正文快照】： GUO Xin;WU Peng;HAN Wei;LI Qiao-yan;YANG Lei;AN Hai-long;WANG Xiang-ping.Theinfluence of succession stages and climate on soil organic carbon density of broad-leaved Koreanpine forest.Journal of Beijing Forestry University(2016)38(7)55-63[Ch,40 ref.]Key

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