大兴安岭林区兴安落叶松人工林土壤有机碳贮量  

Soil organic carbon storage in different aged Larix gmelinii plantations in Great Xing'an Mountains of Northeast China

作　　者：齐光[1,2] 王庆礼[1] 王新闯[1] 于大炮[1] 周莉[1] 周旺明[1] 彭舜磊[2] 代力民[1] 

机构地区：[1]中国科学院沈阳应用生态研究所森林与土壤生态国家重点实验室,沈阳110164 [2]平顶山学院,河南平顶山467000

出　　处：《应用生态学报》2013年第1期10-16,共7页Chinese Journal of Applied Ecology

基　　金：中国科学院战略性先导科技专项(XDA05060200);中国科学院知识创新工程项目(KZCX2-YW-Q1-0501);河南省教育厅科学技术研究重点项目(12B180024);平顶山学院博士启动项目(2011009/G)资助

摘　　要：通过样地调查,研究了大兴安岭林区10、15、26和61年生兴安落叶松人工林0～40cm土壤有机碳(SOC)贮量,以及原始兴安落叶松林皆伐后营造人工林过程中SOC碳源/汇的变化.结果表明:随林龄的增加,兴安落叶松人工林SOC贮量呈现先减少后增加的趋势,转折点在林龄15～26a.与原始落叶松林相比,兴安落叶松人工林土壤碳库初期(10～26a)表现为碳源,之后逐渐转变为碳汇,林龄61a时SOC贮量达158.91t·hm-2.兴安落叶松人工林土壤碳库的垂直分布表现为初期下层SOC贮量高于上层,26a后上层高于下层,说明人为干扰对该地区森林土壤碳库垂直分布产生了强烈的影响.大兴安岭林区兴安落叶松人工林的主伐年龄以>60a为宜.A sampling plot investigation was conducted to study the soil organic carbon （SOC） storage in 0-40 cm layer in 10-, 15-, 26- and 61 years old Larix gmelinii plantations in Great Xing＇ an Mountains of Northeast China as well as the temporal variation pattern of the SOC source/sink during the plantation management after the clear cutting of primary L. gmelinii forest. With the increasing age of the plantations, the SOC storage increased after an initial decrease, and the inflection point was at a stand age between 15- and 26-years old. Compared with that of primary forest, the SOC storage of the plantations played a role of carbon source at early stage （ 10-26 years old）, but gradually transformed into carbon sink then, with a SOC storage of 158.91 t · hm^-2 in 61-year- old plantation. The SOC storage of the plantations increased with soil depth initially, but was higher in upper soil layer than in deeper soil layer after the stand age being 26, which implied that human disturbance had strong effects on the vertical distribution of SOC. It was considered that the appro- priate cutting age for the L. gmelinii plantations in Great Xing＇ an Mountains could be at least 60 years old.

关 键 词：大兴安岭 兴安落叶松 土壤有机碳 碳密度 碳汇 人工林经营 

分 类 号：S791.22[农业科学—林木遗传育种]