文献类型：期刊文献

中文题名：川西亚高山岷江冷杉原始林细根生物量、生产力和周转

英文题名：Fine root biomass,productivity and turnover of Abies faxoniana primary forest in subalpine region of western Sichuan,China

作者：刘顺[1] 罗达[1] 杨洪国[1] 史作民[1,2] 刘千里[3] 张利[3] 康英[3] 马青[4]

第一作者：刘顺

机构：[1]中国林业科学研究院森林生态环境与保护研究所,国家林业局森林生态环境重点实验室,北京100091;[2]南京林业大学南方现代林业协同创新中心,江苏南京210037;[3]阿坝州林业科学技术研究所,四川汶川623000;[4]汶川县环境保护和林业局,四川汶川623000

年份：2018

卷号：37

期号：4

起止页码：987-993

中文期刊名：生态学杂志

外文期刊名：Chinese Journal of Ecology

收录：CSTPCD;;Scopus;北大核心:【北大核心2017】；CSCD:【CSCD2017_2018】；

基金：中央级公益性科研院所基本科研业务费专项(CAFYBB2014MA004)和国家重点研发计划项目(2016YFC0502104-02)资助.

语种：中文

中文关键词：细根动态;生产量;细根周转;岷江冷杉原始林

外文关键词：fine root dynamic; production; fine root turnover; Abies faxoniana primary forest.

分类号：Q938.1

摘要：原始林在全球碳收支中具有重要的意义,其细根在地下碳循环过程中发挥着重要作用。本研究采用连续土钻法对川西亚高山岷江冷杉原始林0~30 cm土层细根(≤2 mm)生物量及其季节动态进行了测定,并采用决策矩阵法对细根生产量和周转速率进行了估算。结果表明:岷江冷杉原始林0~30 cm土层活细根生物量和年生产量分别为286.89g·m-2和168.94 g·m-2·a-1,平均细根周转速率为0.56 a-1;细根生物量、生产量和死亡量在生长期内具有明显的动态特征;活细根生物量和生产量总体呈现单峰曲线特征,以9月最大;死细根生物量和死细根/活细根生物量在生长期内总体呈"U型"变化趋势,而死亡量总体呈增加的趋势;土层深度是影响细根动态的重要因素,活细根生物量、死细根生物量、生产量和周转速率随着土层深度的增加呈现下降的变化趋势,而死细根/活细根生物量略有增加。
Primary forests play an important role in the global carbon budget. Fine roots in the forests are an integral component of ecosystem carbon cycling. The seasonal dynamics of fine root （≤2 mm） biomass were investigated by sequential soil coring method from May to November in 0-30 cm soil layer ofAbies faxoniana primary forest in sub-alpine region of western Sichuan. Furthermore, fine root productivity and turnover rate were estimated by decision matrix method. The results showed that living fine root biomass and annual production in 0-30 cm soil layer ofA. faxoniana primary forest were 286.89 g·m-2 and 168.94 g·m-2·a-1, respectively. The average fine root turnover rate was 0.56 a-1. Fine root biomass, productivity and mortality had substantial seasonal variation during the growing season. Living fine root biomass and productivity showed an overall unimodal seasonal trend, peaking in September. Fine root necromass and the ratio of necromass to living biomass of fine root showed a “U” trend, while mortality exhibited an upward trend during the growing season. Soil depth was a significant factor affecting fine root dynamics. Living fine root biomass, fine root necromass, productivity and turnover rate decreased, whereas the ratio of necromass to living fine root biomass slightly increased along soil depth.