生态学杂志2018，Vol.37Issue(4)：987-993,7.DOI:10.13292/j.1000-4890.201804.022
川西亚高山岷江冷杉原始林细根生物量、生产力和周转
Fine root biomass, productivity and turnover of Abies faxoniana primary forest in subalpine region of western Sichuan, China
摘要
Abstract
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.关键词
细根动态/生产量/细根周转/岷江冷杉原始林Key words
fine root dynamic/production/fine root turnover/Abies faxoniana primary forest引用本文复制引用
刘顺,罗达,杨洪国,史作民,刘千里,张利,康英,马青..川西亚高山岷江冷杉原始林细根生物量、生产力和周转[J].生态学杂志,2018,37(4):987-993,7.基金项目
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. （CAFYBB2014MA004）
