热带亚热带植物学报2024，Vol.32Issue(5)：620-628,9.DOI:10.11926/jtsb.4803
杉木和米槠人工林细根形态对短期氮和磷添加的可塑性响应
Plasticity Response of Fine Root Morphological Traits to Short-term Nitrogen and Phosphorus Addition in Subtropical Cunninghamia lanceolata and Castanopsis carleisii Plantations
摘要
Abstract
Taking similar age arbuscular mycorrhiza(AM)species Cunninghamia lanceolata and ectotrophic mycorrhiza(EM)species Castanopsis carlesii in Sanming,Fujian Province as the research objects,the effects of nitrogen and phosphorus addition on morphological characteristics of fine roots of different mycorrhizal species were studied.The results showed that the diameter and root tissue density of fine roots of Cunninghamia lanceolata had significantly positive N and P plasticity response,and the specific root length and specific surface area had negative plasticity response,while the morphological traits of fine roots of Castanopsis carlesii showed opposite plasticity response.The P plasticity response of fine root morphological traits of Cunninghamia lanceolata was stronger than that of Castanopsis carlesii,but there was no significant difference between N and P plastic responses of fine root morphological traits of Castanopsis carlesii.The direction of plasticity response of the same morphological trait of fine root to N and P was the same,and there was a positive correlation.There was synergistic and tradeoff relationship between nutrient plasticity responses of different morphological characters in fine roots.Therefore,AM species Cunninghamia lanceolata adopted the resource conservation strategy to prolong the fine rootlife,while the EM species Castanopsis carlesii adopted the resource acquisition strategy to occupy resources quickly.In addition,the fine roots of AM species Cunninghamia lanceolata and the EM species Castanopsis carlesii might have the same foraging trend to N and P addition,and morphological traits of AM species Cunninghamia lanceolata fine roots were more sensitive to P addition than EM species Castanopsis carlesii.关键词
氮和磷添加/菌根类型/细根形态/可塑性响应Key words
N and P addition/Mycorrhizal type/Fine root morphology/Plasticity response引用本文复制引用
郑子艺,姜琦,贾林巧,陈光水..杉木和米槠人工林细根形态对短期氮和磷添加的可塑性响应[J].热带亚热带植物学报,2024,32(5):620-628,9.基金项目
国家重点研发计划项目(2021YFD220040303)资助This work was supported by the National Key Research and Development Program of China(Grant No.2021YFD220040303). （2021YFD220040303）
