应用生态学报2017，Vol.28Issue(11)：3461-3468,8.DOI:10.13287/j.1001-9332.201711.004
扁刺栲不同根序细根形态和化学特征及其对短期氮添加的响应
Fine root morphology and chemistry characteristics in different branch orders of Castanopsis platyacantha and their responses to nitrogen addition
摘要
Abstract
Fine root morphology and chemistry characteristics of dominant species Castanopsis platyacantha in an evergreen broad-leaved forest in subtropical China and their response to nitrogen (N) addition were determined in order 1st to 5th.With the increase of root order,C.platyacantha root diameter,tissue density (RTD),and K content increased,and specific root length (SRL),specific surface area (SRA) and contents of N,P and Mg decreased.Nitrogen addition significant increased N content and decreased Mg content and C/N of fine roots.Root tissue Ca content had a decrease trend under N addition treatments.There were neither significant effects on the contents of C,P,K,Na,Al,Mn,Fe of fine roots,nor on fine root diameter,SRL,SRA and RTD.Root P content had a significant liner relationship with root morphology in the all treatments.Nitrogen addition changed the linear relationships between tissue Mg content and root morphology from no significant relationship to significant relationship,and linear relationships between tissue N content and root morphology from significant relationship to no significant relationship.N addition would affect the root tissue nutrient contents and could enhance P and Mg requirement of plants.关键词
根序/根形态/根化学/氮沉降/扁刺栲Key words
root branch order/root morphology/root chemistry/nitrogen deposition/Castanopsis platyacantha引用本文复制引用
陈冠陶,郑军,彭天驰,李顺,邱细容,陈雨芩,马豪宇,涂利华..扁刺栲不同根序细根形态和化学特征及其对短期氮添加的响应[J].应用生态学报,2017,28(11):3461-3468,8.基金项目
本文由国家自然基金项目(31300522)资助 This work was supported by the National Natural Science Foundation of China (31300522). （31300522）
