生态学报2018，Vol.38Issue(8)：2838-2845,8.DOI:10.5846/stxb201705150897
赤杨对辽东落叶松人工林土壤氨基糖积累的影响
Effects of N-fixing tree species (Alnus sibirica) on amino sugars in the soils of a Larix kaempferi plantation in eastern Liaoning Province, China
摘要
Abstract
Microbial residues are an important component of soil stable carbon (C) pools.However,their response to Nfixing tree species is still unclear.The present study investigated the effects of alder (Alnus sibirica) on microbial residues (as indicated by amino sugars) in the rhizosphere and non-rhizosphere soils of a larch (Larix kaempferi) plantation in eastern Liaoning Province,China.The contents of individual amino sugars significantly increased in the larch rhizosphere and non-rhizosphere soils in the mixed plantation relative to the pure plantation,indicating that alder benefits microbial residue accumulation.Specifically,the glucosamine (GluN) contents were 99.5％ (P＜0.01) and 154％ (P＜0.01) higher in the larch rhizosphere and non-rhizosphere soils in the mixed plantation than in the pure plantation,respectively,while the muramic acid (MurN) contents in the rhizosphere and non-rhizosphere soils were 66.1％ (P＜0.01) and 132.3％ (P＜0.01) higher in the mixed plantation than in the pure plantation,respectively.We found that alder had no effect on the GluN/MurN ratio,but significantly enriched the amino sugar proportion of soil organic C.Redundancy analysis revealed that total nitrogen was the dominant factor driving changes in amino sugars.This study indicates that alder would significantly stimulate the microbial fixation of C and the stability of soil organic C,which means that it plays a vital role in managing larch plantations.关键词
落叶松/根际/氨基糖/固氮树种Key words
Larix kaempferi/rhizosphere/amino sugars/N-fixing tree species引用本文复制引用
井艳丽,刘世荣,殷有,邓继峰,刘源跃,阎品初,苟堪堪..赤杨对辽东落叶松人工林土壤氨基糖积累的影响[J].生态学报,2018,38(8):2838-2845,8.基金项目
东北低山丘陵区大流域尺度防护林体系景观格局调控技术(2015BAD07B030103) （2015BAD07B030103）
