土壤2023，Vol.55Issue(6)：1251-1260,10.DOI:10.13758/j.cnki.tr.2023.06.012
降水变化和氮沉降对荒漠草原土壤丛枝菌根真菌群落结构的影响
Effects of Precipitation Change and Nitrogen Deposition on Soil Arbuscular Mycorrhizal Fungi(AMF)Community Structure in Desert Steppe
摘要
Abstract
A twelve-treatment experiment with the main plot(three water treatments:30%increase(W),30%reduction(R),and natural rainfall(CK)and split-plot(4 nitrogen gradients:0(N0),30(N30),50(N50)and 100(N100)kg/(hm2·a)was designed in Stipa breviflora desert steppe to investigate the diversity and composition of arbuscular mycorrhizal fungi(AMF)community in soil by high-throughput sequencing.The results showed that increased moisture content promoted but nitrogen addition inhibited alpha diversity of AMF.The interaction between water increase and nitrogen addition promoted alpha diversity of AMF and changed the composition of AMF communities.Water increase increased aboveground biomass of various plants,nitrogen addition significantly increased the biomass of perennial weeds,semi-shrub and undershrub,but significantly reduced the biomass of perennial grasses.In addition,the relative abundance of Diversisporaceae was significantly and positively correlated with the biomass of biennial plants,semi-shrub and undershrub.The biomass of biennial plants,semi-shrub and undershrub increased with nitrogen addition and rainfall enhancement.This study demonstrates the stability of AMF community structure under short-term climate change.In addition,the correlation between the abundance of AMF and the biomass of various life forms of vegetation proves that AMF has strong connectivity with vegetation in ecosystems with relatively scarce nutrient resources.关键词
降水变化/氮沉降/荒漠草原/丛枝菌根/群落结构Key words
Precipitation change/Nitrogen deposition/Desert steppe/Arbuscular mycorrhizal/Community structure分类
农业科学引用本文复制引用
图纳热,红梅,叶贺,张耀宗,贺世龙,张雅玲,赵宇,呼吉亚..降水变化和氮沉降对荒漠草原土壤丛枝菌根真菌群落结构的影响[J].土壤,2023,55(6):1251-1260,10.基金项目
国家自然科学基金项目(31860136)资助. （31860136）
