文献类型：期刊文献

英文题名：Inconsistent responses of soil microbial community structure and enzyme activity to nitrogen and phosphorus additions in two tropical forests

作者：Ma, Suhui[1] Chen, Guoping[1] Tang, Wenguang[2] Xing, Aijun[3] Chen, Xiao[1] Xiao, Wen[1] Zhou, Luhong[1] Zhu, Jiangling[1] Li, Yide[4] Zhu, Biao[1] Fang, Jingyun[1]

第一作者：Ma, Suhui

通信作者：Fang, JY[1]

机构：[1]Peking Univ, Minist Educ, Key Lab Earth Surface Proc, Inst Ecol,Coll Urban & Environm Sci, Beijing 100871, Peoples R China;[2]Univ Leeds, Sch Geog, Leeds LS2 9JT, W Yorkshire, England;[3]Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, Beijing 100093, Peoples R China;[4]Chinese Acad Forestry, Res Inst Trop Forestry, Jianfengling Natl Key Field Observat & Res Stn Fo, Guangzhou 510520, Peoples R China

年份：2021

卷号：460

期号：1-2

起止页码：453-468

外文期刊名：PLANT AND SOIL

收录：;Scopus(收录号：2-s2.0-85099484283);WOS:【SCI-EXPANDED(收录号:WOS:000607756800002)】；

基金：This work was supported by the National Natural Science Foundation of China (31988102), the National Key Research and Development Program of China (2017YFC0503906) and the China Postdoctoral Science Foundation (2018M631247). We thank Anwar Eziz, Xin Jing and Zeyuan Li for their helpful suggestions for data analyses and a friendly review of the manuscript. We also thank the anonymous reviewers and the handling editor for their constructive comments that improved this manuscript. The authors declare that they have no conflict of interest.

语种：英文

外文关键词：Tropical forests; Nitrogen addition; Phosphorus addition; Phospholipid fatty acids; Enzyme activity; Microbial nutrient limitation

摘要：Aims Soil microorganisms play an important role in biogeochemical cycles in terrestrial ecosystems. Increasing nitrogen (N) and phosphorus (P) deposition are likely to regulate microbial growth by altering soil nutrient availability in tropical forests, yet their impacts on microbial community structure and function between primary forests and secondary forests are not well understood. Methods To investigate how nutrient availability affects microbial community structure and function in tropical forests, we measured soil phospholipid fatty acids and enzyme activities in a seven-year N and P fertilization experiment in two tropical montane rainforests, China. Results In N addition plots, fungal biomass, arbuscular mycorrhizal fungal biomass and fungi to bacteria ratio (F/B) decreased in the secondary forest, but had moderate changes in the primary forest. In P and N plus P addition plots, microbial biomass showed minor changes, but the F/B increased significantly in both forests. However, hydrolytic enzyme activities did not show a significant change in the secondary forest, while they decreased significantly in the primary forest. Microbial P limitation in the primary forest decreased under P addition and N plus P addition. Conclusions Our findings suggest inconsistent responses of microbial community structure and enzyme activity to N and P additions in tropical soils depending on forest type.