Chin J Plant Ecol ›› 2022, Vol. 46 ›› Issue (2): 220-231.DOI: 10.17521/cjpe.2021.0098

Special Issue: 菌根真菌

• Research Articles • Previous Articles     Next Articles

Effects of nitrogen addition on phosphorus transformation and decomposition fungi in seedling stage of Cunninghamia lanceolata

XIE Huan1, ZHANG Qiu-Fang2, ZENG Quan-Xin1, ZHOU Jia-Cong1, MA Ya-Pei1, WU Yue1, LIU Yuan-Yuan1, LIN Hui-Ying1, YIN Yun-Feng1, CHEN Yue-Min1,*()   

  1. 1School of Geographical Science, State Key Laboratory of Subtropical Mountain Ecology, Fujian Normal University, Fuzhou 350007, China
    2College of Urban and Environmental Sciences, Peking University, Beijing 100871, China
  • Received:2021-03-18 Accepted:2021-05-27 Online:2022-02-20 Published:2021-07-22
  • Contact: CHEN Yue-Min
  • Supported by:
    Natural Science Foundation of Fujian Province(2020J01142);Natural Science Foundation of Fujian Province(2020J01397)


Aims The increasing deposition of nitrogen (N) has led to an imbalance of N and phosphorus (P) in forest soils, and has become the focus of ecological studies. Fungi, as one of the main microorganisms in soils, plays an important role in maintaining nutrient balance and promoting plant growth. Enhancing the understanding of the growth status of Cunninghamia lanceolata seedlings and the changes of soil fungal community structure and functional groups under the treatments of N addition, are helpful to study the process of soil nutrient cycling, and provide references for scientific management and sustainable development of C. lanceolata plantation.

Methods In this study, we used high-throughput sequencing and FUNGuild functional prediction to determine changes in soil fungal structural composition and functional groups of C. lanceolatain response to the application of control (0 kg N·hm-2·a-1), low N (40 kg N·hm-2·a-1), and high N (80 kg·N hm-2·a-1) treatments.

Important findings The results showed that N addition reduced biomass and leaf P content of C. lanceolata seedlings. Ascomycota, Basidiomycota, and Mortierellomycota were the three dominant phyla in the experimental soils, and accounted for 76.71%-86.72% of the relative abundance among the entire fungal community. The effect of short-term N addition on fungal composition was not significant at the phylum level. However, the relative abundance of Glomeromycota increased significantly with the low N treatment. At the order level, compared with the control, low N treatment significantly increased the relative abundance of Mortierellales. High N treatment significantly increased the relative abundance of Tremellales, but significantly reduced that of Sordariales. In addition, low N treatment significantly increased soil available P content, and there were significant positive correlations with the relative abundances of Glomeromycota and Mortierellales. These results indicate that N addition may maintain P availability of C. lanceolatagrowth by altering the fungi associated with P transformation. In addition, the relative abundance of saprotroph group was significantly reduced under low N treatment, but the relative abundance of arbuscular mycorrhizal fungi was significantly increased. In conclusion, soil fungal functional groups can participate in soil nutrient cycling by changing the relative abundance of different functional groups.

Key words: nitrogen deposition, fungi, FUNGuild functional prediction, phosphorus transformation, decomposition, Cunninghamia lanceolata