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Article

Phosphorus Reduces Negative Effects of Nitrogen Addition on Soil Microbial Communities and Functions

by 1,†, 1,2,†, 1,2, 1,2, 1, 1, 1,* and 1,3
1
CAS Key Laboratory of Forest Ecology and Management, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China
2
University of Chinese Academy of Sciences, Beijing 100049, China
3
Key Laboratory of Geographical Processes and Ecological Security in Changbai Mountains, Ministry of Education, School of Geographical Sciences, Northeast Normal University, Changchun 130024, China
*
Author to whom correspondence should be addressed.
These authors contributed equally to this work.
Microorganisms 2020, 8(11), 1828; https://doi.org/10.3390/microorganisms8111828
Received: 19 October 2020 / Revised: 10 November 2020 / Accepted: 17 November 2020 / Published: 20 November 2020
(This article belongs to the Special Issue Microbial Community Response to Climate and Environmental Changes)
Increased soil nitrogen (N) from atmospheric N deposition could change microbial communities and functions. However, the underlying mechanisms and whether soil phosphorus (P) status are responsible for these changes still have not been well explained. Here, we investigated the effects of N and P additions on soil bacterial and fungal communities and predicted their functional compositions in a temperate forest. We found that N addition significantly decreased soil bacterial diversity in the organic (O) horizon, but tended to increase bacterial diversity in the mineral (A) horizon soil. P addition alone did not significantly change soil bacterial diversity but mitigated the negative effect of N addition on bacterial diversity in the O horizon. Neither N addition nor P addition significantly influenced soil fungal diversity. Changes in soil microbial community composition under N and P additions were mainly due to the shifts in soil pH and NO3 contents. N addition can affect bacterial functional potentials, such as ureolysis, N fixation, respiration, decomposition of organic matter processes, and fungal guilds, such as pathogen, saprotroph, and mycorrhizal fungi, by which more C probably was lost in O horizon soil under increased N deposition. However, P addition can alleviate or switch the effects of increased N deposition on the microbial functional potentials in O horizon soil and may even be a benefit for more C sequestration in A horizon soil. Our results highlight the different responses of microorganisms to N and P additions between O and A horizons and provides an important insight for predicting the changes in forest C storage status under increasing N deposition in the future. View Full-Text
Keywords: nitrogen deposition; phosphorus addition; microbial community; functional potential; temperate forest; high throughput sequencing nitrogen deposition; phosphorus addition; microbial community; functional potential; temperate forest; high throughput sequencing
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MDPI and ACS Style

Xia, Z.; Yang, J.; Sang, C.; Wang, X.; Sun, L.; Jiang, P.; Wang, C.; Bai, E. Phosphorus Reduces Negative Effects of Nitrogen Addition on Soil Microbial Communities and Functions. Microorganisms 2020, 8, 1828. https://doi.org/10.3390/microorganisms8111828

AMA Style

Xia Z, Yang J, Sang C, Wang X, Sun L, Jiang P, Wang C, Bai E. Phosphorus Reduces Negative Effects of Nitrogen Addition on Soil Microbial Communities and Functions. Microorganisms. 2020; 8(11):1828. https://doi.org/10.3390/microorganisms8111828

Chicago/Turabian Style

Xia, Zongwei, Jingyi Yang, Changpeng Sang, Xu Wang, Lifei Sun, Ping Jiang, Chao Wang, and Edith Bai. 2020. "Phosphorus Reduces Negative Effects of Nitrogen Addition on Soil Microbial Communities and Functions" Microorganisms 8, no. 11: 1828. https://doi.org/10.3390/microorganisms8111828

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