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iForest - Biogeosciences and Forestry

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Effects of arbuscular mycorrhizal fungi on microbial activity and nutrient release are sensitive to acid deposition during litter decomposition in a subtropical Cinnamomum camphora forest

Can Wu (1), Xiangshi Kong (1-2)   , Xingbing He (1), Yonghui Lin (1), Zaihua He (1), Yuehong Gao (1), Qin Kong (1)

iForest - Biogeosciences and Forestry, Volume 16, Issue 6, Pages 314-324 (2023)
doi: https://doi.org/10.3832/ifor4324-016
Published: Nov 13, 2023 - Copyright © 2023 SISEF

Research Articles


Arbuscular mycorrhizal fungi (AMF) play an important role on litter decomposition, which is increasing suffering the negative impact of acid deposition. In this study, we investigated the AMF effects on litter decomposition via suppressing AMF and simulating acid deposition in a subtropical Cinnamomum camphora forest. The results showed that acid deposition and AMF suppression decelerated C. camphora leaf litter decomposition, especially at late decomposition stage; soil water content was the main factor restricting early-stage decomposition. The inhibiting effect of acid deposition was enhanced with acid intensity increase and AMF suppression aggravated the negative effect of acid stress on decomposition. Nitrogen-cycling enzymatic activity was significantly higher in later than in early decomposition stage, and acid deposition and AMF suppression significantly decreased microbial activity. Despite the seasonal effect was overwhelming, we still detected the effects of acid deposition and AMF suppression on litter nutrient release. Without or under low acid deposition, AMF suppression significantly increased organic matter and decreased alkali-hydrolyzable nitrogen content of detritusphere soil. Acid deposition significantly reduced soil organic matter content, while high acid deposition intensity increased alkali-hydrolyzable nitrogen content after 2- and 12-month decomposition, and decreased it at other months. Both acid deposition and AMF suppression decreased available phosphorus content, but did not affect phosphatase activity. AMF effects on invertase and nitrogen-release enzyme activities, and alkali-hydrolyzable nitrogen and available phosphorus contents of detritusphere soil were highly sensitive to acid deposition. Our results revealed that AMF effects on microbial activity and nutrient release during litter decomposition are sensitive to acid deposition.

  Keywords


Litter Decomposition, Arbuscular Mycorrhizal Fungi, Acid Deposition, Extracellular Enzyme Activity, Detritusphere Soil Nutrients

Authors’ address

(1)
Can Wu
Xiangshi Kong 0000-0003-3541-5663
Xingbing He 0000-0001-6726-1799
Yonghui Lin
Zaihua He 0000-0002-4975-8141
Yuehong Gao
Qin Kong
College of Biology and Environmental Sciences, Jishou University, Jishou, 416000 (China)
(2)
Xiangshi Kong 0000-0003-3541-5663
Key Laboratory for Ecotourism of Hunan Province, School of Tourism, Jishou University, Jishou, 416000 (China)

Corresponding author

 
Xiangshi Kong
1123682531@qq.com

Citation

Wu C, Kong X, He X, Lin Y, He Z, Gao Y, Kong Q (2023). Effects of arbuscular mycorrhizal fungi on microbial activity and nutrient release are sensitive to acid deposition during litter decomposition in a subtropical Cinnamomum camphora forest. iForest 16: 314-324. - doi: 10.3832/ifor4324-016

Academic Editor

Claudia Cocozza

Paper history

Received: Feb 08, 2023
Accepted: Sep 12, 2023

First online: Nov 13, 2023
Publication Date: Dec 31, 2023
Publication Time: 2.07 months

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