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Effect of Soil Acidification on Temperature Sensitivity of Soil Respiration

Authors :
Lin Jin
Keke Hua
Linchuan Zhan
Chuanlong He
Daozhong Wang
Hirohiko Nagano
Weiguo Cheng
Kazuyuki Inubushi
Zhibin Guo
Source :
Agronomy, Vol 14, Iss 5, p 1056 (2024)
Publication Year :
2024
Publisher :
MDPI AG, 2024.

Abstract

Soil pH significantly impacts microbial activity and community assembly, which in turn determines the temperature sensitivity (Q10) of soil respiration. Due to the high soil acidification in China, it is necessary to understand how soil acidification impacts Q10. Here, the Q10 of soil respiration was examined in a long-term field experiment (1982–present) with different soil pH caused by fertilization management. In this experiment, we selected treatments with neutral pH: (1) no crops and fertilization (CK); (2) crops without fertilization (NF); low pH with (3) crops with chemical fertilization (NPK); and (4) crops with chemical fertilization combined with wheat straw incorporation (WS). Under natural soil temperature changes, we observed that soil acidification lowered the Q10 value of soil respiration. Considering only temperature changes, the Q10 of soil respiration was strongly associated with microbial community composition, alpha diversity, and soil ammonium nitrogen. Considering the interaction between soil pH and temperature, warming strengthened the negative effect of soil pH on the Q10 of soil respiration, and the pathway through which soil pH mediated Q10 included not only microbial community composition, alpha diversity, and biomass but also the soil’s available phosphorus. This work enhanced our insights into the relationships between Q10, temperature, and soil pH by identifying important microbial properties and key soil environmental factors.

Details

Language :
English
ISSN :
20734395
Volume :
14
Issue :
5
Database :
Directory of Open Access Journals
Journal :
Agronomy
Publication Type :
Academic Journal
Accession number :
edsdoj.075e25ba6ce24b8eaf3e939be7739971
Document Type :
article
Full Text :
https://doi.org/10.3390/agronomy14051056