| Title | Long-term successive rotation affects soil microbial resource limitation and carbon use efficiency in Chinese fir (Cunninghamia lanceolata) monoculture plantations |
| Publication Type | Journal Article |
| Year of Publication | 2023 |
| Authors | Zhu D.M, Liu Y., Chen J.H, Jiang P.K |
| Journal | Forest Ecology and Management |
| Volume | 540 |
| Pagination | 10 |
| Date Published | Jul |
| Type of Article | Article |
| ISBN Number | 0378-1127 |
| Accession Number | WOS:001000887400001 |
| Keywords | Chinese fir plantation, cnp, communities, Ecoenzymatic stoichiometry, extracellular enzyme-activity, Forestry, litter decomposition, loess plateau, microbial carbon use efficiency, nutrient acquisition, organic-matter, plant, soil quality, Stoichiometry, transect |
| Abstract | Long-term successive rotation has resulted in negative effects on stand productivity, soil nutrient pool and mi-crobial diversity and function in monoculture tree plantations. However, how successive rotation influences soil microbial nutrient limitation and carbon use efficiency (CUE) and their linkage with resource carbon (C): ni-trogen (N): phosphorus (P) stoichiometry remain largely unknown. To solve this puzzle, we compared the C:N:P stoichiometries of leaf litter, fine root and soil, as well as microbial biomass and enzyme activities among three Chinese fir (Cunninghamia lanceolata) plantations with first (FRP), second (SRP) and third (TRP) generations and a natural broad-leaved forest (BL). We found that long-term successive rotation of Chinese fir decreased litter biomass by 64.7% -80.9% and enhanced litter C:N ratio by 2.7% -36.0% compared to the BL. Successive rotation decreased the contents of dissolved organic C, total N, and soil C:P and N:P ratios, and resulted in an increased C:N imbalance between soil microorganisms and nutrients in the TRP generation. Long-term successive rotation increased microbial C limitation by 1.5% -11.1% but decreased N and P limitations by 127.3% -160.9% and 15.3% -37.5%, compared with the BL, and resulted in significant increases in microbial CUE and substrate-induced respiration rate of C to N sources in the TRP generation. Structural equation modeling sug-gested that successive rotation indirectly affected microbial CUE and SIR by changing litter C:N, enzyme C:N and soil C:N imbalance. Collectively, these findings indicated that long-term successive rotation aggravated soil microbial C (energy) limitation and affected microbial CUE and capacity due to the increased stoichiometric imbalance between their resources. Future management practices that could increase litter and soil quality could be helpful to decrease microbial C limitation and maintain microbial functionality for sustainable monoculture plantations.
|
| Short Title | For. Ecol. Manage.For. Ecol. Manage. |
| Alternate Journal | For. Ecol. Manage. |
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Times Cited: 0
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Zhu, Danmiao Liu, Yang Chen, Junhui Jiang, Peikun
National Natural Science Foundation of China [32271850]; Natural Science Foundation of Zhejiang Province in China [LZ22C160001]
Acknowledgements We thank the anonymous reviewers for their very valuable com-ments in improving both the language and scientific quality of the manuscript. This work was funded by the National Natural Science Foundation of China (32271850) , the Natural Science Foundation of Zhejiang Province in China (LZ22C160001) .
11
Elsevier
Amsterdam
1872-7042
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