Increasing nitrogen (N) and phosphorus (P) enter is among the main contributors to anthropogenic local weather change, which may regulate the sequestration and storage of soil natural carbon (SOC) by altering microbial communities and their residues, the numerous part of secure SOC. However, it stays unclear how N and P fertilization affect aggregate-associated microbial communities and their residues in P-deficient soils. Answering this query is of nice significance to reaching a greater understanding of soil carbon cycles underneath carbon neutrality.
A analysis workforce led by Wang Qingkui from the Institute of Applied Ecology of the Chinese Academy of Sciences lately carried out a six-year fertilization manipulation experiment to discover the impacts of N and P fertilization on soil microbial communities and their residues at mixture scales in subtropical P-deficient plantation soil.
They discovered that N and/or P fertilization considerably decreased the soil microbial biomass of bulk soils as a result of a lower in bacterial biomass in small macroaggregates and microaggregates, and fungi in massive macroaggregates. However, there was no important distinction amongst these fertilization remedies, indicating a non-additive interplay of N and P fertilization.
N/P fertilization redistributed microbial residues from massive to small macroaggregates by stimulating fungal residues in small macroaggregates.
Moreover, lower in root biomass, reasonably than soil pH, was answerable for the discount in soil microbial biomass and adjustments in microbial residue distribution.
These findings spotlight that the interactive impact of N and P fertilization and mixture sizes needs to be thought of to assist enhance the prediction of soil carbon dynamics underneath fertilization.
This examine was revealed in European Journal of Soil Biology and was supported by the National Natural Science Foundation of China and the Key initiatives of Jiangxi Science and Technology Program.
Yanli Jing et al, Non-additive results of nitrogen and phosphorus fertilization on microbial biomass and residue distribution in a subtropical plantation, European Journal of Soil Biology (2021). DOI: 10.1016/j.ejsobi.2021.103376
Citation:
Study finds fertilization impacts soil microbial biomass and residue distribution by altering root biomass (2022, January 4)
retrieved 4 January 2022
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