Long-Term Harvest Residue Retention Could Decrease Soil Bacterial Diversities Probably Due to Favouring Oligotrophic Lineages

Microbial Ecology
Yaling ZhangZhihong Xu

Abstract

Harvest residues contain large stores of carbon (C) and nitrogen (N) in forest plantations. Decomposing residues can release labile C and N into soil and thus provide substrates for soil bacterial communities. Previous studies showed that residue retention could increase soil C and N pools and activate bacterial communities in the short term (≤ 10 years). The current study examined the effects of a long-term (19-year) harvest residue retention on soil total and water and hot water extractable C and N pools, as well as bacterial communities via Illumina MiSeq sequencing. The experiment was established in a randomised complete block design with four replications, southeast Queensland of Australia, including no (R0), single (R1, 51 to 74 t ha-1 dry matter) and double quantities (R2, 140 t ha-1 dry matter) of residues retained. Generally, no significant differences existed in total C and N, as well as C and N pools extracted by water and hot water among the three treatments, probably due to negligible amounts of labile C and N released from harvest residues. Soil δ15N significantly decreased from R0 to R1 to R2, probably due to reduced N leaching with residue retention (P < 0.001). Residue retention increased the relative abundance...Continue Reading

References

Jul 6, 2006·Applied and Environmental Microbiology·T Z DeSantisG L Andersen
Feb 23, 2007·FEMS Microbiology Ecology·Matthew David WallensteinJoshua Schimel
Jul 3, 2007·Ecology·Noah FiererRobert B Jackson
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Mar 12, 2013·Bioresource Technology·Vidya de GannesWilliam J Hickey
Jul 29, 2016·Applied Microbiology and Biotechnology·Adria L FernandezMichael J Sadowsky

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Citations

Oct 4, 2020·Environmental Science and Pollution Research International·Leila AsadyarShahla Hosseini Bai

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Datasets Mentioned

BETA
PRJNA417164

Methods Mentioned

BETA
nuclear magnetic resonance
NMR
PCR

Software Mentioned

Varian
usearch
Quantitative Insights into Microbial Ecology QIIME
R
PERMANOVA
PEAR
vegan
UPARSE OTU analysis pipeline

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