| Title | Soil aggregation and associated microbial communities modify the impact of agricultural management on carbon content |
| Publication Type | Journal Article |
| Year of Publication | 2017 |
| Authors | Trivedi P., Delgado-Baquerizo M., Jeffries T.C, Trivedi C., Anderson I.C, Lai K., McNee M., Flower K., Singh B.P, Minkey D., Singh B.K |
| Journal | Environmental Microbiology |
| Volume | 19 |
| Pagination | 3070-3086 |
| Date Published | Aug |
| Type of Article | Article |
| ISBN Number | 1462-2912 |
| Accession Number | WOS:000407790700013 |
| Keywords | bacterial communities, classes, climate-change, conservation agriculture, cropping systems, diversity, land-use, Microbiology, organic-matter dynamics, residue management, size, tillage |
| Abstract | Soil carbon (C) stabilisation is known to depend in part on its distribution in structural aggregates, and upon soil microbial activity within the aggregates. However, the mechanisms and relative contributions of different microbial groups to C turnover in different aggregates under various management practices remain unclear. The aim of this study was to determine the role of soil aggregation and their associated microbial communities in driving the responses of soil organic matter (SOM) to multiple management practices. Our results demonstrate that higher amounts of C inputs coupled with greater soil aggregation in residue retention management practices has positive effects on soil C content. Our results provide evidence that different aggregate size classes support distinct microbial habitats which supports the colonisation of different microbial communities. Most importantly our results indicate that the effects of management practices on soil C is modulated by soil aggregate sizes and their associated microbial community and are more pronounced in macro-aggregate compared with micro-aggregate sizes. Based on our findings we recommend that differential response of management practices and microbial control on the C turnover in macro-aggregates and micro-aggregate should be explicitly considered when accounting for management impacts on soil C turnover. |
| Short Title | Environ. Microbiol.Environ. Microbiol. |
| Alternate Journal | Environ. Microbiol. |
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- Soil aggregation and associated microbial communities modify the impact of agricultural management on carbon content
Soil aggregation and associated microbial communities modify the impact of agricultural management on carbon content
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Trivedi, Pankaj Delgado-Baquerizo, Manuel Jeffries, Thomas C. Trivedi, Chanda Anderson, Ian C. Lai, Kaitao McNee, Matthew Flower, Kenneth Singh, Bhupinder Pal Minkey, David Singh, Brajesh K.
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Flower, Kenneth/0000-0002-7477-9921
Grains Research and Development Corporation (GRDC), Australia [UWS000008]; Australian Research Council [DP13010484]; GRDC, Australia
We thank Dr W. Dougherty and Prof J. Six for valuable discussions on soil fractionation protocol and Dr Jasmine Grinyer for providing critical comments. The Grains Research and Development Corporation (GRDC), Australia via Grant number UWS000008 and Australian Research Council via Grant number DP13010484 funded this work. The long-term field experiment was funded by GRDC, Australia.
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Trivedi, P; Singh, BK (reprint author), Western Sydney Univ, Hawkesbury Inst Environm, Locked Bag 1797, Penrith, NSW 2751, Australia.; Trivedi, P (reprint author), Colorado State Univ, Dept Bioagr Sci & Pest Management, Ft Collins, CO 80523 USA.; Singh, BK (reprint author), Western Sydney Univ, Global Ctr Land Based Innovat, Bldg L9,Locked Bag 1797, Penrith, NSW 2751, Australia.
pankaj.trivedi@colostate.edu; b.singh@westernsydney.edu.au
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