| Title | One-time strategic tillage does not cause major impacts on soil microbial properties in a no-till Calcisol |
| Publication Type | Journal Article |
| Year of Publication | 2016 |
| Authors | Liu H.W, Carvalhais L.C, Rincon-Florez V., Crawford M., Dang Y.P, Dennis P.G, Schenk P.M |
| Journal | Soil & Tillage Research |
| Volume | 158 |
| Pagination | 91-99 |
| Date Published | May |
| Type of Article | Article |
| ISBN Number | 0167-1987 |
| Accession Number | WOS:000373244700010 |
| Keywords | Agriculture, Bacterial genetic fingerprinting, biomass, carbon, Conservation, CONSERVATION TILLAGE, CULTIVATION, enzyme-activities, management, Northern Grains Region of Australia, phosphorus, quality, soil microbial activity, SYSTEMS, YIELD |
| Abstract | Strategic tillage (or occasional tillage) has been touted as a potential solution for the severe weed infestations of long-term no-till (NT). Nevertheless, there is little information on the influence of strategic tillage on microbial properties of Australian NT soils. In the present study, we assessed the influence of strategic tillage on the microbial properties of a seven years' NT Calcisol in Moonie, Queensland, Australia. We tested the hypothesis that the application of one-time strategic tillage with chisel or offset disc does not cause major impacts on soil biological health in a NT system. Strategic tillage was applied once and soil samples were collected 13 months after tillage from the depths 0-10 and 10-20 cm. The measured biological indicators included soil microbial biomass carbon, catabolic activity (MicroResp (TM) assay) and total microbial activity (fluorescein diacetate method). The structure of bacterial communities was profiled by quantitative polymerase chain reaction (qPCR) and terminal reaction fragment length polymorphism (T-RFLP). Principal components analyses based on qPCR and T-RFLP data did not show tillage effects on soil bacterial communities. However, relative to the NT, chisel tillage led to significant increases in microbial biomass carbon (+34.4%), abundances of Alphaproteobacteria (+74.6%), Bacteroidetes (+113.7%) and Firmicutes (+36.5%), and the utilisation of D+ cellubiose (+178.4%) as well as mannitol (+167.2%) at 0-10 cm depth. In contrast, the influence of offset disc tillage was restricted to an increased abundance of Alphaproteobacteria (+64.6%) at 0-10 cm depth. Our study suggests that, overall, one-time strategic tillage using either chisel or offset disc had a minor positive influence on soil biological attributes of the NT Calcisol 13 months after tillage. (C) 2015 Elsevier B.V. All rights reserved.
|
| Short Title | Soil Tillage Res.Soil Tillage Res. |
| Alternate Journal | Soil Tillage Res. |
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Liu, Hongwei Carvalhais, Lilia C. Rincon-Florez, Vivian Crawford, Mark Dang, Yash P. Dennis, Paul G. Schenk, Peer M.
Grains Research and Development Corporation [ERM00003]; Australian Research Council; China Scholarship Council (CSC)
The authors thank the Grains Research and Development Corporation (Project ERM00003) and the Australian Research Council for supporting this project. HL gratefully acknowledges financial support from the China Scholarship Council (CSC). The authors also thank Nev Boland for carrying out tillage and field operations, and Dr Jessica Dalton-Morgan for the proofreading of the manuscript.
ELSEVIER SCIENCE BV
AMSTERDAM
SOIL TILL RES
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