Strategic tillage did not affect soil microbial bioindicators in long-term no-till farming systems in vertosols from Queensland, Australia

Rincon-Florez, Vivian A., Carvalhais, Lilia C., Liu, Hongwei, Dang, Yash, Crawford, Mark, Balzer, Anna, Bell, Mike, Ram, Dalal and Schenk, Peer (2014). Strategic tillage did not affect soil microbial bioindicators in long-term no-till farming systems in vertosols from Queensland, Australia. In: Proceedings of the Soil Science Australia National Soil Science Conference. Soil Science 2014: National Soil Science Conference, Melbourne, VIC, Australia, (1-1). 23-27 November 2014.

Author Rincon-Florez, Vivian A.
Carvalhais, Lilia C.
Liu, Hongwei
Dang, Yash
Crawford, Mark
Balzer, Anna
Bell, Mike
Ram, Dalal
Schenk, Peer
Title of paper Strategic tillage did not affect soil microbial bioindicators in long-term no-till farming systems in vertosols from Queensland, Australia
Conference name Soil Science 2014: National Soil Science Conference
Conference location Melbourne, VIC, Australia
Conference dates 23-27 November 2014
Convener Soil Science Australia
Proceedings title Proceedings of the Soil Science Australia National Soil Science Conference
Place of Publication Warragul, VIC, Australia
Publisher Australian Society of Soil Science
Publication Year 2014
Sub-type Published abstract
Open Access Status
ISBN 97800958659529
9780958659529
Start page 1
End page 1
Total pages 1
Language eng
Formatted Abstract/Summary
Heavy rains in recent years have triggered an increase in hard-to-kill weeds and crop diseases in long-term no-till farming systems (NT) in Queensland. As a possible solution, occasional or strategic tillage (ST) has been applied during fallow in farms near Jimbour and Biloela. We investigated the impact of different frequencies (1 to 3) and timings of tillage on soil microbial communities as indicators of soil health. Tillage implements included chisel plow sweeps (Biloela), narrow chisel point and offset disc (Jimbour). Single tillage operations were applied in December 2012, January or March 2013, while the dual tillage operations were done in December 2012 and January 2013 and the triple tillage operations were done on each occasion. Seven soil samples were collected in April 2013 from 0-0.1m and 0.1-0.2m depths and composited separately for each depth. Samples were therefore obtained 2, 10 and 17 weeks after tillage imposition. Samples were analysed for microbial biomass, total enzymatic (Fluorescein Diacetate Assay) and metabolic activity (MicrorespTM) and microbial genetic fingerprinting (Terminal Restriction Fragment Length Polymorphism). Overall, there was no significant difference in these parameters between NT and ST at both the sites. However, significant differences between soil depths were found in enzymatic activity for Biloela and biomass and metabolic activity for Jimbour. No major effects of ST were found with the microbial indicators used under different timings and frequencies and type of tillage. Therefore, ST may be undertaken with limited impact on soil microbial communities to combat weed outbreaks in NT systems in Queensland.
Q-Index Code EX
Q-Index Status Provisional Code
Institutional Status UQ
Additional Notes Other title: "Strategic tillage did not affect soil microbial bio-indicators in long-term no-till farming systems in vertosols from Queensland, Australia".

Malformed ISBN as published: should be "9780958659529".

 
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Created: Thu, 19 Mar 2015, 13:33:30 EST by Associate Professor Michael Bell on behalf of School of Agriculture and Food Sciences