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final report Project Code: NAP3.227 Prepared by: David G. Phelps Department of Primary Industries Date published: MAY 2003 ISBN: 1 74036 175X PUBLISHED BY Meat and Livestock Australia Limited Locked Bag 991 NORTH SYDNEY NSW 2059 SUSTAINABLE GRAZING IN THE CHANNEL COUNTRY FLOODPLAINS Meat & Livestock Australia acknowledges the matching funds provided by the Australian Government to support the research and development detailed in this publication. This publication is published by Meat & Livestock Australia Limited ABN 39 081 678 364 (MLA). Care is taken to ensure the accuracy of the information contained in this publication. However MLA cannot accept responsibility for the accuracy or completeness of the information or opinions contained in the publication. You should make your own enquiries before making decisions concerning your interests. Reproduction in whole or in part of this publication is prohibited without prior written consent of MLA. Sustainable Grazing in the Channel Country Floodplains SUSTAINABLE GRAZING IN THE CHANNEL COUNTRY FLOODPLAINS. A TECHNICAL REPORT ON FINDINGS BETWEEN JUNE 1999 AND AUGUST 20021 David G. Phelps2 K.A. Day M.R. Jeffery P.T. Connelly G.W. Fraser B.S. McCallum M.T. Sullivan I.A. White S.A. Robertson D.H. Cobon April 2003 1 NHT projects 972625 & 2012630 and MLA project NAP3.227 2 project leader 1 Sustainable Grazing in the Channel Country Floodplains TABLE OF CONTENTS SUSTAINABLE GRAZING IN THE CHANNEL COUNTRY FLOODPLAINS. A TECHNICAL REPORT ON FINDINGS BETWEEN JUNE 1999 AND AUGUST 2002.........................................................................................1 TABLE OF CONTENTS .................................................................................................................................................2 ABSTRACT .......................................................................................................................................................................8 EXECUTIVE SUMMARY..............................................................................................................................................9 PROJECT BACKGROUND AND INDUSTRY CONTEXT ..................................................................................11 Biophysical description of the Channel Country......................................................................................12 Industry Context.......................................................................................................................................20 Impacts ....................................................................................................................................................22 PROJECT OBJECTIVES .............................................................................................................................................25 SUCCESS IN ACHIEVING OBJECTIVES...............................................................................................................26 Objective 1. By community consultation document the existing knowledge of flood responses and floodplain management ...........................................................................................................................26 Objective 2. Improve technical knowledge of floodplain vegetation response by monitoring at selected study sites................................................................................................................................................26 Objective 3. Describe vegetation response in terms of palatability, nutrition, species richness and carrying capacity......................................................................................................................................28 Objective 4. Develop and promote practical indicators and techniques to assist producers in sustainable management.........................................................................................................................28 Objective 5. Promote and extend the range of sustainable management practices and best practice grazing systems.......................................................................................................................................29 Objective 6. Compile and publish the literature review and the community consultation data ...............31 Objective 7. Produce and publish “Managing Grazing in the Channel Country”.....................................31 Objective 8. Produce and publish “Plants of the Channel Country” in association with the Channel Landcare Group.......................................................................................................................................32 IMPACT ON NATURAL RESOURCE MANAGEMENT - NOW AND IN FIVE YEARS TIME..................33 METHODS.......................................................................................................................................................................34 Documenting current knowledge .............................................................................................................34 Expanding the knowledge base...............................................................................................................34 Communication methods.........................................................................................................................39 RESULTS AND DISCUSSION.....................................................................................................................................41 2 Sustainable Grazing in the Channel Country Floodplains Rainfall and flood patterns.......................................................................................................................41 Soil relationships......................................................................................................................................51 Pasture relationships ...............................................................................................................................75 Preliminary modelling to integrate data and predict pasture growth .....................................................104 CONCLUSIONS AND RECOMMENDATIONS....................................................................................................117 Model calibration....................................................................................................................................117 Model application...................................................................................................................................117 General issues.......................................................................................................................................118 Recommendations.................................................................................................................................119 BIBLIOGRAPHY .........................................................................................................................................................120 ACKNOWLEDGEMENTS.........................................................................................................................................123 APPENDICES ...............................................................................................................................................................124 Appendix 1. Sustainable Grazing In The Channel Country Floodplains Project Steering Committee..125 Appendix 2. Bureau of Meteorology flood category definitions for the Cooper, Diamantina and Georgina systems, and major historic flood heights (from BOM web site, www.bom.gov.au/hydro/flood/)..........126 Appendix 3. Copies of available Channel Country Project communications distributed to the public. .131 3 Sustainable Grazing in the Channel Country Floodplains FIGURES Figure 1. The major pasture communities of western Qld. .........................................................................11 Figure 2. The project study area covers the extensive floodplain systems within the Lake Eyre basin, with sites spread across the major floodplains............................................................................................13 Figure 3. The extent of Channel (floodplain) Land Systems in Queensland in relation to Local Government Areas (shire boundaries).................................................................................................16 Figure 4. The location of WARLUS study areas within Queensland...........................................................17 Figure 5. An example of the locations of C1, C2 and C3 Land Systems relative to a major river channel, in this case Cooper Creek south of Windorah. Land Systems are shown overlaying a satellite image (Landsat TM) from mid 1995................................................................................................................19 Figure 6. The relationship between bluebush stem number and dry weight (g/quadrat)............................38 Figure 7. The proportions of sand, silt and clay at 10-20 and 50-60 cm depth at all sites..........................51 Figure 8. Soil pH at 0-10, 50-60 and 90-100 cm depth for a) Cooper Creek, b) Diamantina River and c) Georgina River sites.............................................................................................................................52 Figure 9. Soil Electrical Conductivity (EC, mS/cm) at 0-10, 50-60 and 90-100 cm depth for a) Cooper Creek, b) Diamantina