Opportunities for plant improvement to increase the value of forage shrubs on low-rainfall mixed farms
M. Monjardino A C , A. Bathgate B and R. Llewellyn A
+ Author Affiliations
- Author Affiliations
A CSIRO Agriculture Flagship, PMB 2, Glen Osmond, SA 5064, Australia.
B Farming Systems Analysis Service, 41 Trebor Road, Albany, WA Australia.
C Corresponding author. Email: Marta.Monjardino@csiro.au
Crop and Pasture Science 65(10) 1057-1067 https://doi.org/10.1071/CP13413
Submitted: 29 November 2013 Accepted: 22 April 2014 Published: 7 October 2014
Abstract
Plantings of forage shrubs such as saltbush (Atriplex spp.) in the drier part of the crop–livestock zone of southern Australia have the potential to help fill feed autumn gaps, provide valuable feed during drought periods, and provide year-round groundcover, shelter for livestock and options for management of saline soils. However, the proportion of farms with forage shrub plantings and the extent of those plantings remain relatively low, with the rate of new plantings slowing over the past decade. Development of new forage-shrub options has been occurring with the aim of improving the feed value and adoption of forage shrubs. Using a whole-farm bio-economic optimisation model for a crop–livestock farming system in the low-rainfall Mallee region of southern Australia (Mallee MIDAS—model of an integrated dryland agricultural system), we explored how key attributes of forage-shrub plantings and the associated pasture understorey, such as biomass growth, digestibility and ease of establishment, can make forage shrub plantings economically more attractive to farmers. We found that saltbush types and forage-shrub options with improved feed quality characteristics will offer the opportunity for improved economic returns and increased profitability from larger plantings compared with existing options. Improving feed quality was more important than increasing the growth rates of saltbush plants. Results still indicate only a niche role in farming systems, with profit typically being greatest when using relatively small areas (<10% of farm area) on the less productive soils of the farm. The results suggest that the profitability of forage shrubs will be greatest for those growers with larger areas of marginal cropping soils and greater reliance on livestock than cropping. Furthermore, the results demonstrate that, if cereal prices or yields fall significantly and/or lamb prices rise, the value of a forage shrub planting can increase substantially. The principles revealed have wide application beyond the region, although these need to be adapted on-farm and widely disseminated before potential contribution to Australian agriculture can be realised.
Additional keywords: economics, Mallee, MIDAS, perennials, resource allocation, saltbush, whole-farm modelling.
References
ABARE (2011) Australian Commodities, March quarter 2011. Available at: http://data.daff.gov.au/data/warehouse/pe_A20110920.01/AC2011.V1.1_AgCommodities1.2.0_LR.pdfBarrett-Lennard EG, Malcolm CV, Bathgate A (2003) ‘Saltland pastures in Australia—a practical guide.’ 2nd edn. Land, Water and Wool Sustainable Grazing of Saline Lands Sub-program. (Land & Water Australia: Canberra, ACT)
Bathgate A, Byrne F, Hoque Z (2007) The economic value of improving pasture production on saltland in Southern Australia. Final Report, SGSL Economics Theme, Land Water and Wool, Land and Water Australia.
Bathgate A, Reynolds M, Monjardino M (2012) ‘MIDAS Mallee Model. MM2012-Version 12.’ (Department of Agriculture and Food of Western Australia and CSIRO: Perth, W. Aust.)
Bell LW, Robertson MJ, Revell DK, Lilley JM, Moore AM (2008) Approaches for assessing some attributes of feed-base systems in mixed farming enterprises. Australian Journal of Experimental Agriculture 48, 789–798.
| Approaches for assessing some attributes of feed-base systems in mixed farming enterprises.Crossref | GoogleScholarGoogle Scholar |
Bennett A, Edward A, Young J, Kingwell R (2004) Compilation of case studies assessing the viability of lucerne, oil mallees and saltland pastures. Department of Agriculture, Western Australia, Miscellaneous Publication No. 4/2004.
Blennerhassett S, Bathgate A, Petersen E, O’Connell M (2002) ‘MIDAS Central Wheatbelt Model. CWM2002-5.’ (Department of Agriculture, Western Australia: South Perth, W. Aust.)
Bulman P (2003) Evaluation of revegetation options used to reduce recharge. Report for Murray Mallee Local Action Planning Association, Murray Bridge, S. Aust.
Byrne F, Robertson MJ, Bathgate A, Hoque Z (2010) Factors influencing potential scale of adoption of a perennial pasture in a mixed crop-livestock farming system. Agricultural Systems 103, 453–462.
| Factors influencing potential scale of adoption of a perennial pasture in a mixed crop-livestock farming system.Crossref | GoogleScholarGoogle Scholar |
De Koning C, Milthorpe P (2008) Integrating forage shrubs: their potential in mixed-farming enterprises in low rainfall regions. Publication No. 08/044, RIRDC, Canberra, ACT.
Dent JB, Harrison SR, Woodford KB (1986) ‘Farm planning with Linear Programming: concept and practice.’ (Butterworths Pty Ltd: Sydney)
Descheemaeker K, Smith AP, Robertson MJ, Whitbread AM, Huth NI, Davoren W, Emms J, Llewellyn R (2014) Simulation of water-limited growth of the forage shrub saltbush (Atriplex nummularia Lindl.) in the low-rainfall environment of southern Australia. Crop & Pasture Science 65, 1068–1083.
Doole GJ, Bathgate AD, Robertson MJ (2009) Labour scarcity restricts the potential scale of grazed perennial plants in the Western Australian wheatbelt. Animal Production Science 49, 883–893.
| Labour scarcity restricts the potential scale of grazed perennial plants in the Western Australian wheatbelt.Crossref | GoogleScholarGoogle Scholar |
Edwards J, Umbers A, Wentworth S (2012) GRDC Farm Practices Survey Report 2012. Grains Research and Development Corporation, Canberra, ACT.
Emms J, Bennell M, Hughes S (2006) Profitable and sustainable perennial grazing systems: searching for the right shrub species. In ‘Groundbreaking stuff. Proceedings of the 13th Australian Agronomy Conference’. Perth, W. Aust. (Australian Society of Agronomy/The Regional Institute Ltd: Gosford, NSW) Available at: www.regional.org.au/au/asa/2006/poster/pests/4642_emmsj.htm
Harris R, Emms J, Nalder K, Beloy J, Davies C, Braby M (2008) Forage shrubs for alternative grazing systems. Joint Project/Scoping Report of DPI Victoria, SARDI, Mallee MCA, FFI CRC.
Hill P, Gobbett D (2006) Identifying the fit for saltbush in the low-rainfall node of the South-East Australian Mallee. Unpublished Report for the Future Farm Industries CRC, EverCrop Project: Developing the role of perennials in mixed-farming systems.
Hobbs TJ, Bennell M, Huxtable D, Bartle J, Neumann C, George N, O’Sullivan W, McKenna D (2009) Potential agroforestry species and regional industries for lower rainfall southern Australia. FloraSearch 2. Publication No. 07/082, RIRDC, Canberra, ACT. Available at: https://rirdc.infoservices.com.au/items/07-082
Jones B (2005) ‘Farming the Mallee with guidance: Changing the system, crop intensity.’ (DPI PIR: East Melbourne)
Jones B (2008) Farming Systems trial economics 2008. Mallee Focus and BCG report. Birchip Cropping Group. Available at: www.bcg.org.au/view_trial.php?trial_id=683&src
Jones B, Latta R (2005) ‘Farming the Mallee with guidance: Changing the system, livestock.’ (DPI PIR: Victoria, Australia)
Kingwell R (2011) Revenue volatility faced by Australian wheat farmers. In ‘55th Annual Conference of the Australian Agricultural and Resource Economics Society’. 8-11 February 2011, Melbourne. (AARES Inc.) Available at: http://ageconsearch.umn.edu/handle/100572
Kingwell RS, Pannell DJ (1987) ‘MIDAS, a bioeconomic model of a dryland farm system.’ (Pudoc: Wageningen, The Netherlands)
Kingwell RS, Pannell DJ, Robinson SD (1993) Tactical responses to seasonal conditions in whole-farm planning in Western Australia. Agricultural Economics 8, 211–226.
| Tactical responses to seasonal conditions in whole-farm planning in Western Australia.Crossref | GoogleScholarGoogle Scholar |
Knight A, Blott K, Portelli M, Hignett S (2002) Use of tree and shrub belts to control leakage in three dryland cropping environments. Australian Journal of Agricultural Research 53, 571–586.
| Use of tree and shrub belts to control leakage in three dryland cropping environments.Crossref | GoogleScholarGoogle Scholar |
Land and Water Australia (2005) Managing sheep production from a changing feed base in the Mallee. Grain and Graze Report, June 2005. NSW Department of Primary Industries.
Llewellyn RS, Whitbread A, Lawes R, Raisbeck-Brown N, Hill P (2010) Fork in the road: forage shrub plantings by crop-livestock farmers in a low rainfall region of southern Australia. In ‘Food security from sustainable agriculture. Proceedings 15th Australian Agronomy Conference’. Lincoln, New Zealand. (Australian Society of Agronomy/The Regional Institute Ltd: Gosford, NSW) Available at: www.regional.org.au/au/asa/2010/pastures-forage/dryland-perennials/7179_llewellynr.htm
Llewellyn RS, D’Emden FH, Kuehne G (2012) Extensive use of no-tillage in grain growing regions of Australia. Field Crops Research 132, 204–212.
| Extensive use of no-tillage in grain growing regions of Australia.Crossref | GoogleScholarGoogle Scholar |
Llewellyn RS, Robertson MJ, Hayes RC, Ferris D, Descheemaeker K, Revell C (2014) Developing the role of perennial forages for crop–livestock farms: a strategic multi-disciplinary approach. Crop & Pasture Science 65, 945–955.
McLeod X (1989) An economic evaluation of the impact of conservation-oriented land use regulations on pastoral leases in Mallee landscapes of Western New South Wales. In ‘The Mallee lands, a conservation perspective’. (Eds JC Noble, PJ Joss, GK Jones) pp. 287–292. (CSIRO Publishing: Melbourne)
Monjardino M, Revell D, Pannell DJ (2010) The potential contribution of forage shrubs to economic returns and environmental management in Australian dryland agricultural systems. Agricultural Systems 103, 187–197.
| The potential contribution of forage shrubs to economic returns and environmental management in Australian dryland agricultural systems.Crossref | GoogleScholarGoogle Scholar |
Monjardino M, McBeath TM, Brennan L, Llewellyn RS (2013) Are farmers in low-rainfall cropping regions under-fertilising with nitrogen? A risk analysis. Agricultural Systems 116, 37–51.
| Are farmers in low-rainfall cropping regions under-fertilising with nitrogen? A risk analysis.Crossref | GoogleScholarGoogle Scholar |
Morrison DA, Pannell DJ, Kingwell RS, Ewing MA (1986) A mathematical programming model of a crop–livestock farm system. Agricultural Systems 20, 243–268.
| A mathematical programming model of a crop–livestock farm system.Crossref | GoogleScholarGoogle Scholar |
Newell J (1961) Soils of the Mallee Research Station, Walpeup, Victoria. Technical Bulletin No. 13. Department of Agriculture, Victoria, East Melbourne.
Nicholls C (2011) EverCrop® opens door to innovative options in marginal landscapes. Future Farm 7 (April), pp. 14–15.
Norman H (2012) Saltbush development narrows the field. Future Farm: Innovation in profitable perennial farming systems 11 (August 2012), pp. 4–5.
Norman HC, Masters D, Silberstien R, Byrne F (2008) Achieving profitable and environmentally beneficial grazing systems for saline land in Australia. In ‘Options Méditerranées, Serie A: Séminaires Méditerranées’. No. 79, pp. 85?88. (CIHEAM: Paris)
Norman HC, Wilmot MG, Thomas DT, Barrett-Lennard EG, Masters DG (2010) Sheep production, plant growth and nutritive value of a saltbush-based pasture system to rotational grazing or set stocking. Small Ruminant Research 91, 103–109.
| Sheep production, plant growth and nutritive value of a saltbush-based pasture system to rotational grazing or set stocking.Crossref | GoogleScholarGoogle Scholar |
Norman HC, Masters DG, Barrett-Lennard EG (2013) Halophytes as forages in saline landscapes: Interactions between plant genotype and environment change their feeding value to ruminants. Environmental Botany 92, 96–109.
| Halophytes as forages in saline landscapes: Interactions between plant genotype and environment change their feeding value to ruminants.Crossref | GoogleScholarGoogle Scholar |
O’Connell M, Young J, Kingwell RS (2006) The economic value of saltland pastures in a mixed farming system in Western Australia. Agricultural Systems 89, 371–389.
| The economic value of saltland pastures in a mixed farming system in Western Australia.Crossref | GoogleScholarGoogle Scholar |
Pannell DJ (1996) Lessons from a decade of whole-farm modelling in Western Australia. Review of Agricultural Economics 18, 373–383.
Pannell DJ, Bathgate A (1991) ‘MIDAS Eastern Wheatbelt Model. EWM1991.’ (Department of Agriculture, Western Australia: South Perth, W. Aust.)
Revell DK, Durmic Z, Bennell M, Sweeney GC, Vercoe PE (2008) The in situ use of plant mixtures including native shrubs in Australian grazing systems: the potential to capitalise on plant diversity for livestock health and productivity. In ‘Harvesting knowledge, farming opportunities’. (Eds JF Skaife, PE Vercoe) pp. 36–49. (Cambridge University Press: Cambridge, UK)
Robertson SM (2005) Managing sheep production from a changing feed base in the Mallee. Final Grain and Graze Report, June 2005. Department of Primary Industries, Victoria, Australia. Available at: www.msfp.org.au/grainandgrazepdf/sheep_production_changing_feed_base_mallee.pdf (accessed 20 October 2010).
Robertson MJ (2006) ‘Lucerne prospects: Drivers for widespread adoption of lucerne for profit and salinity management.’ (Cooperative Research Centre for Plant-based Management of Dryland Salinity: Perth, W. Aust.)
Robertson SM (2006a) Crop stubbles are as important for sheep production as annual pastures in the Victorian Mallee. Australian Journal of Experimental Agriculture 46, 993–1003.
| Crop stubbles are as important for sheep production as annual pastures in the Victorian Mallee.Crossref | GoogleScholarGoogle Scholar |
Robertson SM (2006b) Predicting pasture and sheep production in the Victorian Mallee with the decision support tool, GrassGro. Australian Journal of Experimental Agriculture 46, 1005–1014.
| Predicting pasture and sheep production in the Victorian Mallee with the decision support tool, GrassGro.Crossref | GoogleScholarGoogle Scholar |
Rural Solutions SA (2011) ‘Farm Gross Margin and Enterprise Planning Guide: A gross margin template for crop and livestock enterprises 2011.’ (Rural Solutions SA: Adelaide, S. Aust.)
Sadras V, Roget D, Krause M (2003) Dynamic cropping strategies for risk management in dry-land farming systems. Agricultural Systems 76, 929–948.
| Dynamic cropping strategies for risk management in dry-land farming systems.Crossref | GoogleScholarGoogle Scholar |
Thomas DT, Rintoul AJ, Masters DG (2007) Increasing dietary sodium chloride increases wool growth but decreases in vivo organic matter digestibility in sheep across a range of diets. Australian Journal of Agricultural Research 58, 1023–1030.
| Increasing dietary sodium chloride increases wool growth but decreases in vivo organic matter digestibility in sheep across a range of diets.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DC%2BD2sXhtlGrtLrJ&md5=1a01f44b97695a0be12cf90f6f052922CAS |
Young JM (1995) ‘MIDAS Great Southern Model. GSM1995: User’s manual.’ (Department of Agriculture, Western Australia: South Perth, W. Aust.)
