Forage and grain yield of grazed or defoliated spring and winter cereals in a winter-dominant, low-rainfall environment
Alison. J. Frischke A C , James R. Hunt B , Dannielle K. McMillan A and Claire J. Browne AA BCG, PO Box 85, Birchip, Vic. 3483, Australia.
B CSIRO Agriculture Flagship, GPO Box 1600, Canberra, ACT 2601, Australia.
C Corresponding author. Email: alison@bcg.org.au
Crop and Pasture Science 66(4) 308-317 https://doi.org/10.1071/CP14273
Submitted: 18 August 2014 Accepted: 2 March 2015 Published: 31 March 2015
Abstract
In the Mallee region of north-western Victoria, Australia, there is very little grazing of crops that are intended for grain production. The success of dual-purpose crops in other regions in south-eastern Australia with higher and more evenly distributed rainfall has driven interest in assessing the performance of dual-purpose cereals in the region. Five experiments were established in five consecutive years (2009–13) in the southern Mallee to measure the forage production and grain yield and quality response in wheat and barley to grazing by sheep or mechanical defoliation. The first three experiments focused on spring cultivars sown from late April to June, and the last two on winter cultivars planted from late February to early March. Cereal crops provided early and nutritious feed for livestock, with earlier sowing increasing the amount of dry matter available for winter grazing, and barley consistently produced more dry matter at the time of grazing or defoliation than wheat. However, the grain-production response of cereals to grazing or defoliation was variable and unpredictable. Effects on yield varied from –0.7 to +0.6 t/ha, with most site × year × cultivar combinations neutral (23) or negative (14), and few positive (2). Changes in grain protein were generally consistent with yield dilution effects. Defoliation increased the percentage of screenings (grains passing a 2-mm sieve) in three of five experiments. Given the risk of reduced grain yield and quality found in this study, and the importance of grain income in determining farm profitability in the region, it is unlikely that dual-purpose use of current cereal cultivars will become widespread under existing grazing management guidelines for dual-purpose crops (i.e. that cereal crops can be safely grazed once anchored, until Zadoks growth stage Z30, without grain yield penalty). It was demonstrated that early-sown winter wheat cultivars could produce more dry matter for grazing (0.4–0.5 t/ha) than later sown spring wheat and barley cultivars popular in the region (0.03–0.21 t/ha), and development of regionally adapted winter cultivars may facilitate adoption of dual-purpose cereals on mixed farms.
Additional keywords: barley, grazing, vernalisation, wheat.
References
ABARES (2014) Farm survey data. Australian Bureau of Agricultural and Resource Economics and Sciences. Available at: www.daff.gov.au/abares/pages/surveys.aspx (accessed 15 August 2014).Bell LW, Moore AD (2012) Integrated crop–livestock systems in Australian agriculture: Trends, drivers and implications. Agricultural Systems 111, 1–12.
| Integrated crop–livestock systems in Australian agriculture: Trends, drivers and implications.Crossref | GoogleScholarGoogle Scholar |
Bell LW, Hargreaves JNG, Lawes RA, Robertson MJ (2009) Sacrificial grazing of wheat crops: identifying tactics and opportunities in Western Australia’s grainbelt using simulation approaches. Animal Production Science 49, 797–806.
| Sacrificial grazing of wheat crops: identifying tactics and opportunities in Western Australia’s grainbelt using simulation approaches.Crossref | GoogleScholarGoogle Scholar |
Bell LW, Lilley JM, Hunt JR, Kirkegaard JA (2015) Optimising grain yield and grazing potential of crops across Australia’s high-rainfall zone: a simulation analysis. 1. Wheat. Crop & Pasture Science 66, 332–348.
Cai W, Cowan T, Thatcher M (2012) Rainfall reductions over Southern Hemisphere semi-arid regions: the role of subtropical dry zone expansion. Scientific Reports 2,
| Rainfall reductions over Southern Hemisphere semi-arid regions: the role of subtropical dry zone expansion.Crossref | GoogleScholarGoogle Scholar | 23050086PubMed |
Cooke JW, MacLennan HS, Erlandsen SA (1989) Arable farming systems. In ‘Mediterranean landscapes in Australia: Mallee ecosystems and their management’. (Eds JC Noble, RA Bradstock) pp. 318–328. (CSIRO: Melbourne)
Dove H, Kirkegaard JA (2014) Using dual-purpose crops in sheep-grazing systems. Journal of the Science of Food and Agriculture 94, 1276–1283.
| Using dual-purpose crops in sheep-grazing systems.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DC%2BC2cXht1ygsLs%3D&md5=e5396dcaf916cf7ee15915a02e4f4f50CAS | 24323974PubMed |
Dove H, Kelman WM, Kirkegaard JA, Sprague SJ (2012) Impact of magnesium-sodium supplementation on liveweight gains of young sheep grazing dual-purpose cereal or canola crops. Animal Production Science 52, 1027–1035.
| Impact of magnesium-sodium supplementation on liveweight gains of young sheep grazing dual-purpose cereal or canola crops.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DC%2BC38XhsVCgtbrO&md5=9dba0fde2aa04dd91a49f7a456a37952CAS |
Eagles HA, Cane K, Vallance N (2009) The flow of alleles of important photoperiod and vernalisation genes through Australian wheat. Crop & Pasture Science 60, 646–657.
| The flow of alleles of important photoperiod and vernalisation genes through Australian wheat.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DC%2BD1MXosVymtbo%3D&md5=1f14d720c837a465f05f2cef819eb6d0CAS |
Eagles HA, Cane K, Kuchel H, Hollamby GJ, Vallance N, Eastwood RF, Gororo NN, Martin PJ (2010) Photoperiod and vernalization gene effects in southern Australian wheat. Crop & Pasture Science 61, 721–730.
| Photoperiod and vernalization gene effects in southern Australian wheat.Crossref | GoogleScholarGoogle Scholar |
Harrison MT, Evans JR, Dove H, Moore AD (2011) Dual-purpose cereals: can the relative influences of management and environment on crop recovery and grain yield be dissected? Crop & Pasture Science 62, 930–946.
| Dual-purpose cereals: can the relative influences of management and environment on crop recovery and grain yield be dissected?Crossref | GoogleScholarGoogle Scholar |
Harrison MT, Evans JR, Moore AD (2012) Using a mathematical framework to examine physiological changes in winter wheat after livestock grazing. 2. Model validation and effects of grazing management. Field Crops Research 136, 127–137.
| Using a mathematical framework to examine physiological changes in winter wheat after livestock grazing. 2. Model validation and effects of grazing management.Crossref | GoogleScholarGoogle Scholar |
Hochman Z, Van Rees H, Carberry PS, Hunt JR, McCown RL, Gartmann A, Holzworth D, Van Rees S, Dalgliesh NP, Long W, Peake AS, Poulton PL (2009) Re-inventing model-based decision support with Australian dryland farmers: 4. Yield Prophet® helps farmers monitor and manage crops in a variable climate. Crop & Pasture Science 60, 1057–1070.
| Re-inventing model-based decision support with Australian dryland farmers: 4. Yield Prophet® helps farmers monitor and manage crops in a variable climate.Crossref | GoogleScholarGoogle Scholar |
Hochman Z, Gobbet D, Holzworth D, McClelland TI, van Rees H, Marinoni O, Navarro Garcia J, Horan H (2012) Quantifying yield gaps in rainfed cropping systems: A case study of wheat in Australia. Field Crops Research 136, 85–96.
| Quantifying yield gaps in rainfed cropping systems: A case study of wheat in Australia.Crossref | GoogleScholarGoogle Scholar |
Kelman WM, Dove H (2009) Growth and phenology of winter wheat and oats in a dual-purpose management system. Crop & Pasture Science 60, 921–932.
| Growth and phenology of winter wheat and oats in a dual-purpose management system.Crossref | GoogleScholarGoogle Scholar |
Kirkegaard JA, Hunt JR, McBeath TM, Lilley JM, Moore A, Verburg K, Robertson M, Oliver Y, Ward PR, Milroy S, Whitbread AM (2014) Improving water productivity in the Australian Grains industry—a nationally coordinated approach. Crop & Pasture Science 65, 583–601.
| Improving water productivity in the Australian Grains industry—a nationally coordinated approach.Crossref | GoogleScholarGoogle Scholar |
Latta RA (2015) Performance of spring cereal genotypes under defoliation on the Eyre Peninsula, South Australia. Crop & Pasture Science 66, 301–307.
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 AustraliaCrossref | GoogleScholarGoogle Scholar |
McDonald GK, Taylor JD, Verbyla A, Kuchel H (2012) Assessing the importance of subsoil constraints to yield of wheat and its implications for yield improvement. Crop & Pasture Science 63, 1043–1065.
| Assessing the importance of subsoil constraints to yield of wheat and its implications for yield improvement.Crossref | GoogleScholarGoogle Scholar |
Moore AD (2009) Opportunities and trade-offs in dual-purpose cereals across the southern Australian mixed-farming zone: a modelling study. Animal Production Science 49, 759–768.
| Opportunities and trade-offs in dual-purpose cereals across the southern Australian mixed-farming zone: a modelling study.Crossref | GoogleScholarGoogle Scholar |
Pook M, Lisson S, Risbey J, Ummenhofer CC, McIntosh P, Rebbeck M (2009) The autumn break for cropping in southeast Australia: trends, synoptic influences and impacts on wheat yield. International Journal of Climatology 29, 2012–2026.
| The autumn break for cropping in southeast Australia: trends, synoptic influences and impacts on wheat yield.Crossref | GoogleScholarGoogle Scholar |
Radcliffe JC, Dove H, McGrath D, Martin PJ, Wolfe EC (2012) Review of the use and potential for dual purpose crops. GRDC, Barton, ACT. Available at: https://publications.csiro.au/rpr/download?pid=csiro:EP124204&dsid=DS1 (accessed 23 February 2014)
Robertson S (2001) BCG Sheep Survey 2001—Summary of results for the 2000 growing season. Birchip Cropping Group, Birchip, Vic. Available at: www.bcg.org.au/members/public_resource_details.php?resource_id=2019 (accessed 15 August 2014)
Sadras VO, Lawson C (2011) Genetic gain in yield and associated changes in phenotype, trait plasticity and competitive ability of South Australian wheat varieties released between 1958 and 2007. Crop & Pasture Science 62, 533–549.
| Genetic gain in yield and associated changes in phenotype, trait plasticity and competitive ability of South Australian wheat varieties released between 1958 and 2007.Crossref | GoogleScholarGoogle Scholar |
Simmonds DH (1989) ‘Wheat and wheat quality in Australia.’ (CSIRO: Melbourne)
Thomas DT, Finlayson J, Moore AD, Robertson MJ (2010) Profitability of grazing crop stubbles may be overestimated by using the metabolisable energy intake from the stubble. Animal Production Science 50, 699–704.
| Profitability of grazing crop stubbles may be overestimated by using the metabolisable energy intake from the stubble.Crossref | GoogleScholarGoogle Scholar |
van Rees H, McClelland T, Hochman Z (2015) Leading farmers have closed the yield gap—what are the implications for productivity growth? In ‘GRDC Research Update for Advisors’. 24–25 February 2015, Ballarat, Vic., Australia. (GRDC: Barton, ACT) Available at: www.grdc.com.au/Research-and-Development/GRDC-Update-Papers/2015/02/Leading-farmers-have-closed-the-yield-gap (accessed 25 February 2015)
Virgona JM, Gummer FAJ, Angus JF (2006) Effects of grazing on wheat growth, yield, development, water use, and nitrogen use. Australian Journal of Agricultural Research 57, 1307–1319.
| Effects of grazing on wheat growth, yield, development, water use, and nitrogen use.Crossref | GoogleScholarGoogle Scholar |
Zadoks JC, Chang TT, Konzak CF (1974) A decimal code for the growth stages of cereals. Weed Research 14, 415–421.
| A decimal code for the growth stages of cereals.Crossref | GoogleScholarGoogle Scholar |
