Better management of intensive rotational grazing systems maintains pastures and improves animal performance
W. Badgery A C , G. Millar A , K. Broadfoot A , J. Martin A , D. Pottie A , A. Simmons A and P. Cranney B
+ Author Affiliations
- Author Affiliations
A NSW Department of Primary Industries, Orange Agricultural Institute, 1447 Forest Road, Orange, NSW 2800, Australia.
B Central Tablelands Local Land Services, Orange Agricultural Institute, 1447 Forest Road, Orange, NSW 2800, Australia.
C Corresponding author. Email: warwick.badgery@dpi.nsw.gov.au
Crop and Pasture Science 68(12) 1131-1140 https://doi.org/10.1071/CP16396
Submitted: 21 October 2016 Accepted: 11 May 2017 Published: 4 July 2017
Abstract
Grazing management has been identified as a means of increasing livestock production and improving the composition of perennial pastures. The benefits of intensive rotational grazing have been the subject of much debate, but few studies have evaluated contrasting management of intensive rotational systems. A grazing management experiment was established on a pasture with cocksfoot (Dactylis glomerata L., varieties Porto and Kara) as the dominant species, to investigate different stocking rates, paddock numbers and rotation speeds, and a flexible treatment that adjusted grazing time, rest periods and stock numbers for optimal pasture utilisation. Data were collected on pasture composition and diet quality assessed by using faecal analysis, animal weight changes and pasture characteristics. Animal production per hectare was greatest for fast rotations (56 days’ rest) at high stocking rates (HStR, 13.6 dry sheep equivalents (DSE) ha–1), but continuous grazing (CG) was equally productive. Although flexible grazing based on the 3–4-leaf stage was proposed as the best balance between pasture production and quality, this treatment had lower stocking rates (9.2 DSE ha–1) and was not as productive. No treatment negatively affected pasture composition over the 4-year period. Area of bare ground was highest for the HStR CG treatment; however, the 30-paddock rotations were able to limit bare ground at the same stocking rate. The results indicated that intensive rotational grazing could be effectively managed by using green herbage allowance. In spring, green herbage allowance needed to be 1–1.5 kg green dry matter (DM) DSE–1 day–1, which increased to 5 kg green DM DSE–1 day–1 as the quality of green DM decreased, to allow selective grazing to enhance diet quality.
Additional keywords: grazing benchmarks, holistic grazing, pasture utilization.
References
Allan CJ, Mason WK, Reeve IJ, Hooper S (2003) Evaluation of the impact of SGS on livestock producers and their practices. Australian Journal of Experimental Agriculture 43, 1031–1040.| Evaluation of the impact of SGS on livestock producers and their practices.Crossref | GoogleScholarGoogle Scholar |
Badgery WB, Millar GD, Broadfoot K, Michalk DL, Cranney P, Mitchell D, Van de Ven R (2017a) Increased production and cover in a variable native pasture following intensive grazing management. Animal Production Science 57,
| Increased production and cover in a variable native pasture following intensive grazing management.Crossref | GoogleScholarGoogle Scholar |
Badgery WB, Millar GD, Michalk DM, Cranney P, Broadfoot K (2017b) The intensity of grazing management influences lamb production from native grassland. Animal Production Science 57,
| The intensity of grazing management influences lamb production from native grassland.Crossref | GoogleScholarGoogle Scholar |
Beukes PC, Lee JM, Lancaster JAS, Roche JR (2006) Modelling the impact of changing the decision to graze from rotation length to ryegrass leaf-stage. Proceedings of the New Zealand Grassland Association 68, 275–281.
Chapman DF, McCaskill MR, Quigley PE, Thompson AN, Graham JF, Borg D, Lamb J, Kearney G, Saul GR, Clark SG (2003) Effects of grazing method and fertiliser inputs on the productivity and sustainability of phalaris-based pastures in Western Victoria. Australian Journal of Experimental Agriculture 43, 785–798.
| Effects of grazing method and fertiliser inputs on the productivity and sustainability of phalaris-based pastures in Western Victoria.Crossref | GoogleScholarGoogle Scholar |
Chapman DF, Cullen BR, Johnson IR, Beca D (2009) Interannual variation in pasture growth rate in Australian and New Zealand dairy regions and its consequences for system management. Animal Production Science 49, 1071–1079.
| Interannual variation in pasture growth rate in Australian and New Zealand dairy regions and its consequences for system management.Crossref | GoogleScholarGoogle Scholar |
Chapman DF, Rawnsley RP, Cullen BR, Clark DA (2013) Inter-annual variability in pasture herbage accumulation in temperate dairy regions: causes, consequences, and management tools. In ‘Proceedings 22nd International Grassland Congress’. Sydney. Vol. 1. (Eds D Michalk, G Millar, W Badgery, K Broadfoot) pp. 798–805. (NSW DPI: Orange, NSW)
Cox F, Badgery W, Kemp D, Krebs G (2017) Seasonal diet selection by ewes grazing within contrasting grazing systems. Animal Production Science 57,
| Seasonal diet selection by ewes grazing within contrasting grazing systems.Crossref | GoogleScholarGoogle Scholar |
Dorrough J, Ash J, McIntyre S (2004) Plant responses to livestock grazing frequency in an Australian temperate grassland. Ecography 27, 798–810.
| Plant responses to livestock grazing frequency in an Australian temperate grassland.Crossref | GoogleScholarGoogle Scholar |
Freer M, Dove H, Nolan JV (2007) ‘Nutrient requirements of domesticated ruminants.’ (CSIRO Publishing: Melbourne)
Fulkerson WJ (1994) Effect of redefoliation on the regrowth and water soluble carbohydrate content of Lolium perenne. Australian Journal of Agricultural Research 45, 1809–1815.
| Effect of redefoliation on the regrowth and water soluble carbohydrate content of Lolium perenne.Crossref | GoogleScholarGoogle Scholar |
Fulkerson WJ, Donaghy DJ (2001) Plant-soluble carbohydrate reserves and senescence – key criteria for developing an effective grazing management system for ryegrass-based pastures: a review. Australian Journal of Experimental Agriculture 41, 261–275.
| Plant-soluble carbohydrate reserves and senescence – key criteria for developing an effective grazing management system for ryegrass-based pastures: a review.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DC%2BD3MXjslKltbo%3D&md5=dd41a3f51be1e7b12c300b68f15c9cdbCAS |
Fulkerson WJ, Slack K (1994) Leaf number as a criterion for determining defoliation time for Lolium perenne. 1. Effect of water-soluble carbohydrates and senescence. Grass and Forage Science 49, 373–377.
| Leaf number as a criterion for determining defoliation time for Lolium perenne. 1. Effect of water-soluble carbohydrates and senescence.Crossref | GoogleScholarGoogle Scholar |
Fulkerson WJ, Slack K (1995) Leaf number as a criterion for determining defoliation time for Lolium perenne. 2. Effect of defoliation frequency and height. Grass and Forage Science 50, 16–20.
| Leaf number as a criterion for determining defoliation time for Lolium perenne. 2. Effect of defoliation frequency and height.Crossref | GoogleScholarGoogle Scholar |
Hinch GN, Hoad J, Lollback M, Hatcher S, Marchant R, Colvin A, Scott JM, Mackay D (2013) Livestock weights in response to three whole-farmlet management systems. Animal Production Science 53, 727–739.
| Livestock weights in response to three whole-farmlet management systems.Crossref | GoogleScholarGoogle Scholar |
Isbell RF (2002) ‘The Australian Soil Classification.’ (CSIRO Publishing: Melbourne)
Jeffrey SJ, Carter JO, Moodie KM, Beswick AR (2001) Using spatial interpolation to construct a comprehensive archive of Australian climate. Environmental Modelling & Software 16, 309–330.
| Using spatial interpolation to construct a comprehensive archive of Australian climate.Crossref | GoogleScholarGoogle Scholar |
Kaine G, Doyle B, Sutherland H, Scott JM (2013) Surveying the management practices and research needs of graziers in the New England region of New South Wales. Animal Production Science 53, 602–609.
| Surveying the management practices and research needs of graziers in the New England region of New South Wales.Crossref | GoogleScholarGoogle Scholar |
Kemp DR, Dowling PM (2000) Towards sustainable temperate perennial pastures. Australian Journal of Experimental Agriculture 40, 125–132.
| Towards sustainable temperate perennial pastures.Crossref | GoogleScholarGoogle Scholar |
Laca EA (2009) New approaches and tools for grazing management. Rangeland Ecology and Management 62, 407–417.
| New approaches and tools for grazing management.Crossref | GoogleScholarGoogle Scholar |
Leigh JH, Holgate MD (1978) Effects of pasture availability on the composition and quality of the diet selected by sheep grazing native, degenerate and improved pastures in the Upper Shoalhaven Valley, New South Wales. Australian Journal of Experimental Agriculture and Animal Husbandry 18, 381–390.
| Effects of pasture availability on the composition and quality of the diet selected by sheep grazing native, degenerate and improved pastures in the Upper Shoalhaven Valley, New South Wales.Crossref | GoogleScholarGoogle Scholar |
McCosker T (2000) Cell grazing—the first 10 years in Australia. Tropical Grasslands 34, 207–218.
McIvor J (2013) ‘HRM and cell grazing: A review of the evidence base.’ (Meat & Livestock Australia Limited: North Sydney)
Nie ZN, Zollinger RP, Jacobs JL (2009) Performance of 7 Australian native grasses from the temperate zone under a range of cutting and fertiliser regimes. Crop & Pasture Science 60, 943–953.
| Performance of 7 Australian native grasses from the temperate zone under a range of cutting and fertiliser regimes.Crossref | GoogleScholarGoogle Scholar |
Payne R, Murray D, Harding S, Baird D, Soutar D (2013) ‘Introduction to GenStat® for WindowsTM.’ 16th edn (VSN International: Hemel Hempstead, UK)
R Core Team (2015) R: A language and environment for statistical computing. R Foundation for Statistical Computing, Vienna. Available at: www.R-project.org/.
Rawnsley RP, Donaghy DJ, Fulkerson WJ, Lane PA (2002) Changes in the physiology and feed quality of cocksfoot (Dactylis glomerata L.) during regrowth. Grass and Forage Science 57, 203–211.
| Changes in the physiology and feed quality of cocksfoot (Dactylis glomerata L.) during regrowth.Crossref | GoogleScholarGoogle Scholar |
Savory A (1988) ‘Holistic resource management.’ (Island Press: Washington, DC)
Sheath GW, Clark DA (1996) Management of grazing systems: temperate pastures. In ‘The ecology and management of grazing systems’. (Eds J Hodgson, AW Illius) pp. 301–325. (CAB International: Wallingford, UK)
Sollenberger LE, Moore JE, Allen VG, Pedreira CGS (2005) Reporting forage allowance in grazing experiments. Crop Science 45, 896–900.
| Reporting forage allowance in grazing experiments.Crossref | GoogleScholarGoogle Scholar |
Tothill JC, Hargraves JNG, Jones RM (1992) BOTANAL—a comprehensive sampling and computing procedure for estimating pasture yield and composition. I. Field sampling. CSIRO Australian Division of Tropical Crops and Pastures, Tropical Agronomy Technical Memorandum No. 78.
Turner LR, Donaghy DJ, Lane PA, Rawnsley RP (2006) Effect of defoliation management, based on leaf stage, on perennial ryegrass (Lolium perenne L.), prairie grass (Bromus willdenowii Kunth.) and cocksfoot (Dactylis glomerata L.) under dryland conditions. 1. Regrowth, tillering and water-soluble carbohydrate concentration. Grass and Forage Science 61, 164–174.
| Effect of defoliation management, based on leaf stage, on perennial ryegrass (Lolium perenne L.), prairie grass (Bromus willdenowii Kunth.) and cocksfoot (Dactylis glomerata L.) under dryland conditions. 1. Regrowth, tillering and water-soluble carbohydrate concentration.Crossref | GoogleScholarGoogle Scholar |
Vallentine JF (2001) ‘Grazing management.’ (Academic Press: San Diego, CA)
Wang CJ, Tas BM, Glindemann T, Rave G, Schmidt L, Weißbach F, Susenbeth A (2009) Fecal crude protein content as an estimate for the digestibility of forage in grazing sheep. Animal Feed Science and Technology 149, 199–208.
| Fecal crude protein content as an estimate for the digestibility of forage in grazing sheep.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DC%2BD1MXisVOksr0%3D&md5=55df7d3fa9ae9b9e9359c15294e0269bCAS |
Warn LK, Frame HR, McLarty GR (2002) Effects of grazing method and soil fertility on stocking rate and wool production. Wool Technology and Sheep Breeding 50, 510–517.
Zhang XQ, Luo HL, Hou XY, Badgery WB, Zhang YJ, Jiang C (2014) Effect of restricted time at pasture and indoor supplementation on ingestive behaviour, dry matter intake and weight gain of growing lambs. Livestock Science 167, 137–143.
| Effect of restricted time at pasture and indoor supplementation on ingestive behaviour, dry matter intake and weight gain of growing lambs.Crossref | GoogleScholarGoogle Scholar |
Zhang YJ, Huang D, Badgery WB, Kemp DR, Chen WQ, Wang XY, Liu N (2015) Reduced grazing pressure delivers production and environmental benefits for the typical steppe of north China. Scientific Reports 5, 16434
| Reduced grazing pressure delivers production and environmental benefits for the typical steppe of north China.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DC%2BC2MXhvVWmsrnO&md5=1ed7558a24cf4d770a986dda487013a8CAS |
