Evaluating mob stocking for beef cattle in a temperate grassland


Autoři: Benjamin F. Tracy aff001;  Robert B. Bauer aff001
Působiště autorů: School of Plant and Environmental Sciences, Virginia Tech, Blacksburg, Virginia, United States of America aff001
Vyšlo v časopise: PLoS ONE 14(12)
Kategorie: Research Article
doi: 10.1371/journal.pone.0226360

Souhrn

Mob stocking is a type of livestock management method where high densities of animals are restricted to a small area of grassland for short periods of time (e.g., 12–24 hr.) before being moved to new forage. Use of mob stocking has generated considerable interest among forage-livestock professionals in recent years, but questions remain about its purported benefits to cattle and forage plants. To address questions about the possible benefits of mob stocking, a 3-yr study (2014–2016) was conducted in Virginia, USA comparing mob, rotational, and continuous stocking methods in a temperate grassland common to that region. The main objective of this study was to evaluate how mob-stocking management affected selected forage variables, cattle performance, and legume/weed abundance. Herbage mass and nutritive value were measured monthly. Cow and calf weights and body condition score (BCS) were used as indicators of animal performance. Legumes (red and white clover) were over-seeded prior to the study, and their abundance along with weeds were evaluated annually thereafter. Mean herbage mass and forage nutritive values were similar across mob, rotational and continuously stocked systems despite extra-long rest periods that allowed grasses to grow tall and over-mature under mob stocking. Cow weights going into winter were lower (P < 0.05) under mob stocking (619 kg) compared with continuous stocking (688 kg) possibly because many tall grasses were trampled and not grazed. Lastly, we found mob stocking can favor establishment of erect-growing red clover (Trifolium pretense L.), but it had no effect on weed abundance. Overall, we found few compelling reasons why mob stocking should be adopted for season-long forage and livestock production over other stocking methods in this environment.

Klíčová slova:

Cattle – Grasses – Grazing – Livestock – Livestock care – Seasons – Spring – Weeds


Zdroje

1. Allen VG, Batello C, Berretta EJ, Hodgson J, Kothmann M, Li X, et al. An international terminology for grazing lands and grazing animals. Grass and Forage Science. 2011;66(1):2–28.

2. Earl JM, Jones CE. The need for a new approach to grazing management—is cell grazing the answer? Rangeland Journal 1996; 18:327–50.

3. Jones CE, editor. Grazing management for healthy soils. Stipa Inaugural National Grasslands Conference ‘Better Pastures Naturally’; 2000; Mudgee, NSW Austrailia.

4. Volesky JD, Schacht WH, Redden MD, Lindsey T, Johnson J, editors. Grazing strategy effects on herbage utilization, production, and animal performance on Nebraska Sandhills Meadow. 2016 Proceedings of the 10th International Rangeland Congress 2016.

5. Savory A. Holistic resource management. Covelo, CA, USA: Island Press; 1988.

6. Bisinger JJ, Russell JR, Bear DA, J. Sellers, Offenburger H. Enhancing botanical composition and wildlife habitat of pastures in south central iowa through soil disturbance by mob-grazing of beef cattle 2014. Animal Industry Report: AS 660, ASL R2888.

7. Salatin J. An aggressive approach to controlled grazing: tall grass mob stocking. Acres USA 2008; Vol. 38, No. 5(No.5).

8. Tietz N. Mob Grazing Produces Prime Pastures. Hay and Forage Grower. 2011 Feb 2, 2011.

9. Bertelsen BS, Faulkner DB, Buskirk DD, Castree JW. Beef cattle performance and forage characteristics of continuous, 6-paddock, and 11-paddock grazing systems. J Anim Sci. 1993;71:1381–9. doi: 10.2527/1993.7161381x 8392043

10. Paine LK, Undersander D, Casler MD. Pasture growth, production, and quality under rotational and continuous grazing management. J Prod Agric 1999 12::569–77.

11. Briske DD, Derner JD, Brown JR, Fuhlendorf SD, Teague WR, Havstad KM, et al. Rotational grazing on rangelands: reconciliation of perception and experimental evidence. Rangeland Ecology and Management. 2008;61(1):3–17.

12. Oates LG, Balser TC, Jackson RD. Sub-humid pasture soil microbial communities affected by presence of grazing, but not grazing management. Applied Soil Ecology. 2012;59(0):20–8.

13. Shenk J, Workman J, Westerhaus M. Applications of NIR spectroscopy to agricultural products. In: Burns D, Ciurczak E, editors. Handbook of Near-Infrared Analysis. Boca Raton, FL: CRC Press; 2007. p. 348–82.

14. Eversole D, Browne M, Hall J, Dietz R. Body condition scoring beef cows. Virginia Cooperative Extension Publication. 400–791; 2009.

15. Daubenmire RF. A canopy-cover analysis of vegetation analysis. Northwest Science. 1959;33:43–6.

16. Tracy BF, Faulkner DB. Pasture and Cattle responses in rotationally stocked grazing systems sown with differing levels of species richness. Crop Sci. 2006;46(5):2062–8.

17. R. version 3.2.1 (2015-06-18) — "World-Famous Astronaut" Copyright (C) 2015 The R Foundation for Statistical Computing. 2015.

18. Belesky D, Fedders J. Defoliation effects on seasonal production and growth rate of cool-season grasses Agron J. 1994;86:38–45.

19. Ferraro DO, Oesterheld M. Effect of defoliation on grass growth. A quantitative review. Oikos. 2002;98(1):125–33.

20. Bryan WB, Prigge EC. Grazing initiation date and stocking rate effects on pasture productivity. Argon J. 1994;86(1):55–8.

21. Collins M, Fritz JO. Forage Quality. In: Barnes RF, Nelson CJ, Collins M, Moore KJ, editors. Forages: An Introduction to Grassland Agriculture. Volume I. 6th Edition ed. Ames, IA: Iowa State University Press; 2003. p. 363–91.

22. Bauer R. Mob stocking effects on herbage nutritive value, herbage accumulation, and plant species composition. MS Thesis. Blacksburg, Va.: Virginia Tech; 2015. https://www.semanticscholar.org/paper/Mob-stocking-effects-on-herbage-nutritive-value%2C-Bauer/24e30d1faf60300275b4acd540135906a1d0e7fb

23. Whetsell MS, Rayburn EB, Osborne PI. Evaluation in Appalachian pasture systems of the 1996 (update 2000) National Research Council model for weaning cattle. J Anim Sci. 2006;84(5):1265–70. doi: 10.2527/2006.8451265x 16612031

24. Jones GB, Tracy BF. Pasture soil and herbage nutrient dynamics through five years of rotational stocking. Crop Sci. 2014;54(5):2351–61.

25. Sollenberger LE, Vanzant ES. Interrelationships among forage nutritive value and quantity and individual animal performance. Crop Sci. 2011;51(2):420–32.

26. Walker JW, Heitschmidt RK, Dowhower SL. Some effects of a rotational grazing treatment on cattle preference for plant communities. J Range Manage. 1989;42:143–8.

27. Jung HG, Rice RW, Koong LJ. Comparison of heifer weight gains and forage quality for continuous and short-duration grazing systems. J Range Manage. 1985;38:144–8.

28. Janssen L, McMurtry B, Stockton M, Smart A, Clay S. An economic analysis of high-intensity, short-duration grazing systems in South Dakota and Nebraska. Selected paper 2015 Agricultural & Applied Economics Association and Western Agricultural Economics Association Annual Meeting; San Francisco, CA 2015.

29. Bartimus HL, Montgomery TG, Philipp D, Cater J, Coffey KP, Shanks BC. 118 Mob grazing effects on cattle performance in southeast Arkansas. J Anim Sci. 2016;94(suppl_2):55-.

30. Pavlů V, Hejcman M, Pavlů L, Gaisler J, Hejcmanová-Nežerková P, Meneses L. Changes in plant densities in a mesic species-rich grassland after imposing different grazing management treatments. Grass and Forage Science. 2006;61(1):42–51.

31. Black AD, Laidlaw AS, Moot DJ, O’Kiely P. Comparative growth and management of white and red clovers. Irish Journal of Agricultural and Food Research. 2009;48(2):149–66.

32. Zegler CH, Brink GE, Renz MJ, Ruark MD, Casler MD. Management Effects on Forage Productivity, Nutritive value, and legume persistence in rotationally grazed pastures. Crop Sci. 2018;58(6):2657–64.

33. Wiersma DW, Smith RR, Sharpee DK, Mlynarek MJ, Rand RE, Undersander DJ. Harvest Management effects on red clover forage yield, quality, and persistence. J Prod Agric. 1998;11(3):309–13.

34. Sheaffer CC, Miller DW, Marten GC. Grass dominance and mixture yield and quality in perennial grass-alfalfa mixtures. J Prod Agric. 1990;3(4):480–5.

35. Tracy BF, Schlueter DH, Flores JP. Conditions that favor clover establishment in permanent grass swards. Grassland Science. 2015;61(1):34–40.

36. Schlueter D, Tracy B. Sowing method effects on clover establishment into permanent pasture. Agron J. 2012;104(5):1217–22.


Článek vyšel v časopise

PLOS One


2019 Číslo 12