The multi-year cumulative effects of alternative stocking rate and grazing management practices on pasture productivity and utilization efficiency

Journal of Dairy Science
B McCarthyB Horan

Abstract

The production and utilization of increased quantities of high quality pasture is of paramount importance in pasture-based milk production systems. The objective of this study was to evaluate the cumulative effects of alternative integrated grazing strategies, incorporating alternative stocking rate (SR) and grazing severities, on pasture productivity and grazing efficiency over multiple years within farm systems using perennial ryegrass dominant pastures. Three whole-farm SR treatments were compared over 4 complete grazing seasons (2009 to 2012 inclusive): low (2.51 cows/ha; LSR), medium (2.92 cows/ha; MSR), and high (3.28 cows/ha; HSR). Each system had its own farmlet containing 18 paddocks and remained on the same treatment for the duration of the study. Stocking rate had a significant effect on all grazing variables with the exception of soil fertility status and sward density. Increased SR resulted in increased total annual net pasture accumulation, improved sward nutritive value, and increased grazed pasture utilization. Total annual net pasture accumulation was greatest in HSR [15,410kg of dry matter (DM)/ha], intermediate for MSR (14,992kg of DM/ha), and least for LSR (14,479kg of DM/ha) during the 4-yr study period. A ...Continue Reading

References

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Oct 4, 2012·Animal : an International Journal of Animal Bioscience·J L Peyraud, R Delagarde
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Citations

Nov 21, 2017·Journal of Dairy Science·J R RocheK L Macmillan
Nov 26, 2020·Animals : an Open Access Journal From MDPI·Jessica G PollockDeborah A McConnell

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