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The concordance between greenhouse gas emissions, livestock production and profitability of extensive beef farming systems

Citation

Harrison, MT and Cullen, BR and Tomkins, NW and McSweeney, C and Cohn, P and Eckard, RJ, The concordance between greenhouse gas emissions, livestock production and profitability of extensive beef farming systems, Animal Production Science, 56, (3) pp. 370-384. ISSN 1836-0939 (2016) [Refereed Article]

Copyright Statement

Copyright CSIRO 2016

DOI: doi:10.1071/AN15515

Abstract

Here we examine the concordance among emissions, production and gross margins of extensive beef farming systems by modelling a range of scenarios for herd management, animal genotype and pasture nutritive quality. We based our simulations on a case-study farm in central Queensland, Australia, and studied the influence of interventions designed for emissions mitigation, increasing productivity, or increasing gross margin. Interventions included replacing urea supplementation with nitrate, finishing cattle on the perennial forage leucaena (L), herd structure optimisation (HO), higher female fecundity (HF), and a leucaena finishing enterprise that had net farm emissions equal to the baseline (leucaena equal emissions; LEE). The HO intervention reduced the ratio of breeding cows relative to steers and unmated heifers, and lowered the ratio of costs to net cattle sales. Gross margin of the baseline, nitrate, L, LEE, HO and HF scenarios were AU$146 000, AU$91 000, AU$153 000, AU$170 000, AU$204 000 and AU$216 000, respectively. Enterprises with early joining of maiden heifers as well as HO and HF further increased gross margin (AU$323 000), while systems incorporating all compatible interventions (HO, HF, early joining, LEE) had a gross margin of AU$315 000. We showed that interventions that increase liveweight turnoff while maintaining net farm emissions resulted in higher gross margins than did interventions that maintained liveweight production and reduced net emissions. A key insight of this work was that the relationship between emissions intensity (emissions per unit liveweight production) or liveweight turnoff with gross margin were negative and positive, respectively, but only when combinations of (compatible) interventions were included in the dataset. For example, herd optimisation by reducing the number of breeding cows and increasing the number of sale animals increased gross margin by 40%, but this intervention had little effect on liveweight turnoff and emissions intensity. However, when herd optimisation was combined with other interventions that increased production, gross margins increased and emissions intensity declined. This is a fortuitous outcome, since it implies that imposing more interventions with the potential to profitably enhance liveweight turnoff allows a greater reduction in emissions intensity, but only when each intervention works synergistically with those already in place.

Item Details

Item Type:Refereed Article
Keywords:greenhouse gas, sheep, beef, dairy, emissions intensity, mitigation, livestock, production
Research Division:Agricultural and Veterinary Sciences
Research Group:Agriculture, Land and Farm Management
Research Field:Agricultural Systems Analysis and Modelling
Objective Division:Animal Production and Animal Primary Products
Objective Group:Environmentally Sustainable Animal Production
Objective Field:Management of Greenhouse Gas Emissions from Animal Production
Author:Harrison, MT (Dr Matthew Harrison)
ID Code:106439
Year Published:2016
Web of Science® Times Cited:4
Deposited By:Tasmanian Institute of Agriculture
Deposited On:2016-02-10
Last Modified:2017-11-02
Downloads:0

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