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Author (up) Ahmadi, B.V.; Shrestha, S.; Thomson, S.G.; Barnes, A.P.; Stott, A.W.
Title Health, welfare and profitability in Scottish sheep farms: assessing the impacts of CAP 2015 reforms Type Conference Article
Year 2014 Publication Abbreviated Journal
Volume Issue Pages
Keywords TradeM
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Area Expedition Conference 88th Annual Conference, Paris, France, 2014-04-09 to 2014-04-11
Notes Approved no
Call Number MA @ admin @ Serial 2275
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Author (up) Ahmadi, B.V.; Thomson, S.; Shrestha, S.; Stott, A.W.
Title Predicting the implications of CAP reform using a bio-economic modelling approach Type Conference Article
Year 2013 Publication Abbreviated Journal
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Keywords LiveM
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Area Expedition Conference 133rd EAAE seminar Developing Integrated and Reliable Modeling Tools for Agricultural and Environmental Policy Analysis, Crete, Greece, 2013-06-15 to 2013-06-16
Notes Approved no
Call Number MA @ admin @ Serial 2274
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Author (up) Özkan Gülzari, Ş.; Vosough Ahmadi, B.; Stott, A.W.
Title Impact of subclinical mastitis on greenhouse gas emissions intensity and profitability of dairy cows in Norway Type Journal Article
Year 2018 Publication Preventive Veterinary Medicine Abbreviated Journal Preventive Veterinary Medicine
Volume 150 Issue Pages 19-29
Keywords Dairy cow; Dynamic programming; Greenhouse gas emissions intensity; Profitability; Subclinical mastitis; Whole farm modelling
Abstract Impaired animal health causes both productivity and profitability losses on dairy farms, resulting in inefficient use of inputs and increase in greenhouse gas (GHG) emissions produced per unit of product (i.e. emissions intensity). Here, we used subclinical mastitis as an exemplar to benchmark alternative scenarios against an economic optimum and adjusted herd structure to estimate the GHG emissions intensity associated with varying levels of disease. Five levels of somatic cell count (SCC) classes were considered namely 50,000 (i.e. SCC50), 200,000, 400,000, 600,000 and 800,000 cells/mL (milliliter) of milk. The effects of varying levels of SCC on milk yield reduction and consequential milk price penalties were used in a dynamic programming (DP) model that maximizes the profit per cow, represented as expected net present value, by choosing optimal animal replacement rates. The GHG emissions intensities associated with different levels of SCC were then computed using a farm-scale model (HolosNor). The total culling rates of both primiparous (PP) and multiparous (MP) cows for the five levels of SCC scenarios estimated by the model varied from a minimum of 30.9% to a maximum of 43.7%. The expected profit was the highest for cows with SCC200 due to declining margin over feed, which influenced the DP model to cull and replace more animals and generate higher profit under this scenario compared to SCC50. The GHG emission intensities for the PP and MP cows with SCC50 were 1.01 kg (kilogram) and 0.95 kg carbon dioxide equivalents (CO2e) per kg fat and protein corrected milk (FPCM), respectively, with the lowest emissions being achieved in SCC50. Our results show that there is a potential to reduce the farm GHG emissions intensity by 3.7% if the milk production was improved through reducing the level of SCC to 50,000 cells/mL in relation to SCC level 800,000 cells/mL. It was concluded that preventing and/or controlling subclinical mastitis consequently reduces the GHG emissions per unit of product on farm that results in improved profits for the farmers through reductions in milk losses, optimum culling rate and reduced feed and other variable costs. We suggest that further studies exploring the impact of a combination of diseases on emissions intensity are warranted.
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ISSN 0167-5877 ISBN Medium
Area Expedition Conference
Notes LiveM, ft_macsur Approved no
Call Number MA @ admin @ Serial 5181
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Author (up) Özkan, Ş.; Ahmadi, B.V.; Bonesmo, H.; Østerås, O.; Stott, A.; Harstad, O.M.
Title Impact of animal health on greenhouse gas emissions Type Journal Article
Year 2015 Publication Advances in Animal Biosciences Abbreviated Journal Advances in Animal Biosciences
Volume 6 Issue 01 Pages 24-25
Keywords dairy; GHG emissions; cull rate; health; HolosNor
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Language English Summary Language Original Title
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ISSN 2040-4700 ISBN Medium Article
Area Expedition Conference
Notes LiveM, ft_macsur Approved no
Call Number MA @ admin @ Serial 4573
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Author (up) Özkan, S.; Ahmadi, B.V.; Bonesmo, H.S.; Østerås, O.; Stott, A.; Harstad, O.M.
Title Impact of animal health on greenhouse gas emissions in Norwegian dairying Type Conference Article
Year 2014 Publication Abbreviated Journal
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Keywords LiveM
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Area Expedition Conference International Livestock Modelling and Research Colloquium, Bilbao, Spain, 2014-10-14 to 2014-10-16
Notes Approved no
Call Number MA @ admin @ Serial 2694
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