Development of a software model to estimate daily greenhouse gas emissions of pasture-fed ruminant farming systems
J. A. Sise A C , J. I. Kerslake A , M. J. Oliver A , S. Glennie A , D. Butler B , M. Behrent B , P. F. Fennessy A and A. W. Campbell A
+ Author Affiliations
- Author Affiliations
A AbacusBio Limited, PO Box 5585, Dunedin 9058, New Zealand.
B Alliance Group Limited, PO Box 845, Invercargill 9840, New Zealand.
C Corresponding author. Email: jsise@abacusbio.co.nz
Animal Production Science 51(1) 60-70 https://doi.org/10.1071/AN10072
Submitted: 12 May 2010 Accepted: 4 September 2010 Published: 15 December 2010
Abstract
A software model has been developed to estimate greenhouse gas emissions of pasture-fed ruminant farming systems. The model estimates on-farm emissions associated with livestock (sheep and beef), fertiliser, petrol, diesel and electricity. Carbon sequestration from native and exotic forestry is then included to produce an on-farm carbon footprint, in the form of carbon dioxide equivalents. This paper describes the livestock model, which has been designed to record the movement of animals within individual farm units according to defined livestock classes. Allowances are made for unrecorded deaths, by estimating the number of animals missing within a defined time period and spreading the deaths according to expected seasonal variation in mortality. The enteric methane and nitrous oxide emissions are predicted using a combination of customised growth and lactation curves, and internationally recognised formulae to predict nutrient energy requirements. Customised growth and lactation curves allow estimation of liveweights and energy requirements associated with maintenance, growth, pregnancy and lactation on a daily basis. Daily estimation of emissions reduces errors introduced by monthly or seasonal averaging of livestock numbers and liveweights. The model has been developed into a commercial application (Alliance Group hoofprint) for use by New Zealand sheep and beef farmers, and could be adapted for other international livestock farming operations.
References
Amer PR, Kemp RA, Smith C (1992) Genetic differences among the predominant beef cattle breeds in Canada: an analysis of published results. Canadian Journal of Animal Science 72, 759–771.| Genetic differences among the predominant beef cattle breeds in Canada: an analysis of published results.Crossref | GoogleScholarGoogle Scholar |
Amer PR, McEwan JC, Dodds KG, Davis GH (1999) Economic values for ewe prolificacy and lamb survival in New Zealand sheep. Livestock Production Science 58, 75–90.
| Economic values for ewe prolificacy and lamb survival in New Zealand sheep.Crossref | GoogleScholarGoogle Scholar |
Carran RA, Theobald PW, Evans JP (1995) Emission of nitrous oxide from some grazed pasture soils in New Zealand. Australian Journal of Soil Research 33, 341–352.
| Emission of nitrous oxide from some grazed pasture soils in New Zealand.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DyaK2MXmtFWrt74%3D&md5=7d1dd8ee5f6477d958a3dcc3c67559b5CAS |
Clark H (2008) Guideline to accompany computerised inventory. Report for the Ministry of Agriculture and Forestry, Wellington, New Zealand.
Clarke AM, Drennan MJ, McGee M, Kenny DA, Evans RD, Berry DP (2009) Intake, growth and carcass traits in male progeny of sires differing in genetic merit for beef production. Animal 3, 791–801.
Cruickshank GJ, Thomson BC, Muir PD (2008) Modelling management change on production efficiency and methane output within a sheep flock. Report to the Ministry of Agriculture and Fisheries, Wellington, New Zealand.
de Klein CAM, Barton L, Sherlock RR, Li Z, Littlejohn RP (2003) Estimating a nitrous oxide emission factor for animal urine from some New Zealand pastoral soils. Australian Journal of Soil Research 41, 381–399.
| Estimating a nitrous oxide emission factor for animal urine from some New Zealand pastoral soils.Crossref | GoogleScholarGoogle Scholar |
de Klein CAM, Pinares-Patino C, Waghorn GC (2009) Greenhouse gas emissions. In ‘Environmental impacts of pasture-based farming’. (Ed. RE McDowell) pp. 1–33. (CABI Publishing: Oxfordshire, UK)
Energy Information and Modelling Group (2010) ‘New Zealand energy greenhouse gas emissions.’ (Ministry of Economic Development: Wellington, New Zealand) Available at http://www.med.govt.nz/templates/StandardSummary____10370.aspx [Verified 1 November 2010]
Fleming PH (2003) ‘Farm technical manual. Lincoln University.’ (The Caxton Press: Christchurch, New Zealand)
Freer M, Dove H, Nolan JV (2007) Energy. In ‘Nutrient requirements for domesticated animals’. (Eds M Freer, H Dove, JV Nolan) pp. 1–67. (CSIRO Publishing: Melbourne)
Hickson RE, Lopez-Villalobos N, Kenyon PR, Morris ST (2009) Effect of liveweight gain of pregnant 15-month-old Angus heifers on the milk intake of their first calves and the liveweight of their first and second calves. Animal Production Science 49, 112–120.
| Effect of liveweight gain of pregnant 15-month-old Angus heifers on the milk intake of their first calves and the liveweight of their first and second calves.Crossref | GoogleScholarGoogle Scholar |
Hodgson J, Brookes IM (2007) Nutrition of grazing animals. In ‘New Zealand pasture and crop science’. (Eds J White, J Hodgson) pp. 117–133. (Oxford University Press: Melbourne)
Holmes CW, Sykes AR (1984) Shelter and climatic effects on livestock. Reports of the National Shelter Working Party, Ministry of Works and Development, Wellington, New Zealand.
IPCC (2006a) Emissions from livestock and manure management. In ‘Guidelines for National Greenhouse Gas Inventories: Volume 4: agriculture, forestry and land use’. (The Institute for Global Environmental Strategies: Hayama, Japan) Available at http://www.ipcc-nggip.iges.or.jp/public/2006gl/vol2004.htm [Verified 1 November 2010]
IPCC (2006b) N2O emissions from managed soils, and CO2 emissions from lime and urea application. In ‘IPCC Guidelines for National Greenhouse Gas Inventories: Volume 4: agriculture, forestry and other land use’. (The Institute for Global Environmental Strategies: Hayama, Japan) Available at http://www.ipcc-nggip.iges.or.jp/public/2006gl/vol2004.htm [Verified 1 November 2010]
Kelliher FM, de Klein CAM (2006) ‘Review of New Zealand’s fertiliser nitrous oxide emission factor (EF1) data.’ (Ministry for the Environment: Wellington, New Zealand)
Ledgard S, Webby R, Hawke M (2002) Improved estimation of N excretion by grazing animals to improve N2O emission inventories. Report for the Ministry of Agriculture and Forestry, Wellington, New Zealand.
Litherland AJ, Woodward SJR, Stevens DR, McDougal DB, Boom CJ, Knight TL, Lambert MG (2002) Seasonal variations in pasture quality on New Zealand sheep and beef farms. Proceedings of the New Zealand Society of Animal Production 62, 138–142.
McFadden AM, Heuer C, Jackson R, West DM, Parkinson TJ (2004) Reproductive performance of beef cow herds in New Zealand. New Zealand Veterinary Journal 53, 39–44.
Ministry for the Environment (2010) New Zealand Greenhouse Gas Inventory 1990–2008. Report prepared for the United Nations Framework Convention on Climate Change. (Wellington, New Zealand)
Ministry of Agriculture and Forestry (2008) Forestry in the Emissions Trading Scheme. Report prepared for the Ministry of Agriculture and Forestry, Wellington, New Zealand.
Morris CA, Baker RL, Hickey SM, Johnson DL, Cullen NG, Wilson JA (1993) Evidence of genotype by environment interaction for reproductive and maternal traits in beef cattle. British Society of Animal Production 56, 69–83.
| Evidence of genotype by environment interaction for reproductive and maternal traits in beef cattle.Crossref | GoogleScholarGoogle Scholar |
New Zealand Sheep Council (2000) ‘A guide to improved lamb growth.’ (New Zealand Sheep Council in association with WoolPro and Meat New Zealand: Wellington, New Zealand)
Nicol GB, Dodds KG, Alderton MJ (1999) Field data analysis of lamb survival and mortality rates occurring between pregnancy scanning and weaning. Proceedings of the New Zealand Society of Animal Production 59, 98–103.
Priest R (2003) Genetics. In ‘Profitable beef production’. (Ed. D Smeaton) pp. 111–128. (New Zealand Beef Council: Wellington, New Zealand)
Rattray PV, Brookes IM, Nicol AM (2007) ‘Pasture and supplements for grazing animals.’ (New Zealand Society of Animal Production: Hamilton, New Zealand)
Roughsedge T, Thompson R, Villanueva B, Simm G (2001) Synthesis of direct and maternal genetic components of economically important traits from beef breed-cross evaluations. Journal of Animal Science 79, 2307–2319.
Schils RLM, Olesen JE, del Prado A, Soussana JF (2007) A review of farm level modelling approaches for mitigating greenhouse gas emissions from ruminant livestock systems. Livestock Science 112, 240–251.
| A review of farm level modelling approaches for mitigating greenhouse gas emissions from ruminant livestock systems.Crossref | GoogleScholarGoogle Scholar |
Sherlock R, Jewell P, Clough T (2009) Review of New Zealand Specific FracGASM and FracGASF Emissions Factors. Report for the Ministry of Agriculture and Forestry, Wellington, New Zealand.
Subcommittee on Beef Cattle Nutrition, Board of Agriculture, National Research Council (1996) ‘Nutrient requirements of beef cattle.’ (National Academy Press: Washington DC)
Sumner RMW, Wuliji T, Dobbie JL, Andrews RN, Upsdell MP (1998) Seasonality of wool growth in Waikato and Southland of Romney sheep selected for high fleece weight. Proceedings of the New Zealand Society of Animal Production 58, 270–273.
Thomas SM, Ledgard SF, Francis GS (2005) Improving estimates of nitrate leaching for quantifying New Zealand’s indirect nitrous oxide emissions. Nutrient Cycling in Agroecosystem 73, 213–226.
Wheeler DM, Ledgard SF, de Klein CAM (2008) Using the OVERSEER nutrient budget model to estimate on-farm greenhouse gas emissions. Australian Journal of Experimental Agriculture 48, 99–103.
| Using the OVERSEER nutrient budget model to estimate on-farm greenhouse gas emissions.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DC%2BD1cXovVyi&md5=c8178b4cfc4a31ae41278023b31afe56CAS |
Woodford K, Nicol A (2004) A re-assessment of the stock unit system. A report prepared for the Ministry of Agriculture and Forestry, Wellington, New Zealand.
