EFEM (Economic Farm Emission Model)

The Economic Farm Emission Model (EFEM) is an economic farm production model that simulates crop and livestock production systems.

economicfarmcroplivestockproduction

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Application-focused categoriesNatural-perspectiveLand regions
Application-focused categoriesHuman-perspectiveEconomic activities

Detailed Description

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Quoted from: Neufeldt, Henry, Michael Schäfer, Elisabeth Angenendt, Changsheng Li, Martin Kaltschmitt, and Jürgen Zeddies. "Disaggregated greenhouse gas emission inventories from agriculture via a coupled economic-ecosystem model." Agriculture, ecosystems & environment 112, no. 2-3 (2006): 233-240. https://doi.org/10.1016/j.agee.2005.08.024 

The Economic Farm Emission Model (EFEM) is an economic farm production model that simulates crop and livestock production systems (Angenendt, 2003Schäfer et al., 2004). The model is based on linear programming of typical agricultural production systems at farm level and simulates all relevant farm management processes including mechanization, animal and crop production, animal housing, manure management, farm N cycle, and a complete business calculation (Fig. 1). The mathematical up-scaling algorithm described in Kazenwadel and Doluschitz (1998) is used to account for a regionally representative distribution of the production systems. Input parameters include statistical data of the production systems, such as land area distribution, planted crops, number and type of animals, N fertilization, farm structures, costs, and revenues (KTBL, 1993KTBL, 2000KTBL, 2002MLR, 1998ZMP, 2001aZMP, 2001bZMP, 2001cZMP, 2001dDESTATIS, 2001), indicators of the political environment, such as subsidies and laws (MLR, 1997MLR, 2000MLR, 2001BMVEL, 2002aBMVEL, 2002b), and emission factors (IPCC, 1997Döhler et al., 2002Bareth and Angenendt, 2003). Details of the different regional groups (RGs), which are composed of several adjacent municipals with similar environmental conditions, and typical production systems in Baden-Württemberg are given in Table 1.

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Fig. 1. Flow diagram of EFEM–DNDC.

Table 1. Agricultural land area, N fertilizer input (Nmin, Norg), stocking rates per livestock unita, gross margins, and total GHG emissions of the regional groups (RG) and agricultural production systems in Baden-Württemberg

Code Agricultural land areab (km2) Nmin (kg N ha−1) Norg (kg N ha−1) Livestock (LU ha−1) Gross margin (€ ha−1) GHG (kg CO2 eq ha−1)
  Total Cropland Grassland Vineyards Orchards          
RG1 2377 1781 455 105 36 104 28 0.43 1290 4062
RG2 2033 1235 521 116 160 84 26 0.42 1620 3842
RG3 1215 217 988 4 7 29 54 0.88 1020 4305
RG4 2320 1184 1136 0 0 59 41 0.64 950 3676
RG5 536 49 484 0 3 20 104 1.54 1890 8165
RG6 2514 1635 870 0 9 84 65 0.96 1510 5883
RG7 1769 852 911 1 5 63 53 0.84 1160 4439
RG8 1917 1542 361 10 3 104 47 0.68 1330 4120
Baden-Württemberg 14681 8495 5726 236 223 77 47 0.71 1310 4504
Fruit/grapes 696 231 6 236 223 112 1 0.01 3860 2590
Cash crops 3124 3124 0 0 0 134 2 0.02 690 2940
Cash crops/poultry 819 819 0 0 0 141 3 0.05 650 3396
Cattle/sheep 8444 2723 5721 0 0 42 66 1.03 1260 5198
Pigs 1599 1599 0 0 0 99 75 1.01 1990 5307
a

One livestock unit (LU) is equivalent to 500 kg live weight.

b

Luvisols (31%), Cambisols (19%), Vertisols (12%), Leptosols (11%), Regosols (9%), Fluvisols (6%), Gleysols (5%), Planosols (2%), Histosols (2%), Anthrosols (1%), and Podzols (1%). Source: Neufeldt (2005).

The model simulates farm emissions of CO2, CH4, N2O, and NH3 from fossil fuels, mineral fertilizers, additional feed, ruminant enteric fermentation, and manure management, and provides economic parameters, such as gross margin, shadow prices, and mitigation costs.

模型元数据

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EFEM team (2020). EFEM (Economic Farm Emission Model), Model Item, OpenGMS, https://geomodeling.njnu.edu.cn/modelItem/9191f330-7db6-4a1e-8b6a-422a47c569d0
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Initial contribute : 2020-01-02

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