Does organic livestock husbandry uses less energy and produces less greenhouse gas than conventional husbandry? Analysis in lactating sheep farms

We have undertaken in this work an evaluation of the greenhouse gas (GHG) emissions and the Non-Renewable Energy (NRE) consumption on a sample of 1250 farms-years, operating in sheep meat production, in either organic (OA) or conventional (CA) agriculture, over the period 1987 to 2012, based on the Life Cycle Assessment (LCA) method. There was no significant difference for NRE consumption (79.6 MJ in OA and 79.7 MJ in CA, per kg of carcass); indeed the gains in OA thanks to a lower use of chemical fertilizers and purchase of lesser concentrates feed were offset by the higher level of mechanization (here fuels and equipment). For GHG emissions, we found a significant difference of 5% beneficial to organic production systems (31.1 vs. 32.7 kg CO2 eq/kg carcass)

Greenhouse gas emissions and fossil energy consumption in suckler beef production: variability and linkage to farm economics. 2-years longitudinal analysis of results from 59 farms

International audienc

Productivity and efficiency of French suckler beef production systems: trends over the last 20 years

International audienc

Analyse et déterminants de l'évolution des performances d'élevages bovins et ovins allaitants en zones défavorisées de 1990 à 2012

National audienceOver the past twenty years the Common Agricultural Policy reforms succeeded one another with, initially, subsidies provided to compensate the erosion of farm meat prices. Support was given to grassland or extensive farming systems. Despite this, the farm income of these farms remained on average among the lowest of all French farms. One response to the CAP, but also to market signals and hazards, has been a constant increase in the size of farms and labor productivity (by 30-80% in 20 years according to the regions) accompanied by a simplification of practices, for a near stagnation in the net income per worker, in constant euros. These observations from sheep and suckler cattle networks over the long term from the INTRA Clermont-Theix lead to questions about the economies of scale concepts, and about the direction of future agricultural policies.Au cours des vingt dernières années, les réformes de la Politique Agricole Commune (PAC) se sont succédées avec, au départ, des aides attribuées en compensation de la baisse des prix garantis. Un soutien a été accordé aux élevages herbagers et/ou extensifs. Malgré cela, les revenus des exploitations d’élevages allaitants, bovins et ovins, sont restés, en moyenne, parmi les plus faibles de l’ensemble des exploitations agricoles françaises. Une des réponses à la PAC, mais également aux signaux du marché et aux aléas, a été un accroissement constant de la taille de ces exploitations et de la productivité du travail (de + 45 à + 60% en 20 ans selon les régions), accompagnée d’une simplification des pratiques, pour une quasi-stagnation des revenus par travailleur en euros constants. Ces observations réalisées sur le long terme, à partir des réseaux ovins et bovins allaitants de l’INRA de Clermont-Theix, amènent à se poser des questions sur les notions d’économie d’échelle, sur l’efficacité des systèmes de production et sur les évolutions futures des structures de ces exploitations

Productivity and technical efficiency of suckler beef production systems: trends for the period 1990 to 2012

International audienc