QUESTIONING POULTRY INDUSTRY ABOUT SUSTAINABILITY AND BONDS TO TERRITORIES: A CASE STUDY IN FRANCE AND BRAZIL

N° ISBN - 978-2-7380-1284-5International audiencePoultry production chain is an integrated sector seen as "off land". However this chain is strongly interacting with territories leading to various impacts. Therefore to deal with sustainability requires transdisciplinarity and exchanges with numerous stakeholders. The first step is to define the studied dynamic system, here the "poultry production chain * county" aggregate. The second is to share between disciplines a common knowledge on this system through a unique representation. The third is to accept the approaches proposed by other disciplines even though time and space scales are consequently evolving. Due to the approach complexity, fruitful but time-consuming transactions between researchers are observed

Démontrer la capacité de l’agriculture à relever le défi énergétique: L’agriculture face à de multiples défis

première partie du dossier : Économies d’énergie et précarité énergétiqueabsen

Energy analysis and measurement of the greenhouse gas emissions of livestock systems. A comparison of different livestock systems in the eastern brazilian amazon

This paper introduces an assessment method based on the Planet method (2002). It aims to measure the energy inputs and outputs, their conversion efficiencies and the greenhouse gas (GHG) emissions in agricultural systems at the farm level. The method was applied to compare smallholder mixed dairy-beef livestock systems (SM) with two extensive and highly technical beef breeding-fattening (BB) and fattening (BF) systems, in the Eastern part of the Brazilian Amazon. It appears that SM farms are the lowest-level input system (13 koe ha-1 of pasture); therefore, they do not require substantial amounts of fossil-energy to produce the outputs. The BF system is the highest level inputs user (60 koe ha-1 of pasture). No significant difference was found for the BB system when compared to the BF and SM systems (38 koe ha-1 of pasture). In regards to the energy outputs, the SM system had the lowest production per hectare of pasture (30 koe ha-1 of pasture), while the BB system had an intermediate amount of energy production (68 koe ha-1 of pasture), and the BF system had the highest production (129 koe ha-1 of pasture). The only output from the BB and BF systems is beef, while the SM system produces beef obtained from the sale of male calves to the BF farms and also dairy products on the local market (essentially cheese). No significant difference was found between the three systems in terms of energy efficiency (average of 2.3). Finally, the GHG emissions were the highest for the BF system (7814 kg CO2 ha-1 of pasture), intermediate for the BB system (2619 kg of CO2 ha-1 of pasture), and the lowest for the SM system (1702 kg of CO2 ha-1 of pasture). The major source of emissions differed for the three systems - burning practices for the SM farms; enteric fermentation for the BB farms; and the purchase of calves and burning practices for two-thirds and one-third of the BF farms, respectively. The energy inputs and outputs and GHG emissions expressed per ton of live weight produced were compared between the BB and the BF systems. No significant differences were found for the four indicators. According to other analyses, the three systems studied are low-level fossil energy users

POULTRY INDUSTRY AND THE SUSTAINABLE DEVELOPMENT OF TERRITORIES: WHAT LINKS? WHAT CONDITIONS?

N° ISBN - 978-2-7380-1284-5International audienceThe relations between poultry industry and territories are specific in agriculture. Several reasons can be given: modern poultry farms are considered as off-land, poultry productive chain is driven by major industrial operator, and relocating the production is easy. For a better understanding of the sustainability of agricultural territories, it can be helpful to characterize some interactions between the production chain and the territories. For that, two contrasted countries, France and Brazil were chosen and within each, one territory with significant poultry production are considered. The "poultry production * territory" systems were studied and compared through a systemic approach. From this analysis, common features were obtained but also contrasted ones explaining, at least partially, the observed dynamics: positive in Brazil, less optimistic in France. However, sustainability should not be reduced to the economical growth and the other axis underlined that the double-sided impacts could also be found on the social or the environmental areas. A DPSIR model was used to understand and describe the changes in each system. As a main output, this work examines how the "poultry production * territory" system took place and evolved in each case, and discusses the main factors to evaluate sustainability resulting from the interaction between poultry production chain and territories