Abstract

NIETO, María et al. Estrategias de mitigación de emisiones de gases de efecto invernadero en sistemas ganaderos bovinos extensivos del sur de San Luis, Argentina. Estudio de casos. RIA. Rev. investig. agropecu. [online]. 2019, vol.45, n.3, pp.404-411. ISSN 1669-2314.

Cattle farming are one of the main sources of anthropogenic emissions of greenhouse gases (GHG). At the international, regional and national levels, there is a great diversity of studies related to the search for mitigation strategies for these gases. The objective of this work was to analyze the effect of the application of strategic technologies on GHG emissions in typical livestock production systems of the southern region of San Luis. To do this, six case studies were analyzed in their current characteristics (SPA) and two proposals were raised to improve their production systems (SPM1 and SPM2), estimating emissions by CH. through enteric fermentation and N.O of the managed soils. The GHG emissions were characterized and comparison was made of the systems between their three states (SPA, SPM1 and SPM2) was conducted through an ANOVA. The “emissions per calf” were significantly higher (P <0.001) in the SPA than in the SPM1 and SPM2, emitting 33% and 36% less emissions than the SPA. In the case of “emissions per kg of live weight sold”, emissions were significantly higher in the SPA compared to SPM2, emitting 25% less. The application of technologies not only reduce emissions but also improve the production of these systems. Therefore, the results show that the application of management practices in the production systems (animal load adjustment, herd rearrangement, pasture management, animal health, division of paddocks) have considerable potential to mitigate emissions of GHG in these systems.

Keywords : cow-calf and backgrounding; strategic technologies; stocking rate; nutritional management; rodeo management; sanitary calendar..