Rotational rice systems, involving pastures, other crops and/or livestock, are common in temperate South America, exemplified by the rice-pasture-livestock system of Uruguay which combines very high rice yields with tight nitrogen (N) balances. The generally good nutrient use efficiency in these systems provides a template for nutrient management in other mixed farming systems, if the underlying processes can be sufficiently well quantified and understood.

Biological nitrogen fixation contributes greatly to the sustainability of agroecosystems. However, more information is needed about the impact that agricultural intensification, a frequent practice nowadays, would have on diazotrophic communities associated with plants. This work addresses the influence of intensifying rice cropping systems on the abundance, diversity, and structure of diazotrophic communities associated with rice roots (rhizospheric and endophytic bacteria) from a field experiment.

British and Northern Irish agri-food systems are faced with the challenge of reducing their supplychain emissions of greenhouse gases (GHGs) such as nitrous oxide (N2O), carbon dioxide (CO2) and methane (CH4) in line with the UK's ambition of achieving a cross-sector 'net zero' economy by 2050. Approximately 10% of the GHG emissions are generated by agriculture, and approximately 56% of these GHGs are generated by livestock in the form of CH4 from enteric fermentation (eructation primarily) and manure management (i.e., storage and subsequent application as an organic fertiliser).

It is unclear to what extent and on which variables does supplementing beef cattle on native grasslands affect sward structure, specifically on the dynamics of its grazing horizons.

El objetivo del trabajo fue utilizar la técnica de secuenciación parcial del gen 16S rARN para estudiar el efecto de la exposición a ricobendazol en el microbioma de heces de novillos con niveles contrastantes de conteos de huevos de nematodos gastrointestinales por gramo de materia fecal (hpg). El trabajo se realizó en INIA Treinta y Tres (Uruguay).