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Advisor(s)
Abstract(s)
Dairy cattle farms have a well-known environmental impact that affects all ecological compartments: air,
soil, water and biosphere [1]. Dairy cattle farming are a significant source of anthropogenic gases from
enteric fermentation, manure storage and land application, mainly ammonia (NH3), nitric oxide (NO),
nitrous oxide (N2O), carbon dioxide (CO2) and methane (CH4). The emission of such gases represents not
only an environmental problem but also leads to energy and nitrogen (N) losses in ruminant production
systems [2-5]. Several efforts are required on the development of new technologies and strategies that
mitigate gaseous emissions, N losses and improve the efficiency of the energy and N cycles [6, 7]. In the
Northwest of Portugal, dairy cattle production has a major impact on the economy, with strong
repercussions at national scale. Therefore, our Ph.D. thesis project aims to:
a) Study natural supplements as additives in the dairy cattle diet towards a decrease in GHG
emissions from feeding operations;
b) Compare commercial dairy cattle diets with and without additives on gaseous emissions from
manure deposited in a simulated concrete floor;
c) Assess the concentrations and emissions of NH3 and greenhouse gases from commercial dairy
cattle facilities;
d) Evaluate the effects of different additives on lowering gaseous emissions from dairy cattle
excreta, using a laboratory system simulating a dairy house concrete floor.
Description
Keywords
Dairy cattle farms environmental impact
Citation
Rodrigues, A.R., Gomes, A., Ferreira, L., Trindade, H., Fonseca, A.J.M. & Pereira, J.L. ( 2016, setembro). “Dairy cattle-slurry treatment technologies: towards an integrating approach of crop production, animal feeding and environmental impacts”. Poster apresentado no III Workshop Science Animal Doctoral Programme no Instituto de Ciências Biomédicas Abel Salazar, Universidade do Porto.
Publisher
Universidade do Porto