Agriculture is responsible for 8% of the total emissions of greenhouse effect gases and so, given the EU adhesion to the 1997 Kyoto protocol, it is obliged to assume a certain percentage in the reduction of these emissions. 41% of nitrous oxide (N2O) emissions of human origin in Europe comes from agriculture. The soil, through microbic processes of nitrification and denitrification, is deemed to be mainly responsible for these N2O emissions, contributing to NO emissions also.
Meadowlands form a system with a high potential for the emission of these gases, given their high quantity of organic material and the high levels of fertilisation to which intensive agriculture subjects them. In this study the following factors in N2O and NO emission in meadowlands have been investigated: fertilisation, the water content in the soil, tillage and the use of nitrification inhibitors.
The results obtained indicate that the clay soils studied in the Basque Country show a high level of nitrification. As a consequence, the Nitrogen from applications of organic residues is quickly transformed into a mineral Nitrogen which is susceptible to loss to the atmosphere in the form of oxides of Nitrogen and mainly as a consequence of nitrification. The addition of inhibitors of nitrification is a recommended practice for this type of fertiliser. The N2O emissions derived from mineral fertilisation with ammmonium calcium nitrate are mainly produced through desnitrification, and it is therefore recommended to adjust the mineral fertiliser rather than have to use it in conjunction with DCD. Practices like tillage have a negative effect, provoking N2O and NO emissions even over and above the levels recorded in highly fertilised but untilled areas. Given that it is common practice to dig up a field for the cultivation of forage maize, tillage using nitrogen-based fertilisation should be well-spaced so as to avoid high NO and N2O emissions
Plasma-zapping process could yield trans fat-free soybean oil product
02.12.2016 | Purdue University
New findings about the deformed wing virus, a major factor in honey bee colony mortality
11.11.2016 | Veterinärmedizinische Universität Wien
Yersiniae cause severe intestinal infections. Studies using Yersinia pseudotuberculosis as a model organism aim to elucidate the infection mechanisms of these...
Researchers from the University of Hamburg in Germany, in collaboration with colleagues from the University of Aarhus in Denmark, have synthesized a new superconducting material by growing a few layers of an antiferromagnetic transition-metal chalcogenide on a bismuth-based topological insulator, both being non-superconducting materials.
While superconductivity and magnetism are generally believed to be mutually exclusive, surprisingly, in this new material, superconducting correlations...
Laser-driving of semimetals allows creating novel quasiparticle states within condensed matter systems and switching between different states on ultrafast time scales
Studying properties of fundamental particles in condensed matter systems is a promising approach to quantum field theory. Quasiparticles offer the opportunity...
Among the general public, solar thermal energy is currently associated with dark blue, rectangular collectors on building roofs. Technologies are needed for aesthetically high quality architecture which offer the architect more room for manoeuvre when it comes to low- and plus-energy buildings. With the “ArKol” project, researchers at Fraunhofer ISE together with partners are currently developing two façade collectors for solar thermal energy generation, which permit a high degree of design flexibility: a strip collector for opaque façade sections and a solar thermal blind for transparent sections. The current state of the two developments will be presented at the BAU 2017 trade fair.
As part of the “ArKol – development of architecturally highly integrated façade collectors with heat pipes” project, Fraunhofer ISE together with its partners...
At TU Wien, an alternative for resource intensive formwork for the construction of concrete domes was developed. It is now used in a test dome for the Austrian Federal Railways Infrastructure (ÖBB Infrastruktur).
Concrete shells are efficient structures, but not very resource efficient. The formwork for the construction of concrete domes alone requires a high amount of...
10.01.2017 | Event News
09.01.2017 | Event News
05.01.2017 | Event News
18.01.2017 | Power and Electrical Engineering
18.01.2017 | Materials Sciences
18.01.2017 | Life Sciences