206 uppsatser · sida 10 av 14
… potatoes. Potato is a crop that requires a good access to water and nutrient. Nitrogen is the nutrient that has the greatest impact on the specific gravity, quality and yield of potato crop. The specific gravity is closely liked to the maturation of the potato plant. The results …
bestämning av flödesvägar och åtgärdsförslag för optimal fosforbindning vid avloppsrening med reaktiva filter
Discharge of untreated wastewater leads to unnaturally high levels of nitrogen and phosphorus in rivers, lakes and the sea, which results in unbalanced ecosystems with eutrophication and lack of oxygen. Part of the phosphorus in surface waters is coming from on-site wastewater …
… from a spruce dominated forest in Umeå. Different carbon sources together with nitrogen and phosforous were added to the soil and the respiration was measured with a respirometer. Each combination of carbon source and temperature was replicated 4 times at each of the …
studier av kretslopprojektet i Enköping och dess applicering på en kommun i Ryssland.
… where the circulation project would be a success. It would reduce emissions of nitrogen and phosphorous to the Baltic Sea and also reduce emissions of green house gases into the air. This project would not only fit Guryevsk municipality but also other municipalities of the same …
-en jämförelse mellan fjärrvärme och bergvärme i villa
… affected. We have calculated the mean value for discharges of carbon dioxide, nitrogen oxide, sulphur oxide and dust generated from electrical power used in Sweden. Through interviews and research we have gained data for the same substances that district heating based on …
… another study was done to compare two fertilizers which contained different nitrogen sources: ArGrow®complete with the aminoacid arginine and Wallco® with ammonium and nitrate. The inoculated pine seedlings had lower number of mycorrhizal infected short roots than the control …
hur påverkas lantbruksföretagens ekonomi och produktionsinriktning?
… for the biological effects of preceding crops, relationships between nitrogen application, yield and important quality parameters such as protein content in grain. Since the reduction of greenhouse gas emissions is not determined in quantity or formation, the results are …
vilka råd kan ekologer ge?
… soil that is slightly alkaline. The plant would also have to be permissive to nitrogen. The comments the ecologists made during the interviews deals with factors that may affect the establishment of plants and enable a richness of species.
Höje å
… In 1990 an environmental project started which aimed to reduce high levels of nitrogen and phosphorus that was found in Höje-å by recreating and constructing new ponds and wetlands along the watercourse.The changes, which have taken place, make a difference in the experience of …
effekter på beteende och emission av kväve (NH3 och N2O)
… level of crude protein is needed in the diet to pigs, which lead to more nitrogen (N) excreted in the faeces and urine. N can be emitted to the air in the form of e.g. ammonia (NH3), which contributes to eutrophication and acidification and as nitrous oxide (N2O), which is a …
effekter på lustgasavgång, kväveretention och andel vattenfyllda porer
… experiment the effect of three different biochars on nitrous gas emissions, nitrogenretention and water filled pore space (WFPS) were studied in a Swedish sandy soil, classified as aCryopsamment. Ammonium retention was positively correlated, while KCl-extractable ammoniumwas …
ett laboratorieförsök
The aim of this thesis was to examine if it is possible to keep nitrogen in the form of nitrate(NO3-) in ponds from one season to another by keeping a high concentration of oxygen in thepond water. This hypothesis was tested by doing a lab experiment where two systems …
Underlag för bedömning av normal och hög skyddsnivå i Köpings kommun
… Sea has high priority. There are many different sources of phosphorous and nitrogen and domestic wastewater is one contributing factor to the high load. Especially waste water from households that is not connected to municipal sewage treatment or a local small scale plant with …
ett framtida problem för områdets diversitet?
… exception prefers heavily disturbed areas and access to large amounts of nitrogen fertilizer from exhaust fumes
Evaluation of a new technique (Rapid-i?) for cleavage stage embryos and blastocysts
… vitrification has been the direct contact of the cryo-solutions with liquid nitrogen. Therefore, sealed containers have been developed and one of these is the Rapid-i? made by Vitrolife Sweden AB. We evaluated this new device using embryos not suitable for embryo transfer or …
