Irradiance is the main driver of photosynthesis. In natural conditions, irradiance incident on a leaf often fluctuates, due to the movement of leaves, clouds and the sun. These fluctuations force photosynthesis to respond dynamically, however with delays that are subject to rate constants of underlying processes, such as regulation of electron tran...
Croplands are a managed type of vegetation, with a carbon storage that is highly optimized for food production. For instance, their sowing dates are chosen by the farmers, their genetic potential is bred for high grain yields, and their on-field competition with other species is reduced to the minimum. As a result of human intervention, croplands a...
Incubation conditions need to be adjusted to meet embryonic requirements to obtain optimal chick quality and hatchability. Eggshell temperature (EST) can be used as a non- invasive method to determine embryo temperature. A high EST of 38.9°C during the second or third week of incubation negatively affects chicken embryo development and survival com...
Researchers are without question enthusiastic about the results of lighting trials with lilies. Results from both the first as well as the second flower development clearly show that with extra CO2, less lighting is required while maintaining stem weight and quality. “This conclusion clearly shows that it is possible to make substantial energy savi...
De totale CO2-emissie nam in 2014. Ook zit de totale CO2-emissie 1,1 Mton onder het niveau van 1990 (-16%). Indien wordt gecorrigeerd voor de warme buitentemperatuur in 2014 dan is de CO2-emissie in 2014 6,0 Mton en dit ligt ook onder het doel voor 2020. In geheel Nederland ligt de CO2-emissie 2% onder het niveau van 1990. De glastuinbouw loopt daa...
Summary Thesis ‘Studying biosphere-atmosphere exchange of CO2 through carbon-13 stable isotopes’ Ivar van der Velde Making predictions of future climate is difficult, mainly due to large uncertainties in the carbon cycle. The rate at which carbon is stored in the oceans and terrestrial biosphere is not keeping pace with the rapid increase in fossil...
De glastuinbouwsector is een miljarden business en daardoor van grote economische waarde. Keerzijde is dat de sector veel fossiele energie gebruikt, waarbij grote hoeveelheden CO2 worden uitgestoten. Duurzaamheid komt daardoor steeds nadrukkelijker op de agenda van de tuinbouw te staan. Een belangrijke stap in het verlagen van de CO2 voetafdruk van...
"Interpreting plant-sampled Δ14CO2 to study regional anthropogenic CO2 signals in Europe" Author: Denica Bozhinova This thesis investigates the quantitative interpretation of plant-sampled ∆14CO2 as an indicator of fossil fuel CO2 recently added to the atmosphere. We present a methodology to calculate the ∆14CO2 that has accumulated in a plant over...
In een kas voorzien van diffuus glas, koeling middels OPAC’s, LED tussenbelichting, actieve ventilatie onder het gewas en drie schermen is in een onderzoek van 2 jaar gewerkt aan het telen van goede rozen op een energiezuinig wijze. Na twee jaar onderzoek met Red Naomi werden rozen geproduceerd die aan de gestelde kwaliteitscriteria voldeden. Daarb...
