Groei, klimaat en milieu
status: published
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Wanneer we spreken over hersenen bedoelen we gewoonlijk het geheel van de grote hersenen (cerebrum), de kleine hersenen (cerebellum) en de hersenstam. Die structuren liggen in de schedel en vormen samen met het ruggenmerg het centrale zenuwstelsel. De hersenen wegen gemiddeld ongeveer 1.300 gram, het gemiddelde gewicht bij mannen is iets groter dan...
Crop growth and development in closed and semi-closed greenhouses
(Semi-)closed greenhouses have been developed over the last decades to conserve energy. In a closed greenhouse, window ventilation is fully replaced by mechanical cooling while solar heat is temporarily stored in an aquifer. A semi-closed greenhouse has a smaller cooling capacity than a closed greenhouse and, in which mechanical cooling is combined...
The evaluation of energy in fish feed
New and alternative plant ingredients are increasingly incorporated in fish feed due to the scarcity of captured fish and increased fishmeal and fish oil prices. As a result, current fish feeds are characterized by a highly variable ingredients composition, leading to a similar variability in the dietary macronutrients composition, especially the c...
First week nutrition for broiler chickens : effects on growth, metabolic status, organ development, and carcass composit...
During the first week of life, broiler chickens undergo various developmental changes that are already initiated during incubation. Ongoing development of organs such as the gastro- intestinal tract and the immune system may affect the nutritional requirements during this age period. Despite the residual yolk that is available at hatch and that may...
Simulation nitrogen-limited crop growth with SWAP/WOFOST : process descriptions and user manual
This report describes a soil nitrogen module (Soil-N), which is combined with the agro-hydrological model, SWAP, and the crop growth model, WOFOST. The core of the Soil-N module is a description of the nitrogen cycle, which is coupled to the organic matter cycle based upon the RothC-26.3 model. Nitrogen can be supplied to the soil as different type...
Monitoring mosselgroei Flakkeese spuisluis : resultaten T0 bemonstering 2016
In de winter van 2016/2017 zal de Flakkeese spuisluis in de Grevelingendam weer in gebruik worden genomen. De spuisluis, bestaande uit een hevel, vormt een verbinding tussen het Grevelingenmeer en de Oosterschelde. Door het openen van de hevel zal als gevolg van het getij op de Oosterschelde water heen en weer worden getransporteerd tussen de Ooste...
Recovery of nutrients from biogas digestate with biochar and clinoptilolite
The liquid fraction of digestate contains nutrients which makes it a valuable fertiliser in agricultural crop production systems. However, direct application of digestate may raise practical and environmental problems. Therefore, processes to concentrate nutrients have been proposed aiming not only to treat the liquid fraction of digestate to overc...
Microalgae production in a biofilm photobioreactor
Microalgae can be used to produce high-value compounds, such as pigments or high value fatty acids, or as a feedstock for lower value products such as food and feed compounds, biochemicals, and biofuels. In order to produce these bulk products competitively, it is required to lower microalgae production cost. Production costs could be reduced by em...
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