Stefan Karlowsky

Leibniz-Institute of Vegetable and Ornamental Crops · Next-Generation Horticultural Systems

Introduction Hydroponic vegetable cultivation is characterized by high intensity and frequent nitrogen fertilizer application, which is related to greenhouse gas emissions, especially in the form of nitrous oxide (N 2 O). So far, there is little knowledge about the sources of N 2 O emissions from hydroponic systems, with the few studies indicating...

Replacement of rock wool by organic substrates is considered to reduce the environmental impact, e.g., through energy savings during production and waste prevention, caused by hydroponically produced crops. A suitable substrate for plant production is characterized by an optimal composition of air- and water-filled pores. In our study, we used hemp...

Soilless culture systems offer an environmentally friendly and resource-efficient alternative to traditional cultivation systems fitting within the scheme of a circular economy. The objective of this research was to examine the sustainable integration of recycling fertilizers in hydroponic cultivation—creating a nutrient cycling concept for horticu...

The average nutrient concentrations values presented in Table 1 on page 4 in the publication have the unit mg L⁻¹ for the mineral nutrients Fe, Zn, B, Mn and Cu and must read as follows

A Correction to this paper has been published: https://doi.org/10.1007/s11356-021-15054-3

Nitrous oxide (N 2 O) is considered as the most critical greenhouse gas (GHG) emitted by agricultural and horticultural food production. Hydroponic vegetable cultivation in greenhouse systems has a high potential for N 2 O emissions due to the intense application of nitrogen-containing fertilizers. Previous studies on model hydroponic systems indic...

Soilless culture systems offer an environmentally friendly and resource-efficient alternative to traditional cultivation systems fitting within the scheme of a circular economy. The objective of this research was to examine the sustainable integration of recycling fertilizers in hydroponic cultivation-creating a nutrient cycling concept for horticu...

The supply of soil respiration with recent photoassimilates is an important and fast pathway for respiratory loss of carbon (C). To date it is unknown how drought and land‐use change interactively influence the dynamics of recent C in soil respired CO2. In an in situ common‐garden experiment, we exposed soil‐vegetation monoliths from a managed and...

Operating within a scheme of circular economies (CE) and the incorporation of nutrient cycling are principle components of future sustainable food systems (Springmann et al., 2018). The socio-political awareness of CE has prompted interest into classifying waste as a resource in economies of the future. Recycling-fertilizers are one such example of...

Numerous experiments have shown positive diversity effects on plant productivity, but little is known about related processes of carbon gain and allocation. We investigated these processes in a controlled environment (Montpellier European Ecotron) applying a continuous ¹³CO2 label for three weeks to 12 soil-vegetation monoliths originating from a g...

Average air δ13C-CO2 signature during the pre-enrichment phase and daily means of δ13C-CO2 at the outlet of the experimental units based on measurements every two hours during the period of continuous atmospheric 13CO2 labelling. (PDF)

Droughts strongly affect carbon and nitrogen cycling in grasslands, with consequences for ecosystem productivity. Therefore, we investigated how experimental grassland communities interact with groups of soil microorganisms. In particular, we explored the mechanisms of the drought-induced decoupling of plant photosynthesis and microbial carbon cycl...

Numerous experiments have shown positive diversity effects on plant productivity, but little is known about related processes of carbon gain and allocation. We investigated these processes in a controlled environment (Montpellier European Ecotron) applying a continuous 13CO2 label for three weeks to 12 soil-vegetation monoliths originating from a g...

Climate extremes and land-use changes can have major impacts on the carbon cycle of ecosystems. Their combined effects have rarely been tested. We studied whether and how the abandonment of traditionally managed mountain grassland changes the resilience of carbon dynamics to drought. In an in situ common garden experiment located in a subalpine mea...

Mountain grasslands have recently been exposed to substantial changes in land use and climate and in the near future will likely face an increased frequency of extreme droughts. To date, how the drought responses of carbon (C) allocation, a key process in the C cycle, are affected by land-use changes in mountain grassland is not known. We performed...