The marine microalga Phaeodactylum tricornutum was cultivated in semi-continuous culture under mixotrophic conditions with the soluble fractions of potato, rye and wheat flours that had been naturally fermented, at 2% or 4% (w/v). The rye flour produced the highest microalgal cellular density of 90×10(6) cells.ml(-1) when supplemented with NaNO3 and NaH2PO4. The autotrophic control only gave 57×10(6) cells.ml(-1). The value of agricultural surpluses, such as rye flour, can therefore be increased by its use in the production of valuable, microalgal biomass which is rich in protein, pigments and fatty acids.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1007/BF00327799 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Will vegetation restoration affect the supply-demand relationship of water yield in an arid and semi-arid watershed?
Sci Total Environ
January 2025
Key Laboratory of Agricultural Soil and Water Engineering in Arid and Semiarid Areas, Ministry of Education, Northwest A&F University, Yangling, Shaanxi 712100, PR China; College of Water Resources and Architectural Engineering, Northwest A&F University, Yangling, Shaanxi 712100, PR China.
Natural processes, combined with human activities, determine the inherent quality of regional water supply and demand. However, the interaction between artificial vegetation restoration and water supply-demand dynamics remains insufficiently understood, particularly in arid and semi-arid regions. This study focuses on the Jinghe River Basin (JRB) in the central Loess Plateau, aiming to investigate the changes in supply and demand of ecosystem water yield services and analyze factors affecting the water supply-demand relationship during the vegetation restoration, using the InVEST model, scenario analysis, and the Geodetector.
View Article and Find Full Text PDFIntegrating crop and dairy production systems: Exploring different strategies to achieve environmental targets.
Sci Total Environ
January 2025
Wageningen University & Research, Animal Production Systems Group, 6706 WD Wageningen, the Netherlands; Christian Albrechts University, Grass and Forage Science/Organic Agriculture, D-24118 Kiel, Germany.
The integration between crop and livestock production systems (ICLS) at regional level is seen as a pathway for more sustainable food production. The objective was to assess the effects on farm structure, economic performance and environmental impact of an ICLS with varying constraints on agricultural emissions, changes in land use and a lower external input use as means to achieve environmental targets. A linear optimization model was used for economic optimization of ICLS under different scenarios for the case of crop and dairy production systems on sandy soils in the Netherlands.
View Article and Find Full Text PDFSuccessful NH abatement policies and regulations in German agriculture.
Sci Total Environ
December 2024
Precision Agriculture Lab, School of Life Sciences, Technical University of Munich, D-85354 Freising, Germany.
Anthropogenic ammonia (NH) emissions, of which about 95 % are from agriculture, have led to environmental pollution, resulting in tremendous damage to human health and ecosystems. Thus, the NEC Directive 2016/2284/EU sets national reduction targets for NH emissions in individual EU countries. To implement the NEC Directive for NH emission targets, Germany amended the Fertilizer Application Ordinance in 2017 and 2020 (DüV_amended) and set the air pollution control regulation, Technical Instructions on Air Quality Control (TA_Luft).
View Article and Find Full Text PDFSimulations of Future Trends in Welfare-Centric Egg Production Systems: Impacts on Productivity and Prices.
J Poult Sci
June 2024
National Agriculture and Food Research Organization, Tsukuba 305-0901, Japan.
The implementation of more animal welfare-centric livestock production systems holds considerable potential for achieving sustainable production in Japan. However, such systems generally reduce productivity per unit area, impose financial burdens on farmers that adversely affect their physical and mental health, and require increased consumer awareness. In particular, declines in productivity per unit area substantially affect the farming economy, giving rise to concerns about the sufficient egg production for the population, which consequently exacerbates Japan's food security concerns.
View Article and Find Full Text PDFEffects of different nitrogen fertilization systems on crop yield and nitrogen use efficiency - Results of a field experiment in southern Germany.
Heliyon
April 2024
Technische Universität München, Chair of Organic Agriculture and Agronomy, Liesel-Beckmann-Straße 2, 85354 Freising, Germany.
The effects of the German Fertilizer Application Ordinance (GFO) on crop yield, nitrogen use efficiency and economical performance are highly controversial in science and practice in Germany. This study presents the results of a multi-year field experiment conducted at an experimental farm in southern Germany, in which the effects of different fertilizer systems on crop yield, protein concentration and nitrogen balance were analyzed. At this study site, relatively low N mineralization from the soil N pool was detected.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!