Organic Eprints
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Utility of dried and fermented meal from the duckweed species Spirodela polyrhiza as fishmeal-protein replacer in diets for common carp fry
Get PDFThe family of cyprinids comprises some of the most important fish species in global aquaculture. With increasing global fish production also increasing amounts of suitable and sustainably produced high-quality feeds other than fishmeal are needed. Duckweed (Spirodela polyrhiza) is a fast growing aquatic plant with the potential of high biomass and protein production in nutrient recycling systems. This study reports the effects on growth, feed conversion and proximate body composition of common carp (Cyprinus carpio L.) fry fed graded levels of differently processed duckweed (meals dried and fermented) each replacing 150, 300 or 450 g/kg of dietary fishmeal protein. Comparisons were made to a duckweed-free and fishmeal-based control, containing 400 g/kg of fishmeal, equivalent to 261.9 g/kg of fishmeal protein. Carp fed the highest inclusion rate of fermented duckweed showed a significantly reduced performance (growth and feed conversion rate) compared to all other groups. No differences regarding growth and feed conversion rate were found among all other groups. Whole body crude lipid content was generally lower and crude ash content generally higher in carp fed dried compared to those fed fermented duckweed. Whole body crude protein content was not influenced by treatments. Based on the results of this study, dried S. polyrhiza meal could be used to replace up to 450 g/kg of fishmeal protein, while fermented S. polyrhiza meal should only replace up to 300 g/kg fishmeal protein in diets for carp fry
Effects of pruning on flowering and yields of Cacao Nacional Boliviano
Get PDFCacao Nacional Boliviano (CNB), the native cacao germplasm group in the Bolivian Amazon region, possesses distinct morphological, genetic, phenological and organoleptic characteristics. It is highly sought after in the global fine-flavour chocolate market, and has importance for conservation of cacao genetic diversity. However, CNB cultivation is minor and yield levels low. Aiming to develop profitable CNB cultivation practices adapted to its distinct phenology and genetic basis, we compared parameters on CNB flowering, yields, biomass and harvesting effort in three agricultural systems with and without pruning and varying management intensity: agroforestry with pruning (AF), underplanted secondary forest with (SFwP), and without pruning (SFnP). Repeated measures linear mixed models using Restricted Maximum Likelihood were applied for statistical analysis. While AF and SFnP yielded 127.6 ± 21.4 kg ha−1 and 212.4 ± 22.2 kg ha−1 on average, reaching > 300 kg ha−1 after 11 and 9 years, respectively, SFwP yields remained significantly lower than SFnP, with an average of 58.0 ± 9.5 kg ha−1 and maximum yield of 122.6 ± 36.5 kg ha−1. This study demonstrates there may be a trade-off between pruning intensity and yield in AF and SFwP, as observed on young CNB trees’ yield developments and yield increases during two years without pruning in mature trees. Based on preliminary results and CNB-specific phenology, we suggest a moderate pruning intervention early in July (allowing recovery time before start of flowering season in August), along with the need for validation of our findings and further investigation into management practices tailored to CNB
Hva skal til for at flere bønder velger å drive økologisk?
No full textNorge har fått en ny strategi for økologisk jordbruk – men hvordan sikrer vi at den faktisk virker? En global forskningsoppsummering peker på fem avgjørende faktorer som bør ligge til grunn for veien videre
45 års forskning: Økologisk jordbruk utmerker seg på flere områder
No full textSiden 1978 har FiBL gjennom DOK-forsøket i Sveits sammenlignet ulike dyrkingsmetoder. Den nyeste rapporten oppsummerer 45 års forskning og viser at økologisk og biodynamisk jordbruk gir bedre jordhelse, høyere biologisk mangfold, lavere klimagassutslipp og mer karbonlagring enn konvensjonelt jordbruk
Podcast: Die Zukunft des Seafood – Klimawandel, Lösungsansätze und neue Perspektiven | FiBL Focus
No full textDie neue Episode des "FiBL-Focus"-Podcast mit Timo Stadtlander bietet einen umfassenden Einblick in den Zustand der Meere und wie der Klimawandel diese entscheidenden Ökosysteme beeinflusst
Neue robuste Biosorten bereichern die Sortenliste Kartoffeln
No full textDie Sortenliste Biokartoffeln wurde aktualisiert und um neue robusten Kartoffelsorten wie Oscar, Beyonce und Lady Jane ergänzt. Sie bietet wertvolle Orientierung für den Biokartoffelanbau
Weiden bieten wertvolle Lebensräume für die Biodiversität
No full textExtensiv genutzte Weiden bieten viele Lebensräume für Pflanzen und Tiere. Doch auch auf intensiv bewirtschafteten Flächen lässt sich mit durchdacht eingesetzten Strukturen mehr Biodiversität schaffen
Les pâturages offrent des biotopes précieux pour la biodiversité
No full textLes pâturages extensifs offrent de nombreux habitats aux plantes et aux animaux. On peut toutefois aussi créer davantage de biodiversité sur des surfaces exploitées intensivement grâce à des structures mises en place de manière réfléchie
3 oplæg ved Green Soutions Centre, Københavns Universitet, og IPBES Danmarks symposium
No full textOrganic+ og EcoMetric projekter blev præsenteret ved symposiet: Hvordan adresserer vi biodiversitetskrisen på land i Danmark? afholdt af Green Solutions Centre, KU og IPBES Danmark.
Over 300 deltagere tog del i arrangementet, inkl. forskere, beslutningstagere og fagfolk. Symposiet var inddelt i tre sessioner hvoraf den sidste, "Biodiversitet i det dyrkede land - funktionel biodiversitet", indholdt tre oplæg fra projektpartnere:
- "En helhedsorienteret tilgang til at fremme biodiversitet i landbrugsland" ved Yoko Dupont, seniorforsker, Institut for Agroøkologi - Agerlandets Biodiversitet, Aarhus Universitet, koordinator af Organic+ og EcoMetric
- "Potentialet for liv i det dyrkede land" ved Laura Attrup Bille, konsulent, Innovationscenteret for Økologisk Landbrug, partner på Organic+ og EcoMetric
- "Konkrete initiativer for mere biodiversitet på Gram Slot" ved Svend Brodersen, gårdejer, Gram Slot, partner på Organic
La vigne vue comme culture associée
No full textDiversité dans la vitiforesterie: Pour Jürg Strauss, c’est plus que des arbres dans le vignoble