SABIIA - Sistema Aberto e Integrado de Informação em Agricultura (Sabiia)

Askegaard, Margrethe; Olesen, Jørgen E.; Rasmussen, Ilse A.; Driessen, Eugene; Nielsen, Erling; Thomsen, Henning C.; Bak, Holger; Lindberg, Julie F..

Hvordan kan sædskiftet indrettes så den økologiske kornproduktion øges uden at bæredygtigheden mindskes? Dette centrale spørgsmål belyses med resultater fra et økologisk sædskifteforsøg, der i 1996/97 blev anlagt på tre lokaliteter i Danmark. Da forsyningen med kvælstof (N) kan være meget kritisk i økologisk kornproduktion blev forsøget designet med fokus på dyrkningsmæssige faktorer der har indflydelse på N-forsyningen. Tre faktorer blev undersøgt: 1) Betydning af andel af N-fikserende afgrøder i sædskiftet 2) Betydning af efterafgrøder 3) Betydning af tilførsel af husdyrgødning. Der blev målt udbytter, udvaskning af næringsstoffer samt forekomst af ukrudt. Forsøget demonstrerer vigtigheden af at undersøge dyrkningsfaktorer i en...

Tipo: Journal paper

Palavras-chave: Cereals; Pulses and oilseeds Weed management Composting and manuring.

Ano: 2004

URL: http://orgprints.org/7854/1/7854.pdf

Nitrogen use efficiency of cereals in arable organic farming

Olesen, Jørgen E.; Rasmussen, Ilse A.; Askegaard, Margrethe.

The effect of nitrogen (N) supply and weeds on grain yield of spring barley, winter wheat and winter rye was investigated from 1997 to 2004 in an organic farming crop rotation experiment in Denmark on three soil types varying from coarse sand to sandy loam. Two experimental factors were included in the experiment in a factorial design: 1) catch crop (with and without), and 2) manure (with and without). The apparent recovery efficiency of N in grains (nitrogen use efficiency, NUE) from NH4-N in applied manure varied from 29 to 38% in spring barley and from 23 to 44% in winter cereals. The NUE of above-ground N in catch crops sampled in November prior to the spring barley varied from 16 to 52% with the largest value on the coarse sandy soil and the smallest...

Kvikbekæmpelse på sandjord

Palavras-chave: Cereals; Pulses and oilseeds Air and water emissions Composting and manuring.

Ano: 2008

URL: http://orgprints.org/14690/1/Paper_ISOFAR2.pdf

Melander, Bo; Rasmussen, Ilse A..

Artiklen omhandler dyrkningsmæssige faktorers betydning for forekomsten af alm. kvik i økologiske sædskifter på sandjord.

The value of catch crops and organic manures for spring barley in organic arable farming

Palavras-chave: Weed management.

Ano: 2013

URL: http://orgprints.org/25675/6/25675.pdf

Olesen, Jørgen E.; Hansen, Elly M.; Askegaard, Margrethe; Rasmussen, Ilse A..

The effect of nitrogen (N) supply and weeds on grain yield of spring barley was investigated in an organic farming crop rotation experiment on three different soil types in Denmark from 1997 to 2001. Three experimental factors were included in the experiment in a factorial design: 1) crop rotation (lupin or pea/barley as previous crop to barley), 2) cover crop (with and without), and 3) manure (with and without). The crop rotations included grass-clover as a green manure crop. Animal manure was applied as slurry in rates corresponding to 40% of the N demand of the cereal crops. Application of 50 kg NH4-N ha-1 in manure (slurry) increased barley grain DM yield by 1.0 to 1.3 Mg DM ha-1, whereas the use of cover crops (primarily perennial ryegrass)...

Tipo: Journal paper

Palavras-chave: Farming Systems.

Ano: 2007

URL: http://orgprints.org/3852/2/3852.pdf

Weed control in organic crop rotations for grain production

Rasmussen, Ilse A.; Askegaard, Margrethe; Olesen, Jørgen E..

Weed management carried out in organic crop rotation experiments for grain production. Preliminary results.

Organic Eprints - training for National Editors

Palavras-chave: Weed management Cereals; Pulses and oilseeds.

Ano: 1999

URL: http://orgprints.org/248/1/EWRS990325.PDF

OK-Net Arable online knowledge platform

Training for National Editors of Organic Eprints.

Tipo: Teaching resource

Palavras-chave: Education; Extension and communication.

Ano: 2011

URL: http://orgprints.org/18381/4/18381.pdf

Rasmussen, Ilse A.; Jensen, Allan Leck; Jørgensen, Margit Styrbæk; Kristensen, Helene; Conder, Malgorzata; Micheloni, Cristina; Moeskops, Bram.

The complexity of organic farming requires farmers to have a very high level of knowledge and skills, but exchange on organic farming techniques remains limited. In order to increase productivity and quality in organic arable cropping in Europe, the thematic network OK-Net Arable under Horizon 2020 has the aim to improve the exchange of innovative and traditional knowledge among farmers, farm advisers and scientists. An online platform for knowledge exchange has been created, offering innovative education and end-user material as well as communication between stakeholders. A number of specific tools – providing information about how to put existing knowledge from research and practise into use – have been chosen. They are presented on the platform with the...

Resultater og erfaringer med rodukrudtsbekæmpelse i økologisk planteproduktion ved AU

Palavras-chave: Crop husbandry; Social aspects; Technology transfer; Research communication and quality.

Ano: 2017

URL: http://orgprints.org/32354/7/Rasmussen_OK-Net%20Arable_OWC_2017_pres.pdf

Melander, Bo; Rasmussen, Ilse A.; Holst, Niels.

Præsentation af forskningsresultater vedrørende rodukrudtsbekæmpelse i økologisk jordbrug udført ved Aarhus Universitet

Farmknowledge.org - knowledge platform of OK-Net Arable

Palavras-chave: Weed management.

Ano: 2011

URL: http://orgprints.org/20620/4/20620.pdf

Rasmussen, Ilse A.; Jensen, Allan Leck; Jørgensen, Margit Styrbæk; Kristensen, Helene; Christensen, Dennis.

URL: http://orgprints.org/32525/1/OK-Net_WP4_presentation_BioFach_20170216%20%28002%29.pdf

Palavras-chave: Crop husbandry; Social aspects; Technology transfer; Research communication and quality.

Ano: 2017

Sameksistens mellem genetisk modificerede, konventionelle og økologiske afgrøder

Balance i ukrudtsbestanden

I forbindelse med udarbejdelsen af en strategi for sameksistens mellem GM-afgrøder og konventionelle og økologiske afgrøder er der nedsat en udredningsgruppe samt tre undergrupper, der behandler faglige spørgsmål vedr. raps, græs- og kløverfrø samt økonomiske konsekvenser”. På et seminar i maj, hvor forskere og repræsentanter for interesseorganisationer deltog, blev det foreløbige arbejde gennemgået og diskuteret.

Tipo: Journal paper

Palavras-chave: Production systems; Policy environments and social economy.

Ano: 2003

URL: http://orgprints.org/1492/1/gmo.pdf

Rasmussen, Ilse A.; Melander, Bo.

Anvendelse af forebyggende metoder som konkurrencedygtige sorter og sædskifte kan være med til at reduceres bestanden af frøukrudt. Dette giver mulighed for en reduktion i herbicidanvendelsen, eller en bedre bekæmpelse af arter, som ellers kan være svære at kontrollere med herbicider.

Organic Eprints - spiren til succes

Palavras-chave: Weed management.

Ano: 2005

URL: http://orgprints.org/7916/1/Mark2005.bmp

Recent advances in weed management in cereals in Denmark

FØJO har etableret et åbent internet-arkiv, Organic Eprints for forskningen i økologisk jordbrug. Siden starten i efteråret er der lagt 300 artikler ind - flest fra FØJO og andre danske projekter, men også fra resten af Skandinavien, Tyskland, Holland, Schweitz og sågar en enkelt fra Australien! På længere sigt er det intentionen at arkivet skal kunne samle resultaterne fra økologisk forskning - gerne over hele verden. Der er indgået aftale med FiBL Berlin om et samarbejde om at bruge arkivet til tyske publikationer og lave et tysksproget interface. Og CUL, Sverige vil arbejde for at svenske forskere i så høj udstrækning som muligt lægger deres publikationer ind i arkivet.

Tipo: Journal paper

Palavras-chave: Research methodology and philosophy; "Organics" in general.

Ano: 2003

URL: http://orgprints.org/1502/1/eprint.pdf

Rasmussen, Ilse A.; Melander, Bo; Rasmussen, Karsten; Jensen, Rikke K.; Hansen, Preben K.; Rasmussen, Gitte; Christensen, Svend; Rasmussen, Jesper.

Cultural methods for prevention and improved crop competitiveness against weeds and mechanical weed control.

Ukrudtsbekæmpelse i økologisk dyrket vintersæd: resultater og erfaringer

Palavras-chave: Weed management Cereals; Pulses and oilseeds.

Ano: 2000

URL: http://orgprints.org/250/1/management.PDF

Rasmussen, Ilse A.; Melander, Bo.

I Danmark dyrkes en del vintersæd økologisk – især vinterhvede, men også rug og triticale. Et af problemerne i vintersæden kan være ukrudtsbekæmpelse. Mekanisk ukrudtsbekæmpelse i vintersæd frembyder både nogle problemer og nogle muligheder. Forskningsresultater viser, at med et lavt ukrudtstryk kan vintersæden sås til normal tid ved almindelig rækkeafstand og der kan udføres ukrudtsbekæmpelse ved ukrudtsharvning efterår og forår, men ved højt ukrudtstryk og især forekomst af arter med pælerod og strækningsvækst som lugtløs kamille (Tripleurospermum inodorum), korn-valmue (Papaver rhoeas) m.fl. vil det være mere hensigtsmæssigt at så sent, på stor rækkeafstand og med høj udsædsmængde, så der kan udføres radrensning kombineret med ukrudtsharvning. I det...

Svært at holde kvikken i skak

Palavras-chave: Weed management Cereals; Pulses and oilseeds.

Ano: 2001

URL: http://orgprints.org/258/1/FnyttIAR_BME.pdf

Foråret nærmer sig - på de lette jorde på Jyndevad og Foulum er efterafgrøderne tandfræset et par uger før forårspløjningen, for at fremme omsætningen og dermed frigørelsen af de næringsstoffer efterafgrøden har samlet op. På Jyndevad er der pløjet, tromlet og udbragt gylle, som bliver placeret i strenge i jorden for at fremme afgrødens chance for at få fat i næringsstofferne før ukrudtet. Og forhåbentlig bliver der sået før Påske! Også på den stive lerjord i Holeby, som var vinterpløjet, er der kørt gylle og sået. I Holeby er der ekstremt lave fosfortal, og for at undersøge betydningen af dette for udbytterne, er en tredjedel af arealet af hver parcel blevet tilført 420 kg tripelfosfat. I Holeby er vinterhveden ukrudtsharvet. Dette gøres så tidligt som...

Design og sortsvalg i specialforsøg BAROF-WP2 – Ukrudtskonkurrence

Palavras-chave: Crop combinations and interactions Cereals; Pulses and oilseeds Weed management.

Ano: 2004

URL: http://orgprints.org/3936/1/3936.doc

Hansen, Preben Klarskov; Rasmussen, Ilse A..

Forsøgsplan for forsøg med ukrudtskonkurrenceevne i BAROF.

Tipo: Report

Palavras-chave: Weed management Breeding; Genetics and propagation Cereals; Pulses and oilseeds.

Ano: 2003

URL: http://orgprints.org/1487/1/WP2_100703.pdf

Hvad er en god vårbyg til økologisk jordbrug?

Long-term organic crop rotation experiments for cereal production – yield development and dynamics

Gennemgang af hvad en god vårbygsort er for økologisk jordbrug

Tipo: Report

Palavras-chave: Cereals; Pulses and oilseeds Breeding; Genetics and propagation.

Ano: 2003

URL: http://orgprints.org/1489/1/Markbrochure_BAROF_2003_enk.pdf

Askegaard, Margrethe; Olesen, Jørgen E.; Rasmussen, Ilse A..

A crop rotation experiment was established in 1996/97 at three locations representing different soil types and climates. Three factors were tested: i) crop rotation with different proportions of N2-fixing crops, ii) with and without a catch crop, and iii) with and without animal manure. A green manure crop increased yields in the following cereal crops, but at the rotational level, total yields were larger in crop rotations without a green manure crop. There were positive effects of animal manure and catch crops on yield. However, except for the coarse sandy soil, the yield effects of catch crops and animal manure decreased over time when a grass-clover green manure was included in the rotation. It appeared that the buffering effect of clover can...

Fact sheets for editors in Organic Eprints

Palavras-chave: Crop combinations and interactions; Specific methods.

Ano: 2005

URL: http://orgprints.org/4805/4/Askegaard_etal_4p_revised%2Ded.doc

Nitrogen use efficiency of cereals in arable organic farming

There are many editors of different kinds in Organic Eprints, such as conference editors, institutional editors, project editors and, in particular, 33 national editors. Regularly new editors arrive and these fact sheets are meant to help new editors carry out their editor functions. Note that some of these fact sheets are under revision because they are partly outdated or incomplete, and that revised versions will be made avaialable here when they are finished.

Tipo: Teaching resource

Palavras-chave: Knowledge management.

Ano: 2011

URL: http://orgprints.org/29426/7/Organic%20Eprints%20Help%20for%20Editors_v2.pdf

Olesen, Jørgen E.; Rasmussen, Ilse A.; Askegaard, Margrethe.

The effect of nitrogen (N) supply and weeds on grain yield of spring barley, winter wheat and winter rye was investigated from 1997 to 2004 in an organic farming crop rotation experiment in Denmark on three soil types varying from coarse sand to sandy loam. Two experimental factors were included in the experiment in a factorial design: 1) catch crop (with and without), and 2) manure (with and without). The apparent recovery efficiency of N in grains (nitrogen use efficiency, NUE) from NH4-N in applied manure varied from 29 to 38% in spring barley and from 23 to 44% in winter cereals. The NUE of above-ground N in catch crops sampled in November prior to the spring barley varied from 16 to 52%, with the highest value on the coarse sandy soil and the lowest...