Ny tørringsteknik kan gøre økologisk korn bedre

Økologisk dyrket korn lader til at være mere udsat for angreb af svampe og toksiner end det konventionelt dyrkede. Tromletørring af kornet ved bestemte temperaturer kan være en løsning på problemerne

Tromletørring skal sikre kvalitetskorn

Svampevækst i korn kan forringe kvaliteten og i værste fald gøre det sundhedsskadeligt for både dyr og mennesker. Nye forsøg viser, at tromletørring kan reducere svampeforekomsten markant uden i øvrigt at forringe kvalitete

Intra-Row Weed Control by use of Band Steaming

Disinfection of the soil by means of steaming has been a common method for eliminating weeds and fungal diseases. However, surface steaming of soil is a very energy-intensive process, and consequently, efforts have been made to develop a machine for narrow-band steaming of the soil under and around rows of cultivated plants prior to seeding. The use of this machine may achieve up to 90% energy savings, and will also reduce the amount of damage to the flora and fauna. Tests have shown that soil temperatures exceeding 70C will be needed to protect against germination of weed seeds. For band heating such a treatment in 50 cm rows requires about 5.8 GJ/ha

Tørring og rensning af korn

Tromletørring kan med fordel anvendes til kvalitetskorn som brødkorn og maltbyg. Den høje behandlingstemperatur reducerer vækst af skadelige svampe på kernerne

Rækkedampning, effekter og økonomi

Der er udviklet en maskine til dampbehandling af jorden inden såning med henblik på at ødelægge ukrudtsfrøs spireevne. Princippet i maskinen er, at processen sker i et lukket kammer, som trækkes hen over det bånd der ønskes behandlet. Dampen ledes ind i kammeret og penetrerer effektivt ind i jordpartiklerne. Resultater har vist, at der kan opnås en effektiv ukrudtskontrol ved en behandlingstemperatur på 80-90 grader. Energiforbruget har ligget på ca. 400 l olie per ha. Økonomiske overslagsberegninger viser at der for et 4-rækket system vil være økonomisk balance i økologisk dyrkede gulerødder og løg ved arealstørrelser på ca. 8 ha

Tromletørring god til øko-korn

Ny tørringsteknik kan fjerne svampe fra økologisk korn

New optimized technique for mechanical control of Elymus repens

Elymus repens (coach grass) is traditionally controlled by repeated and prolonged stubble cultivation. However, the efficacy is strongly depending on weather and secondly on the exposure of rhizomes. The shorter the required period of cultivation stays the more compliance with the objective in organic farming where farmers aim at minimizing leaching of nutrients by keeping the soil plant-covered during autumn and winter. Effective technique and strategies for uprooting, exposing and destroying Elymus repens are needed. In a Danish organic research project the focus is on technological solutions for uprooting, exposing and destroying of the rhizomes within a short time span. Machines of standard type, modified machines and machines constructed for other purposes have been studied. The results show that it is difficult to achieve a high percentage of uprooting when using machines giving a high area capacity, e.g. spring loaded tine cultivator and rigid tine cultivator with modified spike discs at the rear

Overvågning af kornlagre med integrerede trådløse sensorer

Temperatur og fugtighed i korn og frø skal kendes for at sikre optimalstyring af et tørringsanlæg og for at kontrollere, at lagringen sker udenkvalitetsforringelse. Resultaterne har vist, at trådløse sensorbolde kananvendes til sikker måling af temperatur og fugtighed via måling af denrelative luftfugtighed.På grundlag af det kendte ligevægtsforhold mellem vandindhold i kornog frø og den omgivende lufts relative fugtighed og temperatur omregnesmåleresultatet for de traditionelle kornarter og en række frøarter tilafgrødens vandprocent. Måleresultaterne vedrørende vandprocent kankun anvendes, når der ikke blæses i afgrøden. For at opnå brugbareresultater kræves minimum 3 timers stilstand.En temperaturstigning i et parti korn eller frø skyldes ofte nedbrydning afvaren og vækst af skadelige svampe. Hvis temperaturen eller fugtighedenstiger, registreres det via sensorboldene. Måleresultaterne kan direkteanvendes til at styre den nødvendige tørring og køling af afgrøden.Registreringerne vil ligeledes kunne anvendes til at dokumenterelagringsbetingelserne, eksempelvis ved krav om sporbarhed.Der er i forsøgene anvendt et totrins datatransmission set-up, hvor enrække sensorer enten direkte eller gennem en nabosensor sender datatil en basestation, hvorfra data trådløst videresendes til en internetserver,således at resultaterne kan ses på brugerens computer. Systemet harfungeret uden problemer. Trådløse sensorbolde kan således være etgodt alternativ til traditionelle systemer med faste målesensorer placereti lageret og forbundet med kabler til en kontrolboks

Kvik skal op og væk

The article deals with previous results with the ability of different implements to uproot Elytrigia repens rhizomes

Feasibility study for organic farming

Even though the ethos of organic agriculture concerns animal welfare and environmentally friendly production, certain undesirable inputs are permitted in organic farming by the European Commission Regulation (EC) No 889/2008. The EU Horizon 2020 project Organic-PLUS (https://organic-plus.net) has investigated the possibility to phase out a range of contentious inputs: Plant inputs: Copper, sulphur, and mineral oils; Soil inputs: Conventional manure, plastic, and peat; Livestock inputs: conventional straw, antibiotic medicine, and anthelmintic medicine (against parasites). Organic-PLUS has performed a feasibility study to investigate advantages and disadvantages of both the current production methods with the contentious inputs and proposed alternative methods where the- inputs have been phased out or substituted. The feasibility, sustainability and environmental impact have been evaluated involving stakeholders and decision-makers (e.g., farmers, advisers, developers). In this multi-actor approach seven case farms in Denmark (Northern Europe), Germany (Central Europe) and Spain (Southern Europe) were selected, including the following organic production branches: Pig, poultry, vegetables, cereals, potato, apple, and wine. Results of the case farm studies include: · It is feasible to replace plastic folio for weed control with alternative products (bioplastic or paper mulching) · It is feasible to replace conventional animal manure with alternative fertilizers, such as digestates from biogas production, green waste compost or organic bio fertilizer, combined with crop rotation with legumes · It is not feasible to phase out antibiotics and anthelmintics completely since sick animals must be treated. However, it is feasible to reduce the consumption significantly without reducing production quantity and quality · It is feasible to replace sulphur for apple production with organic approved fungicides · It is not feasible to phase out copper completely for the wine varieties grown today without a very large decrease in quality and yield