Økologisk fôr

Fôr til drøvtyggere, som for eksempel kyr og sau, kan dyrkes i hele landet. I økologisk grovfôrproduksjon dyrkes ulike grasarter oftest sammen med kløver. Det meste av norsk økologisk korn brukes som karbohydratråvare til kraftfôr til både drøvtyggere og enmaga dyr. Økologiske proteinrike vekster til kraftfôr dyrkes i lite omfang i Norge, og blir derfor i stor grad importert. NIBIO forsker på dyrkingsmetoder for å oppnå gode avlinger med høy kvalitet av fôrvekster.

Økologisk-for
Foto: Steffen Adler
KONTAKTPERSON

Andre fôrvekster

NIBIO jobber med dyrkingsstratgier for økologisk produksjon av korn og proteinvekster.

Tjenester

Grovfôrmodellen

Modellen skal underveis i vekstsesongen gi støtte for valg av høstetid i to- og treslåttsystem i eng som brukes til fôrproduksjon. Den er utvikla på grunnlag av data fra timoteidominert eng, men kan også brukes på bestand dominert av fleirårig raigras.

Mer informasjon Til tjenesten
Plantevernleksikonet

Nettside med nyttig og relevant informasjon om biologi og bekjempelse av planteskadegjørere (ugras, sykdommer og skadedyr). Du finner også informasjon om biologien til en del nyttedyr av plantevernbetydning.

Mer informasjon Til tjenesten

Publikasjoner

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Sammendrag

Effects of wilting rate and fermentation stimulators and inhibitors on protein characteristics of forages typ- ical for organic production were assessed using tradi- tional analytical methods and a gas production in vitro assay. The hypotheses were that the proportion of the crude protein (CP) fraction that was soluble would be lowest, and the protein feed value highest, under rapid wilting and restricted fermentation. The solubil- ity of the CP fraction varied according to treatments and between a first and a second cut, with moderate and high content of clover respectively. It was, how- ever, of minor importance for the protein value, both calculated as amino acids absorbed in the small intes- tine (AAT 20 ) and estimated as effective utilizable crude protein (uCP 04 ) by the in vitro assay. In ensiled her- bage, AAT 20 was highest in rapidly wilted and restrict- edly fermented silages made from a first cut dominated by highly digestible grasses. Silages from the second cut dominated by red clover were far lower in AAT 20 . The in vitro assay did not separate silages according to herbage composition or wilting rate, but ranked restrictedly fermented above extensively fer- mented with regard to protein supply. The assay might still have caught the characteristics that determine the true protein value in vivo.

Sammendrag

A meta-analysis based on experiments in organically cultivated grasslands in Norway was conducted to quantify the effects of management factors on herbage yield and feed quality. A dataset was collected that included 496 treatment means from experiments in five studies carried out at eight locations with the latitude range of 58.8 to 69.6 N between 1993 and 2010. We tested the effect of harvesting system (two vs. Three cuts annually), plant developmental stage at the first cut, growth period (temperature sum) and the herbage clover proportion. Plant maturity at the first cut and herbage clover proportion explained to a large extent herbage yield and quality of the first cut and annual yield. The timing of the first cut influenced also the yield and herbage quality of the second cut. The analysis confirmed the importance of legumes performance for herbage yield and quality from grasslands in organic production. Estimated annual herbage DM yield harvested at standardized plant development stage and at average clover proportion was 9%higher in the two—compared to the three-cut system. The crude protein concentration and in vitro dry matter digestibility was 17 and 3 % higher and the NDF concentration 7 % lower in the annual herbage from the three-cut than from the twocut system, respectively. The empirical equations developed in this study may be applied to explore different options for grassland management as basis for ration and production planning and in scenario analysis of economic performance of individual and model farms. The equations do also reveal in numeric terms the tradeoffs in management practice between high yields, yield digestibility, NDF and crude protein content in organic forage production relying on red clover N2 fixation as the engine in the system.

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Sammendrag

I perioden mai – august 2010 ble det utført et potteforsøk i veksthus under naturlige lysforhold på Bioforsk Landvik, Grimstad. Tolv organiske gjødseltyper ble sammenlignet med mineralgjødsel (Opti KAS 27-0-0) og et ugjødsla kontrolledd. Gjødsla (4 kg N/daa) ble tilført når engsvingelplantene hadde 2-3 vegetative skudd, og virkningen på skuddutvikling, tørrstoffproduksjon og N-opptak ble registrert en, tre, seks og ti uker etter gjødsling. Pottene ble vannet tre ganger i uka, enten til feltkapasitet (ledd A) eller med dobbelt så mye vann som i ledd A,(overskuddsvanning) gjennom hele forsøksperioden. De organiske gjødseltypene som ble prøvd ut var enten i fast form (gjødsel i pulver/gryn-form eller med pellets-struktur basert på kjøttbeinmel eller hønse/kyllinggjødsel i fra Norsk Protein AS, Norsk Naturgjødsel AS, Grønn gjødsel AS og Binadan AS) eller i flytende form (Biorest fra Indre Agder og Telemark Avfallsselskap, flytende organisk gjødsel fra Vadheim Groplex og blautgjødsel av gris og storfe). [...]

Prosjekter

Project image
FORUT-Nutrient supply and productivity in organic forage and milk production - improved forage production based on local resources


Organic milk production has become more intensive, which has led to increased focus on forage quality. The primary growth (PG) is harvested at an earlier stage of development with the consequence that more than half of the total yearly yield is from the regrowth (RG). The RG contains high proportion of clover. Thus, the RG forage has likely high crude protein content, while the PG forage has high energy value but low protein content. The use of fish meal as feed is now prohibited and alternative feed protein sources are expensive. The value of on-farm grown forage is therefore becoming even higher. The project aims to bring to light knowledge that makes dairy farmers better prepared to produce forage in high quantities and qualities as allowed by local climate and resources, adapt forage and milk production better to these constraints, and to assess the economics, resource use and environmental impacts linked to forage production and feed rations with high forage quality. Specifically, the research conducted in the project seeks to answer the following questions: - When ought the RG to be harvested? - Are early red clover varieties better suited than late ones to sustain high yields and even out differences in forage yield and quality between cuts in intensive harvesting regimes? - Will other grasses than timothy and meadow fescue perform better as companion species to red clover under intensive harvesting regimes? Are grass species and variety mixtures that have less synchronous generative development to be chosen? - How should forage with high clover proportion be preserved in order to attain high forage protein quality? - Is it possible to utilize that PG and RG silages have different quality by mixing them in certain proportions at feeding? - What is won and what is lost in economic terms when forage production is intensified? - Will a mixing of PG and RG silages at feeding reduce methane emission and nitrogen loss in the cow and from the slurry storage

Finished Updated: 16.02.2017
End: sep 2015
Start: jan 2011