René Gislum

Anvendelse af droner med kamera til bestemmelse af afgrødeindeks i græsfrø afgrøder / The use of drones with camera to determine crop index in grass seed crops

Research output: Contribution to book/anthology/report/proceedingArticle in proceedingsResearch

Kvælstof (N) er vigtig for at opnå høje frøudbytter, men N kan samtidig have en negativ indvirkning på det omgivne miljø. Mange forskere og firmaer arbejder på at udvikle metoder hvorpå man kan optimere udnyttelsen af N i landbrugsafgrøder. En af metoderne som testes i øjeblikket er anvendelsen af afgrøde indeks til at prædiktere frøudbytte eller bestemme mængden af N der skal tilføres for at opnå maksimalt frøudbytte. Afgrøde indeks kan bestemmes ved brug af sensorer blandt andet dronemonteret kamera. Foreløbige resultater fra Aarhus Universitet, Flakkebjerg viser, at dronemonteret kamera med en pixelstørrelse på ca. 5*5cm er i stand til bestemme ’normalised difference vegetation indeks’ (NDVI) med stor præcision og nøjagtighed. Fordelene ved at anvende droner er, at metoden er langt hurtigere og langt mere detaljeret end metoden med traktor monterede sensorer. Ulempen er, at man er langt mere afhængig af vindstille vejr. Vi fortsætter arbejdet med at anvende drone monteret kamera til bestemmelse af NDVI i frøgræs afgrøder og fokusere blandt andet på at gøre billede processeringen mere automatisk. Vi arbejder også på at fjerne randeffekten i parcellerne for at få et bedre estimat for gennemsnits NDVI værdierne på parcel niveau.

Nitrogen (N) is important to achieve high seed yields however N can at the same time have a negative impact on the surrounding environment. Many scientists and companies are working to develop a method that is able to optimise the utilisation of N in agricultural crops. One method that is current being tested is the use of crop index to predict seed yield or the N-application rate necessary to achieve maximum seed yield. Crop index can be determined by the use of sensors among them drone mounted cameras. Preliminary results from Aarhus University, Flakkebjerg shows that drone mounted cameras with a pixel size of 5*5cm are able to measure normalised difference vegetation index (NDVI) with great precision and accuracy. The advantages of using drone mounted cameras are that the method is much faster and far more detailed than the method of using tractor mounted sensors. The disadvantage is that we are much more dependent of windless weather. We continue our work using the drone mounted camera to measure NDVI in grass seed crops and focus among other things on making the image processing more automatic. We are also working to remove the edge effect of plots to get a better estimate for average NDVI values on a plot level.
Original languageDanish
Title of host publicationProceedings of the 16th Nordic herbage seed production seminar : NJF seminar 491. 20 – 22 June 2016, Grimstad, Norway
Number of pages4
Publication yearJun 2016
Pages57-60
Publication statusPublished - Jun 2016
Event16th Nordic herbage seed production seminar: NJF Seminar 491 - Grimstad, Norway
Duration: 20 Jun 201622 Jun 2016
http://njf.nu/seminar-summaries/ny-seminar-summary-page-6/

Seminar

Seminar16th Nordic herbage seed production seminar
LandNorway
ByGrimstad
Periode20/06/201622/06/2016
Internetadresse

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