Flora and Fauna Changes During Conversion from Conventional to Organic Farming

Colophon

Title:
Flora and Fauna Changes During Conversion from Conventional to Organic Farming

Summary:
Flora and fauna changes during conversion to organic farming During two years the effects of conversion to organic practice was investigated in fields with spring barley and winter wheat, which were previously included in an investigation of effects of reduced pesticide dosages. For plant and insect abundance the effect of conversions is almost equal to 75% dosage reduction. However, flowering is doubled and seed amount increases by 35, a number of prey insects increase in amount and 55% Skylarks are seen. Conversion may be considered a route to increasing nature elements but local agricultural problems should also be considered.

Abstract in Danish:
Effekter på biodiversitet i agerlandet ved overgang fra konventionel til økologisk drift I to år er betydningen af omlægning til økologisk drift undersøgt i vårbyg- og vinterhvedmarker, der årene forud er anvendt til undersøgelser af nedsatte pesticiddoseringer. På artsomfang og tætheder af
planter og insekter virker omlægningen meget lig kvart dosering. Dog fordobles blomstringen, fømængden på jorden øges 35 gange og en række værdifulde bytteinsekter for fugle går yderligere frem, og der ses 55% flere lærker. Samlet kan midlertidig omlægning eller udeladelse af pesticider ses som et muligt tiltag for større naturindhold - dog med behørig hensyntagen til lokale landbrugsforhold.

Series title and no.:
Pesticides Research, 74

Publisher:
Miljøstyrelsen

Responsible institution:
Royal Veterinary and Agricultural University, Department of Ecology; Hedeselskabet Environment and Energy A/S; University of Copenhagen

Author:
Navntoft, Søren; Esbjerg, Peter; Jensen, Anne-Mette M.; Johnsen, Ib; Petersen, Bo Svenning

Language:
eng

URL:
http://www.mst.dk/

ISBN:
87-7972-913-4

Digital ISBN:
87-7972-912-6

Version:
1

Version/edition:
04-09-2003

Data formats:
html,htm,jpg,gif,pdf,css,js

Publisher category:
statslig

Key subjects:
pesticides; organic farming; boidiversity

Copyright:
Miljøstyrelsen