Onderzoek naar het effect van akkerranden op functionele ...
Onderzoek naar het effect van akkerranden op functionele ...
Onderzoek naar het effect van akkerranden op functionele ...
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Inhouds<strong>op</strong>gave<br />
<strong>Onderzoek</strong> <strong>naar</strong> <strong>het</strong> <strong>effect</strong> <strong>van</strong> <strong>akkerranden</strong> <strong>op</strong> <strong>functionele</strong> biodiversiteit en natuurlijke plaagbeheersing<br />
1. DOEL EN SITUERING OPDRACHT ........................................................................................... 5<br />
2. AANLEG DEMOVELDEN 2009 ................................................................................................ 6<br />
3. MONITORING 2009 ............................................................................................................. 10<br />
Vliegende fauna .......................................................................................................................................... 10<br />
Plaagdichtheden .......................................................................................................................................... 14<br />
4. AANLEG DEMOVELDEN 2010 .............................................................................................. 21<br />
Locatie demoranden .................................................................................................................................... 21<br />
Ingezaaide mengsels ................................................................................................................................... 21<br />
Eenjarig bloemenmengsel ........................................................................................................................ 21<br />
Meerjarig bloemenmengsel..................................................................................................................... 24<br />
Ontwikkeling bloemenranden .................................................................................................................... 24<br />
Meerjarige bloemenrand ........................................................................................................................ 24<br />
Eenjarige bloemenranden ....................................................................................................................... 27<br />
5. MONITORING 2010 ............................................................................................................. 30<br />
Bodemfauna .................................................................................................................................................. 30<br />
Overwintering in grasranden .................................................................................................................. 30<br />
Verspreiding <strong>naar</strong> de akker ................................................................................................................... 34<br />
Predatiecapaciteit ....................................................................................................................................... 34<br />
Proef<strong>op</strong>zet .................................................................................................................................................. 34<br />
Resultaten .................................................................................................................................................... 36<br />
Vliegende fauna .......................................................................................................................................... 39<br />
Natuurlijke vijanden in bloemenranden vs. grasrand ........................................................................ 39<br />
Invloedsfactoren <strong>van</strong>gstresultaten .......................................................................................................... 40<br />
Vangstresultaten nuttige kevers ............................................................................................................. 42<br />
Plaagdichtheden .......................................................................................................................................... 44<br />
Graanhaantje ............................................................................................................................................ 45<br />
Bladluizen ................................................................................................................................................... 47<br />
6. AANLEG DEMOVELDEN 2011 .............................................................................................. 51<br />
Locatie demoranden 2011 ........................................................................................................................ 51<br />
Ingezaaide mengsels ................................................................................................................................... 51<br />
Eenjarig bloemenmengsel ........................................................................................................................ 51<br />
Meerjarig bloemenmengsel..................................................................................................................... 54<br />
Ontwikkeling bloemenranden .................................................................................................................... 54<br />
Meerjarige bloemenrand (zaai 2011) ................................................................................................. 54<br />
Meerjarige bloemenrand (zaai 2010) ................................................................................................. 56<br />
Eenjarige bloemenranden ....................................................................................................................... 59<br />
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