Modelling rotations: can crop sequences explain arable weed seedbank abundance?
| Autor: | J Cussans, David A. Bohan, G. T. Champion, Cathy Hawes, Stephen J. Powers, S K Mertens, Alison J. Haughton, Geoffrey R. Squire |
|---|---|
| Rok vydání: | 2011 |
| Předmět: |
0106 biological sciences
2. Zero hunger Agroforestry Biodiversity Dicotyledon Sowing 04 agricultural and veterinary sciences Plant Science 15. Life on land Biology Weed control biology.organism_classification 01 natural sciences Crop 010602 entomology Agronomy Abundance (ecology) 040103 agronomy & agriculture 0401 agriculture forestry and fisheries Arable land Weed Agronomy and Crop Science Ecology Evolution Behavior and Systematics |
| Zdroj: | Weed Research. 51:422-432 |
| ISSN: | 0043-1737 |
| DOI: | 10.1111/j.1365-3180.2011.00860.x |
| Popis: | We investigated the effects of crop sequences on monocotyledon, dicotyledon and total weed seedbank abundance. Using seedbank data sampled from the conventionally cropped part of the GB farm-scale evaluations of genetically modified, herbicide-tolerant (GMHT) crops, we asked whether it is possible to identify crop sequence effects, to identify their duration and to simplify crop sequences into crop management classes with similar effects on weed seedbanks. This work showed that it is possible to detect historical effects of past crops, sown in sequence, on weed seedbanks for up to 3 years and that crop sequences may be simplified to crop management classes describing the season of sowing, crop type and weed target for herbicide application. Model estimates for the seedbanks were validated against an independent, follow-up seedbank data set. The analysis provided abundance estimates that ranged over 3 and 1.7 orders of magnitude for the monocotyledon and dicotyledon weed seedbanks for different crop sequences. This work yields a methodology for estimating seedbank abundance in current crop sequences, potentially allowing sequences to be identified that better reconcile the competing needs for weed control to maintain crop productivity and the demand for increased farmland biodiversity. |
| Databáze: | OpenAIRE |
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