Modelling rotations: can crop sequences explain arable weed seedbank abundance?

被引：56

作者：

Bohan, D. A. ^{[1
,2
]}

Powers, S. J. ^{[1
]}

Champion, G. ^{[3
]}

Haughton, A. J. ^{[1
]}

Hawes, C. ^{[4
]}

Squire, G. ^{[4
]}

Cussans, J. ^{[1
]}

Mertens, S. K. ^{[1
]}

机构：

[1] Rothamsted Res, Harpenden AL5 2JQ, Herts, England

[2] INRA, UMR Biol & Gest Adventices 1210, F-21034 Dijon, France

[3] Brooms Barn Res Stn, Bury St Edmunds, Suffolk, England

[4] Scottish Crop Res Inst, Dundee DD2 5DA, Scotland

来源：

WEED RESEARCH | 2011年 / 51卷 / 04期

基金：

英国生物技术与生命科学研究理事会;

关键词：

crop sequence; model; rotation; sowing season; crop type; herbicide management; seedbank; HERBICIDE-TOLERANT CROPS; FARM-SCALE EVALUATIONS; INVERTEBRATE ABUNDANCE; POPULATION-DYNAMICS; OILSEED RAPE; MANAGEMENT; DIVERSITY; TILLAGE; SYSTEMS; BIODIVERSITY;

D O I：

10.1111/j.1365-3180.2011.00860.x

中图分类号：

S3 [农学（农艺学）];

学科分类号：

0901 ;

摘要：

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.

引用

页码：422 / 432

页数：11

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