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AGRONOMIC AND ENVIRONMENTAL BENEFITS OF REINTRODUCING HERB-AND LEGUME-RICH MULTISPECIES LEYS INTO ARABLE ROTATIONS:A REVIEW

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Frontiers of Agricultural Science and Engineering 2022年第2期9卷 245-271页

作者： Emily C.COOLEDGE David R.CHADWICK Lydia M.J.SMITH Jonathan R.LEAKE Davey L.JONES School of Natural Sciences Bangor UniversityGwyneddLL572UWUK National Institute of Agricultural Botany Huntingdon RoadCambridgeCB 3 OLEUK Plants Photosynthesis and SoilUniversity of SheffieldSheffieldS102TNUK Centre for Sustainable Farming Systems Food Futures InstituteMurdochWA 6150Australia

Agricultural intensification and the subsequent decline of mixed farming systems has led to an increase in continuous cropping with only a few fallow or break years,undermining global soil ***-ley rotations incorporating temporary pastures(leys) lasting 1–4 years may alleviate soil degradation by building soil fertility and improving soil ***,the majority of previous research on arable-ley rotations has utilized either grass or grassclover leys within ungrazed *** leys,containing a mix of grasses,legumes,and herbs,are rapidly gaining popularity due to their promotion in agri-environment schemes and potential to deliver greater ecosystem services than conventional grass or grass-clover *** grazing in arable-ley rotations may increase the economic resilience of these systems,despite limited research of the effects of multispecies leys on ruminant health and greenhouse gas *** review aims to evaluate previous research on multispecies leys,highlighting areas for future research and the potential benefits and disbenefits on soil quality and livestock *** botanical composition of multispecies leys is crucial,as legumes,deep rooted perennial plants(e.g.,Onobrychis viciifolia and Cichorium intybus) and herbs(e.g.,Plantago lanceolata) can increase soil carbon,improve soil structure,reduce nitrogen fertilizer requirements,and promote the recovery of soil fauna(e.g.,earthworms) in degraded arable soils while delivering additional environmental benefits(e.g.,biological nitrification inhibition and enteric methane reduction).Multispecies leys have the potential to deliver biologically driven regenerative agriculture,but more long-term research is needed to underpin evidence-based policy and farmer guidance.

关键词： bioactive forages integrated crop-livestock systems nitrogen cycling plant secondary metabolites soil carbon soil quality

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