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首页> 外文期刊>Integrated environmental assessment and management >Characterization of Field Margins in Intensified Agro-Ecosystems-Why Narrow Margins Should Matter in Terrestrial Pesticide Risk Assessment and Management
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Characterization of Field Margins in Intensified Agro-Ecosystems-Why Narrow Margins Should Matter in Terrestrial Pesticide Risk Assessment and Management

机译：强化农业生态系统中的田间边际特性-为什么窄边际应在陆地农药风险评估和管理中发挥重要作用

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Field margins are important seminatural habitats in agro-ecosystems, but they can be negatively affected by pesticide inputs via direct overspray and spray drift. In Germany, risk mitigation measures (like buffer zones) to reduce pesticide inputs in terrestrial noncrop habitats do not have to be put in place by farmers next to narrow field margins (＜3 m width). Because data on structure, size, and width of field margins are scarce, we identified field margins in 2 German agricultural landscapes (Rhineland-Palatinate [RLP], Brandenburg [BB]; 4000 ha each) using digital orthophotos and geographical information systems. In RLP, most of the field margins were less than 3 m wide (85% of margin length and 65% of the margin area), whereas in BB narrow field margins account for 45% of the margin length and 17% of the margin area. Hedgerows were only occasionally recorded. Hence, narrow grassy field margins can represent a large part of the available seminatural habitats adjoining agricultural sites and potentially act as corridors between further habitat patches. For this reason, these margins should be protected from pesticide inputs, at least in landscapes under intensive agricultural use. Field margins are also the main, so-called nontarget habitat protected by the terrestrial risk assessment for plants and arthropods. With many (narrow) margins not considered relevant for risk management, the current practice for protecting the biodiversity from negative effects of pesticides seems questionable. More data on field margin constitution in Germany and other European countries is necessary to critically assess the current practice of pesticide risk assessment and management on a larger scale.
机译：田间边缘是农业生态系统中重要的半自然生境，但农药可能会因直接喷洒过多和喷雾漂移而受到不利影响。在德国，农民不必在狭窄的田间边缘（宽度＜3 m）旁边采取减轻风险的措施（例如缓冲区），以减少陆地非作物生境中的农药投入。由于缺乏田野边缘的结构，大小和宽度的数据，我们使用数字正射影像和地理信息系统确定了2个德国农业景观中的田野边缘（莱茵兰-普法尔茨[RLP]，勃兰登堡[BB]；每个4000公顷）。在RLP中，大多数场边界小于3 m宽（边界长度的85％和边界区域的65％），而在BB中，狭窄场边界占边界长度的45％和边界区域的17％ 。只偶尔记录了树篱。因此，狭窄的草场边缘可能代表了毗邻农业场所的可用半自然生境的很大一部分，并有可能充当其他生境斑块之间的走廊。因此，至少在集约化农业使用条件下，应保护这些边缘不受农药的侵害。田间边缘也是主要的所谓非目标生境，受到针对植物和节肢动物的陆地风险评估的保护。由于许多（狭窄的）利润被认为与风险管理无关，因此目前保护生物多样性免受农药负面影响的做法似乎值得怀疑。为了更大规模地批判性评估当前的农药风险评估和管理实践，有必要在德国和其他欧洲国家获得更多有关田间利润构成的数据。

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