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Optimal site-specific fertilization and harvesting strategies with respect to crop yield and quality response to nitrogen

机译：关于作物产量和氮素质量响应的最佳特定地点施肥和收获策略

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摘要

Incorrect fertilizer decisions can be costly if quality of the output, in addition to yield, is influenced by the application rate, which contrasts the flat payoff function estimated for fertilizer by previous studies focusing only on quantity. This study aims at modelling economic potentials of the combination of site-specific fertilization and quality specific harvesting at the example of wheat (Triticum aestivum in Germany. Crop yield and protein response data to different nitrogen fertilizer applications were used from 15 locations to simulate site-specific wheat management. Four different management strategies were compared using a step wise price function for wheat qualities: uniform management, completely separate management, site-specific fertilization with uniform harvest, uniform fertilization with quality-specific harvest. It was found that opportunity costs (>50 (sic)/ha) may apply, if threshold values for crop qualities are missed. Separation of different qualities can reduce this risk and create incentives for producing higher qualities on heterogeneous fields. Completely separate management had an economic advantage of up to 30 (sic)/ha for the gross revenue, while site-specific fertilization alone had only marginal economic effects. However, these advantages have to cover costs for the use of technologies used, to be economically preferable
机译：如果产量和产量都受施肥量的影响，那么不正确的肥料决策可能会付出高昂的代价，这与以往只关注数量的研究对肥料的固定收益函数形成了对比。这项研究旨在模拟以特定地点施肥和质量特定收获相结合的经济潜力，例如小麦（德国Triticum aestivum）。从15个地点使用作物产量和蛋白质对不同氮肥施用的响应数据来模拟具体的小麦管理。使用逐步价格函数针对小麦品质比较了四种不同的管理策略：统一管理，完全独立管理，统一收获的现场施肥，统一质量收获的施肥。发现机会成本（如果错过了作物品质的阈值，则> 50（sic）/ ha）可能适用，不同品质的分离可以降低这种风险，并为在异质田地生产更高品质的产品提供动力，完全分开的管理具有高达30的经济优势（sic）/公顷的总收入，而仅针对特定地点的施肥主要经济影响。但是，这些优势必须覆盖使用所使用技术的成本，在经济上是可取的

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