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首页> 外文期刊>Archives of Agronomy and Soil Science >How to enhance crop production and nitrogen fluxes? A result-oriented scheme to evaluate best agri-environmental measures in Veneto Region, Italy
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How to enhance crop production and nitrogen fluxes? A result-oriented scheme to evaluate best agri-environmental measures in Veneto Region, Italy

机译：如何增强作物生产和氮素势态？ 以意大利威尼托地区评估最佳农业环境措施的结果导向方案

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摘要

The cost-effectiveness of adopting agri-environmental measures (AEMs) in Europe, which combine agricultural productions with reduced N losses, is debated due to poorly targeted site-specific funding that is allocated regardless of local variability. An integrated DAYCENT model-GIS platform was developed combining pedo-climatic and agricultural systems information. The aim was to evaluate best strategies to improve N fluxes of agro-ecosystems within a perspective of sustainable intensification. Indicators of agronomic efficiency and environmental quality were considered. The results showed that agronomic benefits were observed with a continuous soil cover (conservation agriculture and cover crops), which enhanced nitrogen use efficiency (+17%) and crop yields (+34%), although in some cases these might be overestimated due to modelling limitations. An overall environmental improvement was found with continuous soil cover and long-term change from mineral to organic inputs (N-Leach < 10 kg ha(-1) a(-1), N-N2O emissions < 1 kg ha(-1) a(-1), soil C stock > 45 Mg ha(-1)), which were effective in the sandy soils of western and eastern Veneto with low SOM, improving the soil-water balance and nutrients availability over time. Results suggest that AEM subsidies should be allocated at a site-specific level that includes pedo-climatic variability, following a result-oriented approach.
机译：采用欧洲农业环境措施（AEMS）的成本效益，将农业生产与降低的亏损减少，由于目标特有的特定资金，无论局部可变性如何分配。开发了一个集成的Dodcent Model-GIS平台，结合了宠物气候和农业系统信息。目的是在可持续强化的角度下评估改善农业生态系统的最佳策略。考虑了农艺效率和环境质量的指标。结果表明，用连续土壤覆盖（保护农业和封面作物）观察到农艺效益，增强氮气利用效率（+ 17％）和作物产量（+ 34％），尽管在某些情况下，这些可能会受到高估建模限制。含有连续土壤覆盖的整体环境改善和从矿物到有机输入的长期变化（N-LEACH <10kg HA（-1）A（-1），N-N2O发射<1kg HA（-1） A（-1），土壤C股票> 45毫克HA（-1）），其在西部和东部威尼托的沙质土壤中具有低SOM，改善了土壤水平和营养随时间的可用性。结果表明，遵循基于结果为导向的方法，应在特定于站点特定级别分配AEM补贴。

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