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The impact of long-term organic horticultural systems on energy outputs and carbon storages in relation to extreme rainfall events
European Journal of Agronomy ( IF 4.5 ) Pub Date : 2024-10-18 , DOI: 10.1016/j.eja.2024.127398
Alessandro Persiani, Mariangela Diacono, Francesco Montemurro

Enhancing resilience of agroecosystems of Mediterranean area is a challenge that involves both researchers and different stakeholders and, in this context, increasing crop diversity by redesigning agricultural systems can be considered among the most important tools. Therefore, the response of agroecological practices to climate change effects was tested in a long-term experiment on organic horticultural crops (MITIORG), which is characterized by a soil hydraulic arrangement in ridges, strips and the use (with different management options) of cover crops within cash crops rotations. The main objective of this study was to show how powerful is the sustainability assessment of agroecological practices by converting crops yield and biomass into energy outputs and carbon storages, in diversified horticultural systems. The obtained outputs (expressed in energy and carbon equivalents) were evaluated and analyzed considering the site-specific meteorological data in more than 10 horticultural cropping cycles, from autumn-winter 2014–15 to autumn-winter 2020–21. The Ridge and Strips (RS) system 1 (RS1 - cover crops as living mulch on ridges and break crops in strips, both with no-till termination) showed an enhancement of about 18 % of energy output and carbon (C) storages compared to RS2 (ridges and strips with green manured cover) when extreme precipitation events occurred. Moreover, RS3 (ridges and strips without cover crops) recorded a reduction of about 5 and 9 % of energy output and C storage, respectively, compared to the mean of RS1 and RS2 in periods with extreme events. Our results highlighted that using more diversified agroecological systems improved their overall average outputs, ensuring greater resilience during extreme weather events, since at least part of crop productions was safeguarded. Therefore, it is important to combine techniques that allow long-term resilience, such as choosing and well managing cover crops (agroecological service crops), according to site and systems specific conditions.

中文翻译:


与极端降雨事件相关的长期有机园艺系统对能源输出和碳储存的影响



增强地中海地区农业生态系统的复原力是一项涉及研究人员和不同利益相关者的挑战,在这种情况下,通过重新设计农业系统来增加作物多样性可以被视为最重要的工具之一。因此,在有机园艺作物 (MITIORG) 的长期实验中测试了农业生态实践对气候变化影响的响应,其特征是在田埂、条带中进行土壤水力布置,并在经济作物轮作中使用(具有不同的管理选项)覆盖作物。本研究的主要目的是通过在多元化园艺系统中将作物产量和生物质转化为能源产出和碳储存来展示对农业生态实践的可持续性评估有多么强大。根据 2014-15 年秋冬至 2020-21 秋冬 10 多个园艺种植周期的特定地点气象数据,对获得的产出(以能源和碳当量表示)进行评估和分析。当极端降水事件发生时,田埂和条带 (RS) 系统 1(RS1 - 覆盖作物作为田埂上的活覆盖物和条状中断作物,均采用免耕终止)显示,与 RS2(带有绿肥覆盖的田嵴和条带)相比,能量输出和碳 (C) 储存增加了约 18%。此外,在极端事件期间,与 RS1 和 RS2 的平均值相比,RS3(没有覆盖作物的垄和条带)分别减少了约 5% 和 9 % 的能量输出和 C 存储。 我们的研究结果强调,使用更多样化的农业生态系统提高了它们的总体平均产量,确保了在极端天气事件中具有更大的弹性,因为至少部分作物生产得到了保护。因此,重要的是要结合能够实现长期弹性的技术,例如根据场地和系统的具体条件选择和管理良好的覆盖作物(农业生态服务作物)。
更新日期:2024-10-18
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