生态农业知识中心

效率:创新型生态农业方法用更少的外部资源带来更高的产出

提升资源利用效率是生态农业系统的一项新属性,通过仔细规划和管理多样性,在系统各构成部分之间形成协同效应。比如,效率方面的一项关键挑战在于全球农田中施用的氮肥仅有不到50%转化为收获产品,其余部分损失在环境中,导致严重的环境问题。

生态农业系统改善对自然资源,尤其是丰富和免费资源的利用,如太阳辐射、大气中的碳和氮元素等。通过促进生物过程以及生物质、营养素和水的循环使用,生产者能够用更少的外部资源,降低成本并减轻资源利用所产生的负面环境影响。最终,减少对外部资源的依赖能够通过提升生产者的自主能力和应对自然或经济冲击的抵御力来赋予其权能。

衡量综合性系统效率的一种方法是土地当量比。土地当量比对比了两种或以上品种(如作物、林木、家畜)共同种养时的单产以及通过单作实现的单产水平。综合性系统往往展示出更高的土地当量比。

因此,生态农业通过必要的生物、社会经济和机构多样性,以及与时空的匹配来推动农业系统,支持提高效率。

 

Database

The initiative is situated in Gamo Zone, in the Southern Nations, Nationalities and People’s Region. The Shella Mella cooperative established in 2013. The cooperative supports its 200 members in shifting from a conventional to organic production, with on-going support from the Pesticide Action Network (PAN). The cooperative supports its members in...
Ethiopia
创新
2021
‘Sustainable intensification’ is now often used to describe the future direction for agriculture and food production as a way to address the challenges of increasing global population, food security, climate change and resource conservation. There is a growing consensus that sustainable intensification should not only avoid further environmental damage, but...
报告
2015
The Androy region, in southern Madagascar, is known as a semi-arid climate region, with high variability in rainfall and regularly suffers from droughts. As noted above, environmental issues (droughts, rainfall) drive several disturbances, affecting frequently the production systems in the region and livestock activities.   In response to climate vulnerability, there is...
Madagascar
视频
2020
Visual narratives using the 10 Elements of Agroecology can guide the holistic visioning needed to better understand transformative change and plausible transitions towards sustainable agriculture and food systems. By sharing similar underlying storylines, assumptions, and responses to drivers of change, visual narratives may foster the convergence of transitions into typologies that...
工作文件
2023
Agroecology Newsletter of April 2022
新闻通讯
2022