FAO.org

粮农组织主页 > 生态农业知识中心 > 知 识 > 10项要素 > 效率
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 acceleration of ecological crises has driven a growing body of thinking on sustainability transitions. Agroecology is being promoted as an approach that can address multiple crises in the food system while addressing climate change and contributing to the Sustainable Development Goals. Beyond the more technical definition as, “the ecology...
杂志文章
2019
Towards just, resilient and sustainable food systems
网站
2019
This technical guide provides details of numerous techniques specific for tropical wet zones. It describes the core principles of agroecology, distilling local knoweldge accumulated by family farming. This guide is designed as a support tool for technicians and farmers involved in actions to promote and develop agroecology and consists of two...
准则
2017
In an inspiring and emotive talk, Diego González reflects on the current agricultural practices, how those impact on food losses and how to save local, smallholder farmers from the preassures arising from big food distributors.
Chile
视频
2017
In this video Nepalese farmers explain how they learned, after an FAO training course, to use bio-pesticides instead of the chemical ones.
Nepal
视频
2016