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

This podcast mini-series entitled ‘A Feminist Journey Through Agroecology’, co-created by AgroecologyNow and International Cooperation for Development and Solidarity (CIDSE), explores the question of what food systems would look like if they were based on feminist values. When people hear the word 'feminism', they think of women, and of gender, but...
音频
2022
Agroecology Newsletter of October 2019
新闻通讯
2019
Sustainable Intensification is especially important in Africa where the need is greatest. We present eleven targets for action, paying specific attention to the needs of poor smallholder farmers in Africa. We describe multi-cropping systems integrating new crops developed from culturally-important traditional food species that intensify and enhance the productivity of...
杂志文章
2017
Abstract. The production of sufficient food for an increasing global population while conserving natural capital is a major challenge to humanity. Tree-mediated ecosystem services are recognized as key features of more sustainable agroecosystems but the strategic management of tree attributes for ecosystem service provision is poorly understood. Six agroforestry and tree...
杂志文章
2017
Farmers in Madagascar adopt agro-ecological practices A film by the Research and Development Institute and the French Global Environment Facility. In Madagascar, new farming practices are being introduced to combat climate change and maintain food security in rural areas. The French Global Environment Facility is funding a development project implemented by...
Madagascar
视频
2015