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 poster describes various innovative sustainable practices used in agroecology. It provides brief information on pollination, natural pest control, crop-livestock integration, soil biodiversity, water management, forest management, nitrogen fixing and other ecological, economic and social principles and techniques of agroecology.
情况说明书
2016
This 6-week course aims at helping you discover what agroecology is, through the complexity of the various approaches that have emerged over the years and in various regions of the world, and through the ways, they can be implemented in the fields, and studied, as agricultural practices. The syllabus is designed...
学习
2022
Agroecology Newsletter of August 2022
新闻通讯
2022
During the International Symposium on Agroecology for Food Security and Nutrition, held at FAO headquarters in Rome on 18 and 19 September 2014, stakeholders representing governments, civil society, science and academia, the private sector, and the UN system gathered to discuss the contribution of agroecology to sustainable food systems. The...
会议文件
2015
This video was developed by the Coalition on Agroecology for the United Nations Food Systems Summit. It highlighted the essential role of adopting agroecological practices to ensure global food security. The video also stressed the importance of the government's role in creating and adopting bold policies that will support agroecological...
视频
2021