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 open access book provides a panoramic view of the evolution of Spanish agriculture from 1900 to the present, offering a more diverse picture to the complex and multidimensional reality of agrarian production. With a clear transdisciplinary ambition, the book applies an original and innovative theoretical and methodological tool, termed Agrarian Social...
Spain
书籍
2019
Agroecology Europe (AEEU) is an international association of members who wants to exchange knowledge and experiences on agroecology, place agroecology high on the European agenda, and support the transition toward agroecological practices, sustainable food systems, and policies. To support exchange, reflection, and bottom-up contributions, Agroecology Europe is organizing together with local farmers,...
活动
2021
This course will explore what agroecology is, what the different approaches are and how they translate into agricultural practices. In a participatory training dynamic, based on the social and geographical diversity of the actors, the MOOC proposes to build an approach to agroecology from the perspective of agronomic sciences, ecology...
Argentina
学习
2022
This video depicts the third session of the second day of the regional consultation on ‘’Engaging with Academia and Research Institutions (ARIs) to support Family Farmers and Food System Transformation during and post COVID-19 Pandemic in Asia’’ held on  8 and 9 December 2021. The video presents the role of actor-networks in enabling...
视频
2021
Capital Growth, a food growing network, presents people with the opportunity to grow food as part of a healthy, resilient food system. During the pandemic in 2019/2020, Capital Growth worked with over 50 gardens to grow food for the local community through their Community Harvest Initiative. This video tells their stories...
视频
2021