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

Despite a growing civic movement to create spaces for urban agriculture (UA) in U.S. cities, public investment remains both inequitable and inadequate to support the diverse practices and practitioners growing food locally. As a result, outcomes of UA initiatives are uneven, ad hoc, and often the result of resistance and...
United States of America
杂志文章
2020
The Mi Huerto Web uses technology to create a fairer and more direct relationship between producers and consumers, supporting an inclusive, local and sustainable agriculture. "We are convinced that is fundamental to be conscience about what and how we eat, to be responsible towards our neighboring producers. We need to establish...
Chile
网站
2014
The Fouta Djallon Farmers' Federation in Guinea has chosen to turn to agroecology in order to better respond to the climatic, economic and food challenges faced by farming communities. The first episode of "Entrance to Agroecology" explains the difficulty of orienting farmers to agroecology without first checking its true effectiveness....
Guinea
视频
2020
Regenerative agriculture’ captures a diverse range of land management and agricultural techniques and practices, which have in common a principled and ethical commitment to caring for the land to support its health and vitality. Regenerative agriculture (more commonly known as agroecology outside Australia) is not new. There are scholars around the world looking at...
杂志文章
2019
The importance of Agroecology to advance the sustainability of cotton production systems in agricultural schools in Paraguay and in communities of indigenous peoples of Bolivia. Associated with the concept that sustainable production systems is  the key to reducing the impact on natural resources and thus achieving the SDGs, since 2014 the regional...
Brazil
项目
2019