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

Smallholder farmers in Gambia are increasingly facing climate related induced disasters and vulnerabilities affecting their lives and livelihoods. During 2010-2012, farmers faced flash floods, periods of drought, disease infestation, saline intrusion, deforestation and massive erosion of their farmlands resulting in crop failure and reduced food security. ActionAid has introduced agroecological...
Gambia
个案研究
2017
This film examines a cooperative of the Brazilian Landless Movement (MST) in the South of Brazil, which struggled for access to land and then transitioned to ecological agriculture, or agroecology. This MST cooperative is demonstrating the possibility of an alternative model of flourishing rural life, which provides thriving livelihoods for...
Brazil
视频
2014
Documentaries on the Best Practices in Rural Development carried out by young farmers that have been granted support under EU Rural development policies.
Italy
视频
2015
While India was home to more than 100,000 rice varieties only 50 years ago, today more than 80% of the area dedicated to grow rice is planted with hybrid varities. Thanks to the efforts of about 1,400 farmers in the Koraput region (Odisha state), traditional varieties of "desi dhaan", as they...
India
论文
2017