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

It is generally accepted that agriculture is a major driver of climate change as well as being acutely challenged to adapt to its effects. Agroecological approaches involve the application of integrated ecological, economic and social principles to the transition of smallholder farming systems, towards greater resilience. This involves adapting 13...
工作文件
2019
In this latest book in the Reclaiming Diversity and Citizenship Series published by the Centre for Agroecology, Water and Resilience, Zhenzhong Si offers a new perspective on how to shift from industrial agriculture to diversified agroecological systems in China. This book draws upon the framework of the IPES-Food report (from Uniformity to Diversity) to review...
China
书籍
2019
Participatory Guarantee Systems (PGS) have been established to help the hundreds of smallholder farmers in India who are unable to gain cost-prohibitive certifications for organic farming. These systems allow access to a fair and transparent market system and grant farmers a direct stake holding in the supply chain of clean...
India
个案研究
2017
Large, decimated ecosystems can be restored. Bringing large areas back from environmental ruin is possible, and the results are key to stabilizing the earth's climate, eradicating poverty and making sustainable agriculture a reality. Under the guidance of a few people who have knowledge and vision, local uneducated rural poor can...
China
视频
2012
In Cambodia, small-scale farmers are facing the issue of low economic returns from their rice farming because of low productivity and high input costs. The system of rice intensification (SRI) allows farmers to use less inputs. In dry areas, SRI could result in an average yield of 3.6 tonnes/ha, while...
Cambodia
创新
2018