FAO.org

粮农组织主页 > 生态农业知识中心 > 知 识 > 10项要素 > 效率
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

Crop row spacing in intercropping systems affects interactions of crop species and subsequent crop yields. In a field experiment, the response of crop yield to different maize row spacing (0-80 cm) in pea/maize intercropping system was investigated. The results showed that land equivalent ratio (LER) of each treatment exceeded 1,...
China
杂志文章
2012
Video presentación del 8 de setiembre del 2013 en el Curso Internacional Agroecología, Resiliencia y Seguridad Alimentaria. Evento previo al IV Congreso Latinoamericano de Agroecología SOCLA 2013.
Cuba
视频
2013
There is a great need for agriculture in China to enter an eco-transformation stage characterized by high efficiency, output safety, resource saving and environmentally friendly. In order to push forward the development of eco-agriculture, the principles for setting up policy and regulation framework in China are proposed here based on...
China
杂志文章
2015
Este libro muestra cómo diferentes actores del sistema cubano de innovación formal e informal responden al desafío que presenta la crisis del sistema alimentario mundial. Desde una visión concertada, presenta los resultados del proyecto ""Desarrollo de sistemas descentralizados y participativos de garantías ambientales en Cuba"". El texto propone un acercamiento al...
Cuba
书籍
2011
A technical package for eco-agriculture is the assembly of multiple techniques for a functional and goal-oriented agro-ecosystem management. The resources can originate from traditional agro-practices, modern agro-practices and high-tech innovations. There are inseparable, compatible, or incompatible relationships between a single technique and a specific agro-ecosystem. Also, there are mutually dependent,...
China
杂志文章
2010