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

The agroecological innovations reported here can be grouped under the broad heading of System of Crop Intensi cation (SCI).1 This approach seeks not just to get more output from a given amount of inputs, a long-standing and universal goal, but aims to achieve higher output with less use of or...
书籍
2014
Agroecology Newsletter of November 2021
新闻通讯
2021
Stories in this publication demonstrate how local seed systems continue to be a fundamental component of agroecology and African food systems. The Alliance for Food Sovereignty in Africa (AFSA) collaborated with journalists and writers from 14 African countries to showcase the struggle, the challenge, the hope and aspirations of seed savers...
Cameroon - Côte d'Ivoire - Ethiopia - Ghana - Kenya - Lesotho - Mozambique - Nigeria - Senegal - Togo - Uganda - United Republic of Tanzania - Zambia - Zimbabwe
书籍
2021
Using figures published by the UK Department of International Development (DFID), this study finds that despite overwhelming evidence in favour of agroecology as a mode of agricultural development able to address crucial aspects of the interrelated crises facing human societies, UK development aid barely supports agroecology. Based on the most...
United Kingdom of Great Britain and Northern Ireland
杂志文章
2018
In Latin America, hegemonic development strengthens agribusiness, whose model follows the Green Revolution with its technological packages. An alternative arises from the growing convergence of two social movements: agroecology and Solidarity Economy (EcoSol), here called EcoSol-agroecology. Their networks build short circuits, bringing producers and consumers closer together and strengthening their...
Bolivia (Plurinational State of) - Brazil
个案研究
2023