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

This handbook aims to provide land activist groups with hope and inspiration and systematic, hands-on practical knowledge about various approaches and strategic options based on real, successful stories and experiences. In each approach, different examples illustrate various concrete applications, giving a clear overview of tools that can be used to...
报告
2020
El grupo Agrolab está formado por profesionales de diferentes ámbitos (agronomía, medio ambiente y  comunicación) que venimos trabajando de forma colaborativa para tratar de generar debate, crítica y reflexión sobre los sistemas alimentarios existentes en la ciudad y la relación entre el campo y la ciudad. El reto principal es...
Spain
网站
Alain Karsenty, an environmental economist, has been a Senior Scientist at CIRAD (Montpellier, France) since 1992. His research and expertise area are focused on economic instruments for the environment. He has extensive knowledge of land tenure, concessions, forest policies, and practices in West & Central Africa and Madagascar, his main...
视频
2021
Sandeep Narayan Jamjade is a farmer residing in Jalochi Village, Baramati, and Pune, India. He is 37 years old with a family of 11. He started his farming venture when he was 24. It took him years of trial and error to adopt various practical solutions leading to ecologically sustainable agricultural...
India
杂志文章
2021
The paper discusses the integration of social sciences views into agroecology as the basis for an interdisciplinary research approach on natural resource management and rural development in the Latin-American tropics. As a disciplines that integrates ecological concepts for managing anthropogenic ecosystems, agroecology is a sound ground to promote innovative processes in...
Costa Rica
杂志文章
2002