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 COVID-19 crisis has created a moment where existing calls for agroecology acquire new relevance. Agroecology provides a path to reconstruct post-COVID-19 agriculture, one that can avoid widespread disruptions of food supplies in the future by territorializing food production and consumption. There are five main areas in which agroecology can...
杂志文章
2020
Burkina Faso ranks as the sixth poorest country in the world according to the 2015 UN Human Development Report. Recent studies estimate that 46.4% of the population in the Eastern Region lives below the poverty line. These people are caught in a vicious cycle of degrading natural resources, declining soil...
Burkina Faso
个案研究
2016
Small-scale food producers' organizations and civil society organizations defend agroecology as a way of life of their peoples, in harmony with the language of Nature. It is a paradigm shift in the social, political, productive and economic relations in their territories, to transform the way they produce and consume food and to...
会议记录
2018
Agroecology has been gaining interest in recent years among governments, research and civil society organisations worldwide and many actors present it as a strategic pathway to transition to sustainable food and agriculture systems for achieving food security and nutrition. Following the 1st International Symposium on Agroecology for Food Security and Nutrition,...
报告
2018
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