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 video is part of the training resources on ''Agroecology in the 2021-2027 Multi-annual Financial Framework of the European Commission's Directorate-General for International Partnerships (DG INTPA)". The video explains the role of agroecology in building resilience against climate change and disease outbreaks by combining different plants and animals based on...
视频
FAO held, with the support of France, the Swiss Development Cooperation and the Foreign Office of Agriculture of Switzerland, the International Symposium on Agroecology for Food Security and Nutrition at its headquarters in Rome on 18 and 19 September 2014 and a side-event on the Symposium during COAG on 30...
会议记录
2014
"Prevailing agricultural practices such as mono-cropping decrease soil moisture content, causing tremendous stress on water resources. Agriculture, today, accounts for almost 70 per cent of the world’s freshwater consumption. The use of external inputs by adoption of uniform, hybridised, and genetically modified crop varieties erodes genetic diversity of seeds, and...
India
报告
2018
Rocrops is a smallholder farm established in 1990 in Trinidad. It is owned and managed by the husband and wife Ramgopaul and Beena Roop. The Rocrops farm is comprised of 1.29 ha. (3ac) of former degraded and acidic (3.5pH) sugar cane lands. The development of the farm has emphasized a...
Trinidad and Tobago
个案研究
2016
In Niger, climate change and economic factors are affecting the living conditions of agricultural producers. Distorted by the promise of better yields, many Nigerien producers have abandoned their farming practices and peasant varieties to adopt new and sometimes inappropriate practices. This case deals with black millet and white onion, two...
Niger
个案研究
2019