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

Intercropping is one of the traditional farming systems practiced by farmers in China for more than 2,000 years with some intriguing ecological principles. Previous studies have shown that intercropping enhances not only crop productivity but also the efficient utilization of resources, both above-ground and below-ground. Recent research efforts have made...
China
杂志文章
2016
This paper presents five main messages and key recommendations of a dialogue that explored opportunities and limitations of agroecology to address conservation needs beyond the farm. The messages hereby presented look beyond classical on-farm conservation approaches (e.g. conservation of local crop varieties and crop wild relatives) and focus instead on...
政策简报
2023
El estudio presenta los resultados del estado y desempeño de la sustentabilidad de sistemas productivos de la Asociación de Caficultores Orgánicos de Colombia ACOC, mediante once indicadores locales relacionados con los recursos y la operación del sistema, comparando resultados para dos ciclos de evaluación en 2005 y 2010. Las evaluaciones se...
Colombia
杂志文章
2015
The Collaborative Program of Research in Crops (CCRP) of the Mcknight Foundation and the Latin American Council of Social Sciences (CLACSO) invite to participate in this Call for advanced masters or doctorate students who are doing their thesis in Andean agroecological systems of Bolivia , Ecuador and Peru, in sites...
学习
2019
The "International Symposium on Agroecology for Sustainable Agriculture and Food Systems in China" was organized in August 2016 by the Chinese Academy of Agricultural Sciences (CAAS), FAO, and Yunnan Academy of Agricultural Sciences (YAAS), with the support of the Government of France. The symposium Gathered 221 participants from 25 countries (representing...
China
会议记录
2017