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, produced by the French TV channel "Arte", showcases the high-performance seeds used in the food industry and monoculture are a threat to the diversity of our varieties of fruits, vegetables and grains. In 100 years, we have lost 80% of cultivated species. To the chagrin of farmers, horticulturalists...
France
视频
2020
Chilling stress, one of the most important limiting environmental factors, delays plants growth and development and reduces crops yield. Chilling stress causes cell membrane damage, which triggers an excessive production of reactive oxygen species (ROS) such as superoxide (O2-), hydroxyl radicals (•OH) and hydrogen peroxide (H2O2). ROS are cytotoxic compounds...
China
杂志文章
2014
Indigenous cocoyams in Burundi have the potential to increase food and nutrition security and contribute to improved livelihoods, but farmers’ capacity to meet the growing demand for them has been constrained by a lack of good quality seed and technical knowhow. The Good Seed Initiative targeted both seed and cocoyam...
Burundi
个案研究
2019
Today, one of the major global challenges we face is that of feeding the world. Would it be possible to solve this challenge? If yes, via what pathways? Nowadays, two paradigms come up when discussing solutions to the global food challenge. One is the technical, scientific, and large-scale ‘one size fits...
论文
2022
In the northern region of Burkina Faso, where drought is a major problem, insufficient rainfall combined with poor soil conditions do not guarantee sufficient cereal production during the rainy season to cover the food needs of families. In 2004, the Association for Research and Training in Agroecology (ARFA) began experimenting with...
Burkina Faso
创新
2021