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 document describes the main results that emerged from the application of the Tool for Agroecology Performance Evaluation (TAPE) developed by FAO on the IFAD-funded Regeneration of Landscapes and Livelihoods (ROLL) project in Lesotho. TAPE provided a baseline for analyzing and comparing the performance of different types of agricultural systems across multiple dimensions of...
Lesotho
论文
2022
The increasing demand for more nutritious and safe food in Asia is creating both market opportunities and challenges for organic farmers. Obtaining access to this market requires certification, and many smallholder farmers lack the capacity to differentiate their organic products from the conventional products. This prevent smallholder farmers from profiting...
Cambodia - Lao People's Democratic Republic
报告
2019
Right to Food Newsletter of July 2021
新闻通讯
2021
Argentina
个案研究
Nutrient uptake and utilization play an important role in yield advantage of intercropping. However, the effects of nutrient and utilization on yield advantage of new intercropping systems are rarely explored in Northwest China. A field experiment was carried out to investigate those effects under maize & potato, maize & rapeseed,...
China
杂志文章
2015