永续农业系统

永续农业（Permaculture）一词由“永久农业”（permanent agriculture）和“永久文化”（permanent culture）组合而成，是一种旨在创造可持续、自给自足的人类居住环境的设计理念。它由澳大利亚人比尔·莫里森（Bill Mollison）和大卫·霍姆格伦（David Holmgren）于20世纪70年代创立，其灵感源于自然生态系统的韧性、稳定性和多样性。永续农业并非一种具体的耕作技术，而是一个整体性的设计框架，通过互惠互利的协同作用，将土地、资源、人与环境整合起来。

The system is guided by a set of ethics (Earth Care, People Care, Fair Share) and design principles. These principles, such as “Observe and Interact,” “Catch and Store Energy,” “Use and Value Diversity,” and “Produce No Waste,” serve as tools for thinking about and designing systems. A key concept is “stacking functions,” where a single element in a design serves multiple purposes. For example, a pond can provide irrigation water, support aquaculture, attract beneficial insects, and create a microclimate. Another core idea is “zoning,” which involves placing elements of the design based on how frequently they are used or need attention, minimizing energy expenditure. Permaculture seeks to create closed-loop systems where the outputs of one component become the inputs for another, mimicking the waste-free cycles of nature.