现代农业的基本特点是把农业生产技术和经营管理建立在科学的基础上,创立一个速生、高产、优质、低耗的农业生产系统和良性农业生态系统。本文拟就现代农业生态系统中的低等级下较低层次结构中营养物质的多重微循环问题进行讨论。 一、微循环的概念 农业生态系统与自然系统不同 The basic feature of modern agriculture is to establish agricultural production technology and management based on science and create a fast-growing, high-yielding, high-quality and low-consumption agricultural production system and a benign agro-ecosystem. This article intends to discuss the issue of multiple microcirculation of nutrients in lower-level structures in modern agro-ecosystems. First, the concept of microcirculation Agricultural ecosystems and natural systems are different