对界面生态学的概念、界面生态学的主要研究内容、界面生态学在农林复合生态系统中的应用进行了系统的论述 ,农林复合生态系统中树木与农作物的作用机制主要体现在以空气为介质的光、热、水分竞争的地上界面和以土壤为介质的养分、水分竞争的地下界面上 .界面上物质、能量、信息的交换和传递反映了农林复合生态系统中树木和农作物的作用机理 . The concept of interfacial ecology, the main research content of interfacial ecology and the application of interfacial ecology in agroforestry ecosystem are systematically discussed. The mechanism of the interaction between trees and crops in agroforestry ecosystem is mainly embodied in the air as medium Of light, heat, water competition in the ground above the interface and soil-nutrient and water-competitive underground interface.The exchange and transmission of matter, energy and information at the interface reflect the action mechanism of trees and crops in agroforestry ecosystem.