在实地观测的基础上，分析了不同下垫面性状对农林系统微生态环境的影响。结果表明：冬季覆盖有利于提高农林系统的土壤温度，减轻冻害；春季桃园套种黑麦草可减缓土壤和近地气层的温度波动；新垦桔园套种有利于减少土壤流失，如黑麦草套种区平均土壤侵蚀量是自然裸露区的１４．７％，并提高光能利用率０．８２％～１．０２％；成龄桔园合理套种不仅提高光能利用率、改善土壤肥力，而且使柑桔产量提高了４６．８８％。 Based on the field observations, the effects of different underlying surfaces on the micro-ecological environment of agroforestry systems were analyzed. The results showed that winter coverage could improve the soil temperature in agroforestry system and alleviate the frost damage. In spring, the interplanting of ryegrass in Taoyuan could slow down the temperature fluctuation in the soil and the near-field gas reservoirs. The average amount of soil erosion was 14.7% of the bare area and the light energy utilization rate was increased from 0.82% to 1.02%. The reasonable intercropping of mature orchards not only increased the light energy utilization and soil fertility, Orange production increased by 46.88%.