本文从生物量与生产力、能量转化率、营养元素利用率、价值转换效益方面对坡地林农复合系统进行了研究，并用层次分析法（ＡＨＰ）进行了综合效益评价。结果表明，复合系统与对应的对照农地系统相比，前者具有生物量、能量、营养元素、价值的积累效应和较大生物生产潜力，对辅助能、光能、营养元素利用率以及经济效益均比较好。在８个系统中，以一台地林农复合系统的综合效益为最高。

This paper studies the agroforestry systems on slopes from the biomass and productivity, the energy conversion rate,the utilization rate of nutrient elements and the efficiency of value conversion.Moreover the comprehensive benefits of them are evaluated by using the AHP.The results show that in comparison with the farmland system,the agroforestry systems have the accumulative effect of biomass,energy,nutrient elements and value,and larger productive potential.Also the economic benefit and the utilization rate of auxiliary energy,solar energy and nutrient elements in the agroforestry systems are higher.In 8 systems,the comprehensive benefit of a platfoim agroforestry system is the best.