Abstract：Using the methods of static evaluation and dynamic evaluation,the economical benefits of the agro-forestry and grass-forestry system in different growth cycle in Zhuanglang County in the city of Pingliang were evaluated.These patterns were contrasted with the only-planting crops.Both the gross profits and average profits of intercropping models are 2.5 times as much as the profits of non-intercropping models.And the Pinus tabulaceformis Carr.-Medicago sativa L.intercropping model has the highest profits,which is 263 097 yuan/hm2,and 5.16 times as much as the non-intercropping.The present value(PV) of profits per hm2 of all intercropping model is more than the PV of profits of non-intercropping models.Results showed that the economical benefits of agro-forestry and grass-forestry system are much better than the non-intercropping,which had long-term profits although it needs a larger antecedent investments.
李建刚1；王继和2；蒋志荣1. 庄浪县林农和林草间作模式经济效益评价[J]. 中国水土保持科学, 2007, 5(4): 56-61.
LI Jian-Gang->；Wang-Ji-He-；Jiang-Zhi-Rong. Evaluation of economic benefits of the agro-forestry and grass-forestry system in Zhuanglang County. SSWCC, 2007, 5(4): 56-61.
2007, Vol. 5 
