庄浪县林农和林草间作模式经济效益评价  

Evaluation of economic benefits of the agro-forestry and grass-forestry system in Zhuanglang County

作　　者：李建刚[1] 王继和[2] 蒋志荣[1] 

机构地区：[1]甘肃农业大学林学院,兰州730070 [2]甘肃省治沙研究所,甘肃武威733000

出　　处：《中国水土保持科学》2007年第4期56-61,共6页Science of Soil and Water Conservation

基　　金：国家科技支撑计划"黄土高原丘陵沟壑区保护性耕作技术集成研究与示范"(2006BAD15B06)

摘　　要：采用静态和动态评价方法,对平凉地区庄浪县周边乡镇处于不同生长周期的林农、林草间作模式与单纯种植农作物模式的经济效益进行对比分析和评价。结果表明:各林农、林草间作模式的总利润和年均利润都在单纯种植农作物的2.5倍以上,其中油松间作苜蓿模式的总利润最高,达到26万3 097元/hm2,为单纯种植农作物的5.16倍;各间作模式单位面积的年均利润现值均大于单纯种植农作物的年均利润现值4800.9元/hm2。因此,林农、林草间作模式先期投入虽然大,但有长期的经济效益,而且较单农种植明显适宜于在黄土丘陵沟壑区发展。Using the methods of static evaluation and dynamic evaluation, the economical benefits of the agroforestry 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 prof- its 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/ hm^2, and 5.16 times as much as the non-intercropping. The present value（PV） of profits per hm^2 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 longterm profits although it needs a larger antecedent investments.

关 键 词：林农间作 林草间作 经济效益 评价 

分 类 号：S812[农业科学—草业科学]