杨树速生丰产林不同间作模式经济效益分析

发展林下经济是提高杨树速生丰产林经济效益的有效途径。采用净现值法和投入产出比法对不同间作模式的杨树速生丰产林进行了经济效益分析。共设计试验了3种不同的林下间作模式，一是林下养禽，二是林下养殖双孢菇，三是林下种植牧草。通过对3种杨树速生丰产林间作模式的调查和经济效益分析，结果表明，林禽间作模式为经济效益最高，为最优的选择；其次是林菌间作模式；第三是林草间做模式。同时，根据各种间作模式的年均净现值和投入产出比最大值出现的年份，3种间作模式的经济成熟龄均为第9年。

Analysis on the economic benefit of different intercropping model of fastgrowing and high- yield poplar forest

Developing intercrop or livestock under the forest is an effective way to increase the economic benefit. This paper studied the economic benefit of different intewropping model of poplar forest. Three intereropping models were included:raising poultry under forest, growing agaricus bisporus under forest and growing grass under forest. The result showed the model of forest and poultry intereropping is the best one, the forest and mushroom model the second and the forest and grass model the third. Meanwhile, according to the mean net present value and investment and revenue ratio, the economic mature age of the forest for these three models was 9 year.