甘肃省武山县退耕还林工程生态效益监测分析及价值估算

Monitoring Analysis and Value Assessment to Ecological Benefit of Conversion of Farmland to Forest in Wushan County of Gansu

通过对甘肃省武山县退耕还林区域进行布点监测分析得出，武山县退耕还林工程树种选择合理，生态效益明显，最佳树种组成依次为：刺槐山杏混交林〉刺槐侧柏混交林〉刺槐纯林〉落叶松油松混交林〉落叶松纯林；并参照相关指标，对武山县退耕还林从2000～2009年10年来的生态效益进行了价值估算，退耕还林工程10年的生态效益总价值为378638．9万元。结果表明，武山县退耕还林工程发挥着巨大的生态效益。

On the basis of monitoring data and analysis, the author came to the conclusion that tree species selection in the returning farmland to forest project was reasonable, ecological benefit significant. The order of optimum tree species composition were：mixed forest of Robinia pseudoacacia and Prunus armeniaca 〉mixed forest of Robinia p s e udoac ac ia and Platycladus orientalis 〉pure Robinia pseudoacacia forest〉mixed forest of Larix kaempferi and Pinus tab uliformis 〉pure Larix kaempferi forest. The ecological benefit in 10 years （2000-2009） was evaluated and its total value was 378 638.9 yuan. The result indicated that the conversion of farmland to forest project was tive contribution to ecological benefit. making positive contribution to ecological benefit.