低质山杨林生态改造后土壤肥力综合评价

The Comprehensive Evaluation of Soil Fertility of Populus davidiana Low-quality Forest Stands after Ecological Transformation

2009年对大兴安岭低质山杨林进行顺山带宽(分别为6、10、14、18 m)分别栽植西伯利亚红松(Pinus sibirica)、兴安落叶松(Larix gmelinii)、樟子松(Pinus sylvestris var.mongolica Pine)进行诱导改造;应用灰色关联度法对不同带宽生态改造后的林地土壤肥力进行综合评价。结果表明,所有的生态改造对土壤肥力均有改善作用,其中带宽以14 m,树种以兴安落叶松的诱导改造效果最佳,可为低质山杨林的改造提供参考。

Determined and analyzed the changes about the soil fertility of populus davidiana low quality forest. With bandwidths strip reforms in the Greater Hinggan Mountains region and then planting separately Pinus sibirica ,Larix grnelinii, Pinus sylvestris var. mon- golica from 2009. Grey system was used to theoretically investigate the soil fertility indexes of the low-quality forest after the low - quality forest alternated in different bandwidth strip reforms. We performed the comprehensive evaluation of soil fertility in different ecological transformations using grey correlation, and the results showed us that all transformation methods showed positive effects on the soil fertility. The best bandwidth of ecological transformation is 14 m, and the Mongolica induction was the best effect induced transformation of Soil fertility. We developed a comprehensive evaluation method for populus davidiana low-quality forest alteration, which can provide a basis for forest management.