辽西北沙地治理的生态及经济效益分析

Ecological and economic benefits of sandy land management in the northwest of Liaoning Province

以围封为主,人工栽培固沙植物为辅的方法固定流动沙丘,可以在5~6年内使严重沙化的沙丘,基本得到稳定,植被获得恢复,沙地土地生产力提高3~5倍。在起伏比较大的沙丘的平缓地段和丘间低地开发农田,须营造防护林,实施保护性耕作措施,也可以带状栽培沙打旺,防止土地发生风蚀沙化。在起伏比较大、沙化比较强的沙丘,利用小面积丘间低地,营造优良品种杨树,可以获得速生丰产。

The migratory dune is controlled by the method of enclosure based and supplemented by artificial cultivation sand fixing plants, the serious sand dunes can basically stable and vegetation recovery in 5 to 6 years, the land productivity of sand will increase by 3 - 5 times. Farmland development must construct the protection forest and implement protective tillage in the relatively fiat terrains and lowland area in the sand dunes with large undulation. Astragalus adsurgens belt also can be grow to prevent the wind erosion and desertification. The improved poplar is a fast growth and high yield tree specie, we can planted poplar in the small lowland area which between the sand dunes with large undulation.