毛乌素沙地生态经济型防护林体系优化结构研究──以海流滩试区为例

Study on the Structure Optimization of Eec-economical Type Protection Forest System in Middle Part of Maowusu Desert Area ──An Example of Hailiutan Experimental Village

根据榆林市金鸡滩乡海流滩村的自然条件和社会经济条件，以林木覆盖度极大为目标，对该区域生态经济型防护林结构优化研究表明。按优化模式实施后，到２０００年，林木覆被率达５２．４％，农、林和牧（草场）土地利用面积之比为１：５．４：０．５。

According to the nature, social and economy condition of Hailiutan village (Jinjitan country,yulin city),the structure Optimization of eec-economical type protection forest system in Hailiutan has been studied, with the aim of maxium forest cover and the result show that if this optimium model be in practice,the forest cover would be at 52. 4%,and the area ratio of farmland, forest land, pasture land would be 1: 5. 4: 0. 5 in the year of 2000.