淳化泥河沟流域农林复合生态经济系统优势分析

尝试用灰色关联分析方法，以农业总产值、林果业产值、粮食单产、人均纯收入为母因素，对淳化泥河沟流域农林复合生态经济系统森林覆盖率等１１个影响因素的影响程度进行了优势分析和排序，得出：苹果面积＞林果业收入＞治程度＞商品率＞养殖业收入＞有机肥投入＞无机肥投入＞年降水量＞森林覆被率＞工副业收入＞种植业收入。分析认为农林复合生态经济系统的建设是黄土残原沟壑区农业“两高一优”持续发展和农村经济发展的主要途径之一和发展方向，林果业、治理度和商品率是影响该系统的三要素。

Analysis of Dominant Factors in Eco-economic Agroforestry System of Nihegou Valley at Chunhua County

Factors affecting eec-economic agroforestry system of Nihegou Valley was analyzedby grey correlative analysis. The dominant order of factors are follows: area of apple garten, netincome of forestry and fruit trees, control degree of soil erosion, commodity rate, net incomeform livestock breeding, input amount of manure, input amount of mineral fertilizer, annual precipitation, forest cover, net income of industry alld sideline, net income of planting crops andcash crops. The eec--economic agroforestry system must be built up and should be a main wayof the continued advance of agriculture and rural economiy in Loess Plateau. Forestry and fruitplatations, contro degree of soil erosion and commodity rate are three dominant factors, whichplay a great role in the system.