“三荒”是指具有一定土壤肥力的荒山、荒沟、荒坡。朝阳地区主体山脉是努鲁尔虎山，西北至东南走向，微地形背风向阳，小气候条件优越，为发展保护地生产提供了有利条件。凌源市城关镇十五里堡村，从１９９２年开始利用“三荒”资源发展蔬菜保护地生产，取得了显著的经济效益 “Three shortage” refers to a certain degree of soil fertility barren hills, waste ditches, barren slopes. The main mountain ranges of Chaoyang are the Nururugu Mountain and the trend from northwest to southeast. The micro-terrain leeward and sunny, the microclimate conditions are superior, which provide favorable conditions for the development of protected areas. From fifteen miles to Fort Town in Chengguan Town, Lingyuan City, from 1992, “three wastes” resources have been used to develop production of vegetable reserves and significant economic benefits have been achieved