陇东黄土高原地区是我国苹果的重要优势产业带。该地区苹果园的土壤及环境条件有以下显著特点:黄绵土及黑垆土。该区域土层深厚、土质疏松;土壤有机质含量较低,多在1%左右;土壤pH值多在7.2—8.5之间,呈中性至弱碱性;光照足,气温高,蒸发量大,降雨最少而分布不匀。80%以上的果园为完全雨养果园或者保 Longdong Loess Plateau is an important industrial belt of apple in China. The apple orchards in the area have the following distinctive soil and environmental conditions: loamy soil and blackhead soil. The soil of this area is deep and the soil is loose. The soil organic matter content is relatively low, mostly about 1%. The pH value of soil is mostly between 7.2-8.5, Rainfall is least and unevenly distributed. More than 80% of the orchards are completely rainfed orchard