中文摘要：

以高温伏旱区麦/玉/薯三熟为对象,研究了不同保护性耕作下旱地作物实际耗水量、需水量、作物系数和水分生态适应性。结果表明：不同保护性耕作明显降低作物耗水量、需水量和作物系数,增强了作物水分生态适应性能力,其效果顺序为：RSD〉TSD〉RS〉TS〉R〉T（CK）,处理RSD使作物水分生态适应性指数增强了6.47%。研究结果显示,高温伏旱区三熟制在平水年中,保护性耕作增强了作物生态适应性。

英文摘要：

Studied water comsuption,water demand,water demand index and water ecological adaptability of different conservation tillages based on triple crops a year with wheat and maize and sweet potato in the hot and summer drought areas.Results indicated that there were significant effects on water ecological adaptability.The effect order was RSD TSD RS TS R T（CK）,especial the water ecological adaptability of RSD was increased 6.47%.Results showed that under normal rainfull year,conservation tillage could get compositive effect on triple crops a year with wheat and maize and sweet potato in the hot and summer drought areas.