[Objective] To study the effect of different tillage methods on the sandy chestnut soil topsoil moisture content and water use efficiency in northwest Hebei alpine district,and to explore high-efficient water use to provide a theoretical basis for crop production. [Method] With the test material of local main cultivated varieties of late-maturing oat pin 5 ,the topsoil moisture content was measured at the seedling stage,tillering stage,jointing stage,booting stage,heading stage and harvesting stage by the drying method. [Result] The average topsoil moisture content during the seedling stage was 6.26% without tilling,higher than the deep loosing at 5.33% ,and ploughed tillage at 5.39% ,which were insignificantly different after the tillering stage. The water consumption intensity was insignificantly different in different tillage and at different growth stages,the water consumption intensity during the whole growth period changed consistently, showing bimodal and dual valley, bimodal appeared at the seedling and heading stage at 2.31-2. 51 mm/d,dual valley appeared at the tillering and harvest stage period of 1.07 - 1.32 mm/d. The average water use efficiency of no-tillage was 2. 24 kg/( mm · hm ), significantly less than deep loosing and ploughed tillage of 4. 10 and 4. 07 kg/ (mm · hm ). The yield of oat and the inter-annual water use efficiency showed the same change trends with the water consumption, but within the same year,the water consumption of different tillage patterns differed significantly,and the changes of yield and water use efficiency were consistent with each other. [Conclusion] No tillage at the seedling stage can improve the topsoil moisture content in northwestern Hebei alpine district , but the improvement was not obvious after the seedling stage; the water consumption degree was mainly influenced by the climatic factors, while lightly affected by the tillage patterns. The water use efficient under deep losing and ploughed tillage was obviously higher than that under no tillage, deep losing is the effective technical measure to protect the eco-environment and realize the steady growth of farmland yield.%[目的]不同耕作方式对华北高寒区砂质栗钙土耕层含水率和水分利用效率的影响,探讨区域水分高效利用途径,为作物生产提供理论依据.[方法]供试材料为当地主栽晚熟莜麦品种品五.采用烘干法,分别于苗期、分蘖期、拔节期、孕穗期、抽穗期和收获期测定耕层土壤水分.[结果]耕层平均含水率苗期免耕为6.26％,高于松耕的5.33％和翻耕的5.39％,分蘖期之后三者差异不显著.不同耕作方式不同生育时期间莜麦耗水强度无显著差异,生育期耗水强度变化趋势一致,呈双峰双谷型,峰值分别出现在苗期和抽穗期为2.31～2.51 mm/d,谷值出现在分蘖期和收获期为1.07 ～ 1.32 mm/d.免耕平均水分利用效率为2.24 kg/(mm·hm2),显著小于松耕和翻耕的4.10和4.07 kg/(mm·hm2),莜麦产量及水分利用效率年际间与耗水变异趋势相同,但同一年内不同耕作方式耗水量差异不显著,而产量与水分利用效率变化趋势一致.[结论]华北高寒区免耕能在苗期提高土壤耕层含水率,但在苗期之后作用不明显；莜麦耗水强度主要受气候因子的影响,不同耕作方式对其影响不大；翻耕和松耕莜麦水分利用效率明显高于免耕,松耕是该地区兼顾生态环境保护及农田稳产增收的有效技术措施.
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