中文摘要：

为缓解干旱区水资源短缺,提高作物的水分利用效率,以武威地区春小麦为研究对象,通过控制不同生育期计划湿润层深度来实现根区土壤水分的垂向调节,研究根区土壤水分垂向调控对春小麦水分利用的影响。结果表明：通过控制不同生育期计划湿润层深度可以实现对根区土壤水分分布及作物根系分布的调控,也会对土壤水的吸收、利用造成较大影响。以灌溉水利用效率为衡量指标,来评价各处理节水效果,最优调控方案为：灌水下限为65%田间持水量,苗期计划湿润层深度为40cm,拔节期计划湿润层深度为50cm,抽穗期至成熟期的计划湿润层深度为60cm。

英文摘要：

To alleviate the shortage of water resources in arid areas and improve the crop water use efficiency ,the study regulated the root zone soil moisture distribution in vertical direction by controlling scheming wetted soil layer depth in different growth periods . This paper analyzed the effect of the regulation in vertical direction on water use of spring wheat .The results show that ：The control of scheming wetted soil layer depth in different growth periods could regulate soil moisture profile and effect the distribution of crop root system better ,so as to impact on absorption and utilization of soil water greatly .The study regarded the use efficiency of irriga‐tion water as the index which was used to evaluate the treatments＇effect of water-saving .Results show that the optimal regulation in vertical direction is 40 cm ,50 cm ,60 cm of scheming wetted soil layer depth at seeding ,jointing ,heading to mature stages ,and the irrigation down limit is 65% of field capacity .