我国的水资源非常匮乏,采取合理的灌溉技术对充分利用有限的水资源具有非常重要的意义。北方旱作区宜采用以下几种灌溉技术措施。 1.地面节水灌溉技术 主要是通过地面渠道系统或地下管道系统将水送到田间,水流在田块表面形成薄水层或细小的水流,渗入土壤中。此法设备简单,但存在跑水、流失、蒸发和深 The water resources in our country are very scarce. It is very important to take reasonable irrigation techniques to make full use of the limited water resources. Northern dry area should adopt the following kinds of irrigation techniques and measures. 1. Ground water-saving irrigation technology is mainly through the ground channel system or underground pipeline system to send water to the field, the water flow in the field surface layer of thin water or small water flow into the soil. This method is simple equipment, but there is running water, loss, evaporation and deep