世界各国的实践证明,微灌是一种省水而灌溉效果显著的先进灌溉技术。由于世界上水资源越来越紧张,若干年后,在干旱地区农业生产将主要依赖于微灌。而在非干旱地区,必须提高水的利用率。我国幅员辽阔,自然条件各异,包括干旱区、半干旱区、半湿润区和湿润区。降雨量少的地区急需发展节水灌溉技术,在降雨量充沛的地区,由于降雨量分布不均,也经常发生季节 Practice in various countries of the world has proved that micro-irrigation is an advanced irrigation technology that saves water and has significant irrigation effects. As water resources in the world become more and more strained, a few years later, agricultural production in arid regions will mainly depend on micro-irrigation. In non-arid regions, it is necessary to increase water use efficiency. Our country has a vast territory and varied natural conditions, including arid, semi-arid, sub-humid and humid areas. In areas with low rainfall, there is an urgent need to develop water-saving irrigation technologies. In areas with abundant rainfall, seasons often occur due to the uneven distribution of rainfall