喷灌可以提高水的利用率,同时根据在美国西部不同气候区的试验研究,认为脉冲式的定期喷灌比用其它方法的灌溉对农田小气候的影响要明显得多。但是,如果两次喷灌的间隙时间过长,对农田小气候的改善,例如湿度、空气温度等的改变不会维持太长的时间,因此,采用小水量间隔脉冲?.. Sprinkler irrigation can improve the utilization of water. According to the experimental study in different climatic zones in the western United States, it is considered that the periodic irrigation with pulsed irrigation has significantly more effects on the microclimate than the irrigation by other methods. However, if there is too much clearance between sprinklers, the improvement of cropland microclimates, such as humidity and air temperature, will not be maintained for too long, so use a small water pulse interval.