粮食生产是党和政府工作的重中之重,但北京是缺水地区,粮食生产如果不走节水的路子,就没有可持续性。20世纪80年代,北京市率先推广了半固定式喷灌,90年代喷灌比例最高时达到70%以上,以后又推广了低压管道灌溉技术,以减少输水损失。近几年又建立了多个节水效果更好的微喷和滴灌等节水灌溉试点。2012年北京市农田灌溉水利用系数达到0.70,在国内位居第二,较2001年提高了0.15;粮食水分生产效率达到1.53千克/米3,较2001 Grain production is the top priority of the work of the party and the government. However, Beijing is a water-scarce region. If food production does not follow the path of saving water, there will be no sustainability. In the 1980s, Beijing took the lead in promoting semi-fixed sprinkler irrigation. When the proportion of sprinkler irrigation reached 70% at the highest in the 1990s, low-pressure pipe irrigation technology was later promoted to reduce water loss. In recent years, it has also established a number of water-saving irrigation pilot projects such as micro-jetting and drip irrigation that have better water saving effects. In 2012, the coefficient of farmland irrigation water utilization in Beijing reached 0.70, ranking the second in China, an increase of 0.15 over 2001; the water production efficiency of grain reached 1.53 kg / m 3, up from 2001