1节水灌溉意义从自然生态的现状看，水资源缺乏已成为世界的必然趋势。合理利用水资源，科学节水灌溉，是解决水田缺水，扩大灌溉效益增产、稳产的根本出路。将灌水定额合理地降到最低点则是一举多效的措施。一是现有蓄灌工程可以扩大效益，二是浅水灌溉可以提高水温，促进早熟 A water-saving irrigation significance From the status quo of natural ecology, the lack of water resources has become the inevitable trend of the world. Rational use of water resources, scientific and scientific water-saving irrigation is to solve the water shortage in paddy fields, expand irrigation efficiency and increase production and stable output of the fundamental way. It is a multi-effect measure to reduce irrigation quota to the lowest level reasonably. First, existing irrigation projects can expand benefits, and second, shallow irrigation can raise water temperature and promote premature