所谓水稻无水层灌溉，就是在水稻秧苗返青后不再在田面上积水，而是根据水稻不同生长期的需要，使土壤保持70％－100％的含水量。按常规～季水稻需灌水12－20次，而采用这种灌溉技术，只需2－6次，灌溉水量大大减少。操作方法有两种。第～种称之为湿种旱育。湿种，就是在插秧（ The so-called water-free irrigation of rice is to no longer accumulate water on the surface after the rice seedlings turn green, but to keep the soil at 70% -100% water content according to the needs of rice in different growing periods. According to conventional ~ season rice needs to be irrigated 12-20 times, and using this irrigation technology, just 2-6 times, irrigation water greatly reduced. There are two methods of operation. The first species called wet drought nurturing. Wet species, that is, transplanting (