水稻合理灌排是提高单产的重要措施之一。据试验,对水稻进行合理灌排比深水淹灌增产12—27%。水稻合理灌排技术可简单归纳为以下四个方面: 一、浅水栽秧,适水返青。浅水栽秧,能达到稳、匀、浅、端,无浮秧,成活快,返青早。据试验和调查,浅水栽秧比深水栽秧浮秧少17.2—21.3%,提早1—2天返青。浅水一般以花花水至3.3厘米为宜。 Rice irrigation and drainage is one of the important measures to improve yield. According to the experiment, the rational irrigation and drainage of rice increased by 12-27% than that of deep-water irrigation. Rice irrigation and drainage technology can be easily grouped into the following four aspects: First, the shallow water seedlings, suitable water to green. Shallow water seedlings, can reach a stable, uniform, shallow, end, no floating seedling, fast-growing, early greening. According to the tests and surveys, shallow seedlings grow 17.2-21.3% less than deep-water seedlings and return to green 1-2 days earlier. Shallow water generally flowers to 3.3 cm is appropriate.