我所1981年在武汉市国营四新农场建立了农田地下排水试验点(试区布置见本刊1984年2期9页)。1981年至1983年对暗管(沟)田间排水性能(下称排水性能)作过试验。其结果是:“水泥砂土暗管与波纹塑料暗管排水性能差别不大。暗管排水性能大大优于滤料暗沟。而稻壳滤料暗沟又优于砂石料暗沟”。 1984年对水泥砂土暗管(下称暗管)和 In 1981, I set up a pilot test site for underground drainage of farmland at the state-owned four new farms in Wuhan City. From 1981 to 1983, tests were conducted on the underground drainage performance (hereinafter referred to as drainage performance). The result is: "There is not much difference between the performance of the pipe and the corrugated plastic pipe drainage pipe, the drainage performance of the pipe is much better than the filter ditch, while the ditch filter is better than the sand ditch. 1984 on the sandy soil cement pipe (hereinafter referred to as dark tube) and