地下排灌较之明渠排灌有着巨大的优越性,它不仅在治渍、抗旱、改土、增产等方面有显著的效益,而且还省地、省工、省水,提高排灌效率,扩大排灌面积,有利于调温调肥、除害灭病、水土保持和农机作业等;一次投资虽然较大,但从长远观点来看,长期受益,反而可以降低农本。近十年来,国外已广泛采用暗管排水,有的国家暗排面积已占总排水面积的70%以上,地下灌溉和管道输水也得到迅速发展。我国地下排灌事业也正在兴起,许多省、市在有关科研方面取得了可喜的成果,并在生产上得到推广运用,促进了农业生产。水利部科技局委托江苏省水利科学研究所主编了《农田地下排灌科研报告论文集》,全书共收入 The underground drainage and irrigation have a tremendous advantage over the drainage and irrigation of the open channel. It not only has significant benefits in controlling soil erosion, drought resistance, soil improvement and yield increase, but also saves land, labor and water, increases irrigation and drainage efficiency, increases irrigation and drainage area, It is conducive to thermostat fertilization, pest elimination, soil and water conservation and farm machinery operations. Although the investment is large, in the long run, long-term benefits can actually reduce the cost of farming. Over the past ten years, foreign countries have widely adopted concealed pipe drainage, some countries have accounted for more than 70% of the total drainage area, underground irrigation and pipelines have also been rapid development. Underground drainage and irrigation are also emerging in our country. Many provinces and municipalities have made gratifying achievements in relevant scientific research. They have also promoted their use in production and promoted agricultural production. Science and Technology Bureau of the Ministry of Water Resources commissioned the Jiangsu Provincial Institute of Water Resources editor of the “farmland underground irrigation scientific research papers”, the book total income