利用塑料暗管排水,在六、七十年代有了飞跃发展。目前,荷、美、日、英、法、德、罗等几十个国家已广为采用。塑管比陶管重量轻,运输施工方便,省工。做成连续的管道,田间不需接口,不易淤塞。现广泛应用于农田排水、淋盐改土等方面,是当前世界上许多国家主要排水方式之一。我国农田的地下排水设施较为落后,全国有二亿亩左右盐碱地,产量很低;一亿亩左右水稻土,土壤内排水不良,渍害较为普遍,严重影响农业生产的发展,因此排水治 The use of plastic tube drainage, in the sixties and seventies has made leaps and bounds. At present, the Netherlands, the United States, Japan, Britain, France, Germany, Romania and other dozens of countries have been widely adopted. Plastic pipe light weight than the pottery, transportation and convenient construction, labor-saving. Made of continuous pipe, field without interface, easy to silt. Now widely used in farmland drainage, salinization and so on, is currently one of the major drainage methods in many countries in the world. The underground drainage facilities of farmland in our country are relatively backward. There are about 200 million mu of saline-alkali land in the country, and the yield is very low. About 100 million mu of paddy soil has poor drainage in the soil and the soil damage is more common, which seriously affects the development of agricultural production. Therefore,