暗管排水对涝渍地耕层土壤理化性质的影响

涝渍地土壤存在的主要问题是上、中层土体水分过多,排水成为提高土地生产力的关键措施,而暗管排水技术则是实现有效排水的重要手段之一。采用对比分析法研究了不同埋管年期的耕层土壤理化性质,结果表明,与对照比较,暗管排水处理能有效地降低地下水位和改善耕层土壤的物理环境,有利于农业机械耕作,但土壤的速效养分有所降低。因此,要加强对暗管埋设区的土壤培肥管理。

Effect of Subsurface Drainage on Physical and Chemical Properties of Cultivated Strata on Water-logged Land

The main trouble of water-logged land is water-logging in upper and middle soil strata.So drainage becomes key measure of increasing land productivity. Whereas,the technique of subsurface drainage is one of important means that achieved effective drainage. The physical and chemical properties of cultivated stratum of different periods of embedded pipe were carried out by using contrast method. The results showed that the treatment of subsurface drainage effectively decreased underground water level,ameliorated physical environment of cultivated stratum and in favor of plough by agricultural machine,but slightly decreased effective nutrient elements of the soil,compared with control. Therefore,soil fertility of embedded plots of subsurface drainage pipe must be strengthened.