渗灌管不同埋深对蔬菜保护地土壤盐分的影响

以番茄为供试作物，通过观测渗灌灌水前和灌水后土壤全盐含量的变化，研究了保护地渗灌及其渗灌管埋深对土壤全盐运移及积累过程的影响。试验结果表明，在渗灌管埋深为20~40cm范围内，保护地渗灌灌水后土壤全盐均表现出明显的表聚特性；土层深度、渗灌管埋深、土壤水分含量是影响土壤全盐含量的主要因素。在不同渗灌管埋深处理中以30cm埋深且渗灌管下有防渗槽的处理全盐在表层积累最少，且盐化速度较缓。

Effect of Infiltration Depth on Soil Total Salt in Tomato Cultivated Protected Field

Effect of subsurface irrigation and infiltration depth on movement of soil total salt and its accumulation in protected field was studied.Tomato used as experimental plant. The results show that soil total salt accumulated in topsoil after subsurface irrigation with infiltration depth between 20 cm and 40 cm. The soil total salt was distinct influenced by the product of soil water and soil depth and infiltration depth. The content of soil total salt was the least in the treatment of 30 cm infiltration depth with prevention film.