作　　者： ; ; ; ; ;

机构地区： 沈阳农业大学土地与环境学院

出　　处： 《节水灌溉》 2006年第5期15-17,21,共4页

摘　　要： 以番茄为供试作物，通过观测渗灌灌水前和灌水后土壤水分剖面以及硝态氮含量的变化．研究了保护地渗灌及其渗灌管埋深对土壤硝态氮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硝态氮均表现出明显的表聚特性；土壤含水量与土层深度乘积与土壤硝态氮含量之间存在着极显著相关关系。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，其硝态氮在表层积累最少。 Taking tomato as experimental crop, the influence of subirrigation and subirrigation pipe depth on movement and accumula tion of soil nitrate nitrogen in protected field was studied through observing the change of soil water distribution and content of soil nitrate nitrogen between before and after subirrigation. The result showed that nitrate nitrogen accumulated in topsoil after subirriga tion with sunirrigation pipe depth from 20 cm to 40 cm. The nitrate nitrogen was distinctly influenced by the product of soil water content and soil depth. The content of soil nitrate nitrogen was the least in the treatment of 30 cm subirrigation pipe depth with prevention film.

关 键 词： 渗灌 保护地 渗灌管埋深 硝态氮

领　　域： [农业科学] [农业科学] [农业科学] [农业科学]