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Influence of Subirrigation Pipe Depth on Soil Nitrate Nitrogen in Protected Field for Tomato Cultivation
Author(s): 
Pages: 15-17,21
Year: Issue:  5
Journal: WATER SAVING IRRIGATION

Keyword:  渗灌保护地渗灌管埋深硝态氮;
Abstract: 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20~40 cm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30 cm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.
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