Effect of Water-table Management Practices on the Transport of Nitrate-N to Shallow Groundwater
作者： P. K. Kalita , R. S. Kanwar
DOI: 10.13031/2013.28353
关键词: Water table 、 Groundwater 、 Environmental science 、 Hydrology 、 Water quality 、 Nitrogen 、 Lysimeter 、 Growing season 、 Subirrigation 、 Crop yield
摘要: Field experiments were conducted for three years (1989-91) at the research farms of Iowa State University near Ames and Ankeny to evaluate water-table management (WTM) effects on groundwater quality. Water-table depths 0.3, 0.6, 0.9 m maintained in field lysimeters site, variable a subirrigation site. Water samples collected from various soil analyze NO3-N concentrations groundwater. Concentration changed with WTM practices. The lowest observed under shallow depths. generally decreased increased time during growing season all Crop yields higher 0.6 than other depths, corn 0.2 0.3 m. Results this study indicate that practices can be used substantially reduce also strongly support need further water quality crop production.
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