EVALUATION OF SIX SUBSURFACE DRIP IRRIGATION CONFIGURATIONS FOR TURFGRASS IN THE MIDWESTERN USA
Population growth is increasing the demand for potable water and subsequently,public scrutiny on use of potable water for landscape irrigation is growing.Therefore,increased irrigation efficiency and use of alternative water sources will become more important.Drip irrigation and water harvesting are two alternative practices that have potential for reducing potable water use for turfgrass irrigation,yet both are relatively uncommon partly because of a lack of scientific information.The objective of this study was to evaluate various depth and spacing configurations of drip emitters required for maintaining turfgrass during periods of limited precipitation.In addition,harvested rainwater was used as the irrigation water source for this study.Two water storage tanks were used to collect rainwater from a large rooftop in Madison,Wisconsin.The rainwater was used for two growing seasons to irrigate a Kentucky bluegrass (Poa pratensis L.) lawn on a silt loam soil with subsurface drip irrigation installed at depths of 12 or 25 cm with spacing of 30,45 or 61 cm.Subsurface drip irrigation treatments were evaluated for soil water content and uniformity and turfgrass quality.Emitters spaced at 45 cm at a 12-cm depth consistently provided the greatest soil water content in the upper 7 cm of the soil root zone and the best turfgrass quality.
soil moisture water harvesting soil water content water conservation
Brad T. Debels Douglas J. Soldat
Department of SoilScience,University of Wisconsin,Madison,Wisconsin USA53706
国际会议
The 12th International Turfgrass Research Conference(第十二届国际草坪学术大会)
北京
英文
53-60
2013-07-14（万方平台首次上网日期，不代表论文的发表时间）