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Evaluation of Various Slow-release Nitrogen Sources for Growth and Establishment of Poa pratensis on Sand-based Systems  

Lee, Sang-Kook (Dept. of Golf, Hoseo University)
Minner, David D. (Dept. of Horticulture, Iowa State University)
Christians, Nick E. (Dept. of Horticulture, Iowa State University)
Publication Information
Asian Journal of Turfgrass Science / v.24, no.2, 2010 , pp. 145-148 More about this Journal
Abstract
Nitrogen (N) is one of the most important nutrients among 17 essential nutrients for maintaining turfgrass color and quality. The slow release fertilizers were initially developed to provide a more consistent release of nitrogen over a longer period and are often used to decrease leaching potential from sandy soils. The goal of this study is to determine if various slow release N sources affect the rate at which turfgrass establishes. Six nitrogen sources were evaluated; Nitroform (38-0-0), Nutralene (40-0-0), Organiform (30-0-0), Sulfur coated urea (SCU, 37-0-0), urea (46-0- 0), and Milorganite (6-0-0). The root zone media was seeded and sodded with 'Limousine' Kentucky bluegrass (Poa pratensis L.). Sodded pots produced 182 to 518 g more clipping dry weight than seeded pots. Among seeded pots, Milorganite produced greater amount of root dry weight than any other N sources. Because the period of turfgrass growth is different between sodded and seeded plots, there were differences on clipping yield and root growth. Overall, high N rate had turf color greater than acceptable color of 6 among seeded pots throughout the study. However, low N rate didn't produce acceptable turf color throughout the study. Based on the result of this tudy, ilorganite would be ecommended for new establishment of Kentucky bluegrass an urea with less clipping yield which can lead to reduce abor.
Keywords
Kentucky bluegrass; nitrogen; slow release fertilizers; leaching potential;
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