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Slow Release Fertilizer Decreases Leaching Loss of Nitrogen in Sand-based Root Zone  

Chen, Wei-Feng (Institute of Turfgrass Science, Shandong Agricultural University, Effects of Chitosan on the Growth Responses of Kentucky Bluegrass (Poa pratensis L.))
Wei, Wang (Institute of Turfgrass Science, Shandong Agricultural University, Effects of Chitosan on the Growth Responses of Kentucky Bluegrass (Poa pratensis L.))
Ying-Jie, Qi (Institute of Turfgrass Science, Shandong Agricultural University, Effects of Chitosan on the Growth Responses of Kentucky Bluegrass (Poa pratensis L.))
Publication Information
Asian Journal of Turfgrass Science / v.21, no.2, 2007 , pp. 177-182 More about this Journal
Abstract
When a football field is constructed using sand medium, the fertilizer management has to be adjusted because of the low nutrient holding capacity and higher leaching rate. The objective of this study was to test the effects of slow release fertilizers on Kentucky bluegrass (Poa pratensis L.) growth in simulated sport field rootzones with PVC pipe pots. Data of turfgrass color, uniformity, growth rate, biomass above ground, and the nitrate content in the leaching solution was collected at different growing stages and during four simulated rain fall periods. The result showed that the nutrient release rate of urea was the highest and that of controlled release nitrogen fertilizer was the lowest. Effects of the controlled release nitrogen fertilizer lasted 14 days more than other lawn fertilizers and 28 days longer than regular urea with acceptable quality levels of turf. The slow release fertilizer also restrained excessive growth of the grass, reduced the times of mowing. Slow release fertilizer used in this study reduced $NO_3$-N leaching by almost 50% at the beginning of turf establishment.
Keywords
fertilizer; nitrate; pollution; sports fields;
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