5James B B. Turf Management for Golf Course[M] 2nd Edition. Chelsea, Miehligan: USA. Ann Arbor Press, 2002 : 109-113.
6Karl G, Kelly L K. Nitrogen fertilizer form and associated nitrate leaching from cool-season lawn turf [J]. J. Environ. Qual. ,2004,33 : 1822-1827.
7USGA. Turfgrass and Environmental Research Summary[M]. New Jersey: United States Golf Association Golf House, 2003 : 38-51.
8Wang F, Alva A K. Leaching of nitrogen from slow-release urea sources in sandy soils[J]. Soil Sci. Soc. Am. J. , 1996,60 :1454-1458.
9Snyder G H, Burt E O, Davidson J M. Nitrogen leaching in Bermudagrass turf: 2 effect of nitrogen sources and rates [ A]. Yurfgrass Res. Conf [C]. Guelph,Canada: Int. Turfgrass Society, 1981:313- 314.
10Milter E D,Branham B E, Paul E A.et al. Symposium on pesticide and nutrient fate under turfgrass golf course conditions [J]. Crop Sci. , 1996, 36:1427-1433.