PHOSPHATE AND NITRATE MOVEMENT THROUGH SIMULATED GOLF GREENS

摘要

Phosphorus and nitrogen can leach from porous golf greens potentially causing degrada- tion of ground water quality. A greenhouse experiment was carried out with 52 cm columns(15 cm diam.)made to USGA green specifications and sodded to 'Tifdwarf' bermudagrass to determine the effects of fertilizer sources at various rates on P and N leaching. Fertilizers were balanced soluble and controlled-release(poly and sulfur coated)sources at N rates of 0, 12, 24 and 49 kg N ha~-1 and at P rates of 0, 5, 11, and 21 kg ha~-1 every other week for a total of 6 applications.