Fertilizer source effects on phosphate and nitrate leaching through simulated golf greens.
Phosphorus and nitrogen leached from high-porosity golf greens can adversely affect surface water and groundwater quality. Greenhouse and field lysimeter experiments were carried out to determine the effects of eight fertilizer sources on P and N leaching from simulated golf greens. Phosphorus appeared in the leachate later than nitrate-N, and the highest concentrations were for the soluble 20-20-20 and the 16-25-12 starter fertilizers. The other six sources resulted in lower P concentrations. The soluble 20-20-20 and the 16-25-12 sources each resulted in 43% of the added P eluting in the leachate, whereas the others varied from 15 to 25%. For nitrate-N the lowest cumulative mass was for the controlled-release 13-13-13 and sulfur-coated urea. A higher percentage of applied P than applied N leached from both field and greenhouse lysimeters. However, the amounts of P leached for the field lysimeters were lower than for the greenhouse columns.
Shuman
L M
LM
Department of Crop and Soil Sciences, University of Georgia, Griffin 30223-1797, USA. lshuman@griffin.uga.edu
D003692:Delayed-Action Preparations; D005308:Fertilizers / Q000032:analysis*; D006055:Golf; D009566:Nitrates / Q000032:analysis*; D010758:Phosphorus / Q000032:analysis* / Q000737:chemistry; D012989:Soil Pollutants / Q000032:analysis; D014872:Water Movements; D014873:Water Pollutants / Q000032:analysis*
D003692:Delayed-Action Preparations; D005308:Fertilizers; D009566:Nitrates; D012989:Soil Pollutants; D014873:Water Pollutants; D010758:Phosphorus