Details

Autor(en) / Beteiligte

• Vietor, D.M
• Griffith, E.N
• White, R.H
• Provin, T.L
• Muir, J.P
• Read, J.C

Titel

Export of Manure Phosphorus and Nitrogen in Turfgrass Sod

Ist Teil von

• Journal of environmental quality, 2002-09, Vol.31 (5), p.1731-1738

Ort / Verlag

Madison: American Society of Agronomy, Crop Science Society of America, Soil Science Society

Erscheinungsjahr

2002

Quelle

Wiley Online Library All Journals

Beschreibungen/Notizen

• Regulatory mandates have increased demand for best management practices (BMPs) that will reduce nutrient loading on watersheds impaired by excess manure P and N. Export of manure P and N in turfgrass sod harvests is one BMP under consideration. This study quantified amounts and percentages of P and N removed in a sod harvest for different rates of manure and inorganic P and N. Six treatments comprised an unfertilized control, two manure rates with and without supplemental inorganic N, and inorganic P and N only. The treatments were applied to ‘Tifway’ bermudagrass (Cynodon dactylon L. × C. transvaalensis Burtt-Davey), ‘609’ buffalograss [Buchloe dactyloides (Nutt.) Engelm.], and ‘Reveille’ bluegrass (Poa arachnifera Torr. × P. pratensis L.) under field conditions. Comparisons among treatments revealed small variations of P and N content in clippings and the plant component of sod, but large variations in the soil component of sod for each turf species. In addition, 2 to 10 times more P and 1.3 to 5 times more N was removed in soil than in plant components of sod for the two manure rates with and without added inorganic N. Percentages of applied P and N in harvested sod were similar for the two manure rates with and without added N for each species, but differed among turf species for each P (46 to 77%) and N (36 to 47%). The large amounts and percentages of manure P and N removed by sod harvest support the feasibility of this BMP in efforts to reduce nutrient loads on watersheds.